Sandpaper gost 6456 82

State standard of the USSR GOST 6456-82

"Pelt PAPER GRINDING. TECHNICAL SPECIFICATIONS"

Abrasive paper. Specifications

Instead of GOST 6456-75

This standard applies to abrasive paper intended for abrasive processing of various materials without cooling or using cutting fluids based on oil, kerosene, white spirit.

1. Types and sizes

1.1. Sandpaper should be made of types:

1 - for machine and manual processing of non-metallic materials (wood, leather, rubber, plastic, etc.);

2 - for machine and manual processing of metals, alloys.

1.2. Sandpaper should be produced in rolls, the dimensions of which are indicated in table. one.

Table 1

Grain	Width, mm (pre-dev. ± 3.0)	Length, m (pre-dev. ± 0.5)

	720; 750; 800; 850; 900; 1000
	1250; 1350; 1400

	720; 750; 800; 850; 900


	1250; 1350; 1400
	720; 750; 800; 850; 900

Note. At the request of the consumer, it is allowed to manufacture rolls with a length of more than 100 m.

1.3. The abrasive paper must be made with the following types of working layer:

C - solid;

P - embossed.

1.4. The designs and dimensions of the embossed working layer must correspond to those indicated in the drawing and in table. 2.

table 2

Dimensions, mm

Grain	Width, a
Grain	Interval	Prev off	Interval	Prev off

The angle of inclination of the relief alpha should be 5 ° -85 °.

1.5. The deviation from parallelism of the forming lines of the relief should be within the tolerance for the relief step.

An example of a conventional designation of a paper abrasive cloth of type 1, with a continuous working layer C, 1000 mm wide, 50 m long, on paper of grade 0-200, made of normal fused alumina grade 15A, grain size 25-N, on flesh glue:

1C 1000X50 P2 15A 25-N M GOST 6456-82

2. Technical requirements

2.1. Abrasive paper shall be manufactured in accordance with the requirements of this standard.

2.2. The abrasive paper should be made from the abrasive materials specified in table. 3.

Table 3

Type of abrasive	Grinding material grade
Normal fused alumina	15A; 14A; F14A; 13A; F13A
White fused alumina	25A; 24A; 23A
Alloy electrocorundum	94A; 93A; 92A; 91A; 91A-M and 92A-M
Zirconium alumina
Monocorundum
Green Silicon Carbide
Black silicon carbide	54C; 53C; 51C

Note. At the request of the consumer, it is allowed to manufacture abrasive skins from other grades of abrasives or their mixtures.

2.3. For the manufacture of abrasive skins, paper should be used as a basis in accordance with GOST 18277, GOST 10127 and industry regulatory and technical documentation for paper in accordance with table. 4.

Table 4

Paper stamp	Symbol	Paper stamp	Symbol

Note. If the paper does not have an established symbol, it is allowed to indicate its brand in the symbol of the abrasive paper.

(Modified edition, Amendment N 2).

2.4. The abrasive paper should be made from abrasives of the grain sizes indicated in table. 5.

Table 5

Note. At the request of the consumer, it is allowed to manufacture abrasive skins of other grain sizes or their mixtures.

(Modified edition, Amendment N 3).

2.5. Grinding material should be bonded to the base with flesh glue in accordance with GOST 3252 or other bonds in accordance with industry regulatory and technical documentation.

Note. It is allowed to introduce dyes or coloring pigments into the bundle.

2.6. The grain size composition of the grinding materials is in accordance with GOST 3647.

2.7. (Deleted, Amendment No. 3).

2.7.1. On the working surface of the abrasive cloth with a continuous working layer, the total area of wrinkles, folds, areas without abrasive grains, filled with a binder, should not exceed 0.5% of the roll area.

Note. By agreement with the consumer, the total area of these defects is not more than 1% of the roll area.

2.7.2. On the working surface of the abrasive paper with a relief working layer, the total area of defects (merging and non-printing) of the relief layer per 1 m 2 should not exceed 5% of the area of the roll with the applied abrasive material.

(Modified edition, Amendment N 3).

2.7.3. In a roll of sanding paper with a width of up to 1250 mm, edges with a width of more than 10 mm with defects are not allowed, with a width of more than 1250 mm - more than 15 mm.

Note. On the working surface of silicon carbide and electrocorundum abrasive paper of grain size 6-M40, point glue formations or blotches protruding above the working surface are not allowed.

(Changed edition, Rev. N 1, 2, 3).

2.8. The unevenness of the thickness of the sanding paper should correspond to the values indicated in table. 6.

Table 6

2.9. The tensile strength of the abrasive paper, depending on the grade of paper, must correspond to the values indicated in table. 7.

Table 7

Symbol of paper	Symbol of paper
Symbol of paper	Symbol of paper	longitudinal	transverse	longitudinal	transverse

2.10. Coefficient of application of abrasive to the base K n for abrasive cloth with a relief working layer should be 0, 40-0, 75.

2.11. The moisture content of the sanding paper should be 3-7%.

2.12. The reduced wear of electrocorundum and glass grinding skins must correspond to the values indicated in table. eight.

Table 8

Grain	Reduced wear for types
Grain

Note. The reduced wear of silicon carbide abrasive paper with grit size 6-M40 type 1 should be 1, 5-7, 0; type 2 - St. 7, 0.

(Modified edition, Amendment N 2).

2.13. The cutting ability of the abrasive paper under the test conditions specified in the mandatory annex 2 must correspond to the values specified in table. 8a.

Table 8a

Grain	Cutting capacity of the skin, g / min, not less
Grain	electrocorundum	silicon carbide	glass

(Modified edition, Amendments N 2, 3).

3. Acceptance rules

3.1. Acceptance inspection and periodic testing should be carried out to control the conformity of the abrasive paper with the requirements of this standard.

3.2. Acceptance control for compliance with the requirements of paragraphs. 1.2, 2.7.1, 2.7.2 and 2.7.3 should be exposed to at least 1% of rolls of sanding paper from the batch, but not less than 3 pieces, according to paragraphs. 1.4; 1.15; 2.12 and 2.13 - 0.1%, but not less than 3 pcs.

3.1, 3.2. (Modified edition, Amendment N 2).

3.2.1. A batch should consist of a sanding paper of one characteristic, made in one shift and simultaneously presented for acceptance on one document.

3.3. If, during acceptance control, non-compliance with the requirements of the standard for more than one controlled indicator is established, then the batch is not accepted.

(Modified edition, Amendment N 2).

3.3.1. If a discrepancy with the requirements of the standard for one of the monitored indicators is established, then a second control is carried out on a doubled number of rolls of skin.

If there are defects in the resampling, the lot is not accepted.

(Introduced additionally, Rev. N 2).

3.4. Products (one of the roll sizes) that have passed the acceptance control (according to clause 3.2) for compliance with the requirements of clauses must be periodically tested. 2.8 and 2.10 0.5%, but not less than 3 pcs., P. 2.9 and 2.11 0.5% rolls of 40 grit sandpaper; eight; 5 and M40, but not less than 3 pcs., P. 2.9 - on all types of bases.

(Modified edition, Amendment N 2).

3.5. Periodic tests should be carried out at least once a year.

(Modified edition, Amendment N 3).

4. Methods of control and testing

4.1-4.1.2. (Excluded, Rev. N 2).

4.2. The dimensions and external defects of the working surface of the grinding skin are measured with a measuring metal ruler in accordance with GOST 427 or a measuring metal tape in accordance with GOST 7502.

4.2.1. The angle of inclination of the relief is measured with universal measuring instruments or a special template.

4.3. The unevenness of the thickness of the skin is measured with a micrometer of the MK type (with a tolerance limit of ± 0.01 mm) at a distance of at least 10 mm from the edge of the roll.

(Modified edition, Amendment N 2).

4.4. The calculation of the coefficient of applying thin section material to the base K n is given in the mandatory Appendix 1.

4.5. To determine the moisture content of the sanding paper, three samples of 100x100 mm are taken, weighed on a technical balance with a tolerance limit of ± 0.01 g. Samples of the sanding paper are placed in an oven and dried at a temperature of (100 ± 5) ° C until the difference between two consecutive weighings will not exceed 0.02 g.

The moisture content of the abrasive paper is determined by the difference in masses before and after drying and is calculated as a percentage of the initial mass.

4.6. The reduced wear of the abrasive skin (the ratio of the grain size of the abrasive skin to its crumbling) is determined on the KZSH VNIIASH device by abrasion of the skin on the skin for 2 minutes at a load of 29.4 N.

The test is carried out on two samples of abrasive paper with dimensions of 395x50 mm and 520x50 mm.

The samples are weighed on a technical balance with a tolerance limit of ± 0.05 g.

Notes:

1. The crumbling capacity of the abrasive skin is equal to the mass of the crumbling working layer at a given time interval under given conditions.

2. When calculating the reduced wear for grain sizes M63; M50 and M40 in the numerator are taken, respectively, the numbers 5; 4 and 3.

(Modified edition, Amendment N 2).

4.7. The method for determining the cutting ability of the abrasive paper is given in the mandatory Appendix 2.

4.8. The determination of the tensile strength of the abrasive paper is carried out in accordance with GOST 13525.1, except for paragraphs. 3.1 and 4.1 at ambient temperature. Limit deviations of the dimensions of the test pieces shall be ± 1.0 mm.

(Modified edition, Amendment N 2).

4.9. Samples for control according to PP. 4.1-4.8 is taken from any place on the roll, at least 10 mm from the end of the roll or edges. The value of indicators for PP. 4.3 and 4.5-4.8 are taken as the arithmetic mean of the three definitions.

5. Marking, packaging, transportation and storage

5.1. On the non-working surface of the sandpaper roll, every (235 ± 20) mm in the longitudinal direction and every (200 ± 20) mm in the transverse directions should be applied:

conventional designation (except for the type and indication of the type of the working layer);

batch number.

Notes:

1. When using a mixture of abrasives, mark the grade of the main abrasive in the conventional designation; when using a mixture of grains, mark the main grain.

2. By agreement with the consumer, the dimensions of the roll may not be applied.

(Modified edition, Amendments N 2, 3).

5.2. Bundle marking:

skin glue - M;

combined ligament - K.

5.3. Winding the sanding paper into rolls should be even and dense, with the working layer outward, not allowing the formation of wrinkles, folds and creases.

The end surface should be flat, the projections of the roll edges up to 1250 mm wide should not exceed 5 mm, over 1250 mm wide - 10 mm.

(Modified edition, Amendment N 3).

5.4. Each roll of sanding paper should be wrapped with a double layer of paper in accordance with GOST 18277, GOST 2228 or GOST 10127.

The roll should be glued at the seam. Layers of wrapping paper should cover the ends of the roll and ensure its safety during transportation.

5.5. (Deleted, Amendment No. 3).

5.6. Each packaged roll must be labeled or stamped with the following information:

manufacturer's trademark;

symbol;

date of issue and batch number;

technical control stamp;

the image of the State Quality Mark according to NTD for the abrasive skin, which has been appropriated with the State Quality Mark in accordance with the established procedure.

5.7-5.16. (Excluded, Amendment No. 3).

1. The essence of the method

The method is based on determining the mass of organic glass polished with a sample of abrasive skin during the test.

2. Equipment and materials

2.1. Diagram and description of the MI-2 type device - in accordance with GOST 426.

2.2. Samples of abrasive paper with an outer diameter (174 ± 5) mm and a hole diameter (55 ± 3) mm.

2.3. Plates made of organic glass of the TOSN brand - in accordance with GOST 17622.

2.4. Rubber pads 60-80 Shore.

2.5. Adhesive grades BF-2 and BF-4 in accordance with GOST 12172 or other grades that ensure the strength of the connection of plexiglass plates with a rubber gasket - in accordance with the normative and technical documentation.

(Modified edition, Amendment N 2).

3. Preparation for the test

3.1. Stick the plates onto the rubber pads.

3.2. Pre-grind new plexiglass plates under test conditions until traces of wear appear on the entire working surface of the plates, clean from dust and weigh with a tolerance limit of ± 0.01 g.

4. Carrying out the test

4.1. Set the test modes shown in the table.

Grain	Clamping force, N	Processing time, min	The presence of blowing during processing
			Without blowing
			Without blowing
			With blowing
			With blowing

(Modified edition, Rev. N 1, 2).

4.2. Place the abrasive paper to be tested by changing the abrasive paper on the disc after lapping.

4.3. Fix the plexiglass plates in the holders in the same position as when lapping.

4.4. At the end of the test, free the plexiglass plates, remove dust and weigh with a permissible error limit of ± 0.01 g.

5. Processing of test results

5.1. Cutting capacity (Q, g / min) is determined by the formula

where m is the mass of polished organic glass, g;

5 - processing time, min.

UDC 621.921.67.02 1: 006.354 Group G25

UNION STATE STANDARD S S R

SKINS GRINDING PAPER Specifications

Aoiabue paper Specifications

O S P 30 8600

Valid from 01/01/83

This standard applies to paper grinding skins intended for abrasive processing of various materials without cooling or with the use of cutting fluids based on oil, kerosene, yant-spirit

1. TYPES AND SIZES

1 1. The abrasive paper should be made of types;

1 - aphids for machine and manual processing of non-metallic materials (wood, leather, rubber, plastic, etc.);

2 - for machine and manual processing of metals, alloys.

1 2. The abrasive paper should be produced in rolls, the dimensions of which are indicated in table. one.

Table I

Official edition Reprinting prohibited * *

Proiolzhgipi i Li 7L. /

Note. At the request of the consumer additional) Cg: production of rolls with a length of more than 100 m

1.3. The abrasive paper must be made with the following types of working layer:

C - solid;

P - embossed.

1.4. The designs and dimensions of the embossed working layer must correspond to those indicated in the drawing and in table. 2.

Size s, mm

table 2

The angle of inclination of the relief a should be 5 ° -85 °.

1.5. The deviation from parallelism of the forming lines of the relief should be within the tolerance for the relief step.

An example of a symbol for a paper abrasive cloth of type 1, with a continuous working layer C, 1000 mm wide. length 50 m, on paper grade 0-200, from normal electrocorundum grade 15A, grain size 25-N, on skin glue:

1C 1000X50 P2 15A 25-N M GOST 6456-82

2. TECHNICAL REQUIREMENTS

2.1. Abrasive paper shall be manufactured in accordance with the requirements of this standard.

2.2. The abrasive paper should be made from the abrasive materials specified in table. 3.

Table 3

Note. At the request of the consumer, it is allowed to manufacture grinding shk \ rkn jh of other grades of grinding materials or their mixtures.

2 3. For the manufacture of abrasive skins, paper should be used as a basis in accordance with GOST 18277-72, GOST 10127-75 and industry regulatory and technical documentation for paper in accordance with table. 4.

T a b I and l a 4

(Modified edition, Amendment No. 2).

2.4, The abrasive paper should be made from the abrasive materials of the grain sizes indicated in table. 5.

Table 5

	3 rnistsp
F loEHtJt oConi i icHjje	5 K II k P 1 tou N “iiit! ’Ma yu -" 11 MON
P2 W, P4, Po P7, P8, P9. P10, PI

Note According to ac pu scratching, l g t p g eok 'p< тчфо-вапъноп шк\рыг других тернист ос л ей или их смесей

(Modified edition, Amendment No. 3).

2.5. Grinding material must be bonded to the base of the flesh with glue in accordance with GOST 3252-80 or other bonds in accordance with industry regulatory and technical documentation.

Note It is allowed to enter in a bundle! pau ^ i in i ^ u is nni cents

2.6. Grain composition of grinding materials ■ - according to GOST 3647-89.

2 7. (Deleted, Amendment No. 3).

2 7 1. The total area of wrinkles, folds, area

kov without abrasive grains, filled with a binder, should not exceed 0? 5% of the roll area.

Note By agreement with the consumer gel, the total area of the indicated defects is not more than 1% of the roll area.

(Modified edition, Amendment No. 3).

2.7.3. In a roll of sanding paper with a width of up to 1250 mm, edges with a width of more than 10 mm with defects are not allowed, with a width of more than 1250 mm - more than 15 mm.

Example r pie Pa of the working surface of carbide silicon water p electro-rupdiso and shigfovalpo and skins of grain size 6- "U40 lie point glue formations or blotches protruding above the working surface are allowed.

(Modified edition, Amendments No. 1, 2, 3).

2.8. The unevenness of the thickness of the sanding paper should correspond to the values indicated in table. 6.

Table b

2.9 The tensile strength of the sanding paper, depending on the grade of paper, must correspond to the values specified in table. 7.

Table 7

2.10. Coefficient of application of grinding material on the base Df for grinding sandpaper with a relief working layer should be 0.40-0.75.

2.11. The moisture content of the sanding paper should be 3-7%.

2.12. The reduced wear of electrocorundum and glass grinding skins must correspond to the values indicated in table. eight.

Table a 8

Grain	Given 1	INOS FOR T "WHATS
Grain

|] note and not. Given (nchis carbidkremn gg evon i-achach ggpdr-

M! lOTocieii 0-M40 type 1 should be 1.5-7.0, type 2 - 7.0.

(Modified edition, Amendment No. 2).

2.13. The cutting ability of the abrasive paper under the test conditions specified in the mandatory annex 2 must correspond to the values specified in table. 8a.

Table 8 a

	(.11 OS ABOUT IT IS! 11K \]) K! 1, I	m pt ’f 1 m en 1 *
3 КМчТР ЖОр \ Н КЯ О 1	k a p0n i \ p "nshl ii	\| С I I 1 I I if ofl

(Modified edition, Amendments No. 2, 3).

3. RULES OF ACCEPTANCE

3.1. Acceptance inspections and periodic tests should be carried out to verify that the abrasive skins meet the requirements of this slate.

3.2. Acceptance control for compliance with the requirements of paragraphs. 1.2, 2.7.1, 2.7.2 and 2 73 should be exposed to at least 1% of rolls of abrasive paper from the batch, but not less than 3 pieces, per g, 1.4; 1.5; 2.12 and 2.13 - 0.1%, but not less than 3 pcs.

3.1. 3.2. (Modified edition, Amendment No. 2).

3 2.1. The batch must consist of 1b of abrasive skins: g od-biSh.characteristics, prepared for one shift and simultaneously presented for acceptance on one document.

3.3. If, during the acceptance control, it was found that it did not meet the requirements of the standard more than according to the controllable indication, then the batch is not accepted.

(Modified edition, Amendment No. 2).

33 1 If the statutes icho does not meet the requirements of the standard for one of the controlled indicators, then a second control is carried out on a doubled number of rolls of skin

If there are defects in the resampling, the lot is not accepted.

(Introduced additionally, Amendment No. 2).

3.4. Periodic tests should be carried out for products (one of the sizes of the pouches) that have passed the acceptance control (according to clause 3 2), for compliance with the requirements of clauses 2 8 and 2 10 0.5%, but not less than 3 pieces, clauses 2 9 and 2 1 I 0.5% of abrasive skins of 40 grit size; 8, 5 and L \ 40, but not less than 3 pcs., P. 2 9- on all types of bases.

(Modified edition, Amendment No. 2).

3.5. Periodic tests should not be carried out (hedgehog, once a year.

(Modified edition, Amendment No. 3).

4. METHODS OF CONTROL AND TESTING

4.1-4.1.2. (Excluded, Amendment No. 2).

4.2. The dimensions and external defects of the working surface sh nfo-valnon shmrki are measured with a measuring metal line according to GOST 427-75 or a measuring metal roll to a according to GOST 7502-89.

4.2.1. The angle of inclination of the relief is measured with universal measuring instruments or a special template.

4.3. The unevenness of the thickness of the skin is measured in micrometers

type M1 \ (with a tolerance limit of ± 0.01 mm) at a distance of at least 10 mm from the roll edge.

(Modified edition, Amendment No. 2).

4 4. Calculation of the coefficient of application of shfmaterpa ia on the Li base is given in the obligatory Appendix 1.

4.5. To determine the moisture content of the grinding shlrkp, three samples with dimensions of 100XY0 mm are taken, weighed on a technical balance with a tolerance limit of ± 0.01 g. between two successive weighings will not exceed 0.02 g.

The moisture content of the abrasive paper is determined by the difference in masses before and after drying and is calculated as a percentage of the initial mass.

4.6. The reduced wear of the abrasive paper (the ratio of the grain size of the sanding paper to its crumbling) is determined on the K3IJI VNIIASH device by abrasion of the sandpaper on the sandpaper for 2 minutes at a load of 29.4 N.

Two samples of abrasive paper with dimensions 396X50 mm and 520X50 mm are subjected to testing.

The samples are weighed on a technical balance with a tolerance limit of ± 0.05 g.

Notes;

1. Crumbling: l of the sanding paper is equal to the mass of the crumbling working layer in a given time interval under given conditions

2. With reduced wear for grain sizes M63; L150 and M40 in the reader are respectively the numbers 5; 4 and 3.

(Modified edition, Amendment No. 2).

4.7. Method i for determining the cutting ability of the abrasive paper is given in the mandatory Appendix 2.

4.8. The determination of the tensile strength of the abrasive paper is carried out in accordance with GOST 13525.1-79, except for paragraphs. 3.1 and 4.1 at ambient temperature. Limit deviations of specimen sizes for use should be ± 1.0 mm.

(Modified edition, Amendment No. 2).

4.9. Samples for kosh roll according to PP. 4.1-4.8 is taken from any place on the roll, at least 10 mm from the end of the roll or edges. The value is indicative of PP. 4.3 and 4.5-4.8 are taken as the arithmetic mean of the three definitions.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. On the non-working surface of a roll of sanding paper, every (235d 20) mm in the longitudinal and every

(200 ± 20) mm in transverse directions shall be applied:

manufacturer's trademark;

conventional designation (except for the type and indication of the type of the working layer);

batch number.

Notes:

]. When using a mixture of abrasives, in the conventional designation, mark the brand of the mains in feet about shlnfmatsrnal, when using a mixture of asrnist. with gene - to mark the main grain size.

2. By agreement with the consumer, the dimensions of the roll are allowed to be applied

(Modified edition, Amendments No. 2, 3).

5.2. Bundle marking:

flesh adhesives M;

combined ligament - K.

5.3. Winding the sanding paper into rolls should be even and dense, with the working layer outward, not allowing the formation of wrinkles, folds and creases.

The end surface should be flat, the protrusions of the roll edges with a width of up to 1250 mm should not exceed 5 mm, with a width of over 1250 mm - 10 mm.

(Modified edition, Amendment No. 3).

5.4. Each roll of sanding paper should be wrapped with a double layer of paper in accordance with GOST 18277-72, GOST 2228-81 or GOST 10127-75. "

P ^ the bosom should be glued on the joint. The layers of the packaging b / magic should cover the ends of the roll and ensure its safety during transportation.

5.5. (Deleted, Amendment No. 3).

5.6. Each packaged roll must be labeled or stamped with the following information:

manufacturer's trademark; symbol; date of issue and batch number; technical control stamp;

the image of the State Quality Mark according to NTD for the abrasive skin, which has been appropriated with the State Quality Mark in accordance with the established procedure.

5.7-5.16. (Excluded, Amendment No. 3).

5.17. Other requirements for labeling and packaging, as well as transportation and storage - in accordance with GOST 27595-88.

(Introduced additionally, Amendment No. 3).

Sec. 6. (Deleted, Amendment No. 2).

APPENDIX J

75 ^. Rear

CALCULATION OF THE APPLICATION COEFFICIENT OF SHL IFMATERI 4LA N \ BASIC

Coefficient of application of grinding material on the base (/ C h is the ratio of the area of the base with the applied grinding material to its total area) for: versions 1 and 3 is calculated by the formula

/?«== - ,

where a is the width of the relief, md !, t is the step of the relief, mm;

version 2 is calculated according to the formdle

execution 4 is calculated by the formula

(Modified edition, Amendment L6 1).

from: 1 state 6456-32

APPENDIX 2

Oich ^ tslnye

METHOD FOR DETERMINING THE CUTTING ABILITY OF THE GRINDING

1. The essence of the method

Method i based on the determined mass of organic glass sanded with a sample of abrasive paper during the test.

2. Equipment and materials

2.1. Diagram and description of the MI-2 type device - in accordance with GOST 426-77.

2.2. Samples of abrasive paper with an outer diameter (174rb3) mm and a hole diameter (55 ± 3) mm

2.3. Plates made of organic glass of the TOSN brand - in accordance with GOST 17622-72.

2.4. Rubber pads 60 - 80 Shore.

2.5. Adhesive grades BF-2 and BF-4 in accordance with GOST 12172-74 or other grades that ensure the strength of the connection of plexiglass plates with a rubberized gasket, - ■ in accordance with regulatory and technical documentation

(Modified edition, Amendment No. 2).

3. Getting ready to test

3 1. Stick the plates on the rubber pads

3 2. New plates made of organic glass should be preliminarily ground in under test conditions until the appearance of wear deposits on the entire working surface of the tustin, cleaned from dust and weighed with a limit of permissible error

4. Carrying out the test

4.1. Set the test modes indicated in the table

(Modified edition, Amendment No. 1. 2).

4.2. Set the tested reverse gg: ef, z i mon, shdukn, changing the sanding paper on the disk after, moreover, "

4 3. Fix the um organic glass plates in the holders in the same position as when lapping.

4 4 At the end of the test, release the plate and organic glass, clean it from dust and weigh it with a limit of tolerance 2 ^ 0.01 g.

5. Processing of test results

5 1. Cutting capacity (Q g / min) is determined by the formula

where t is the mass of polished organic glass, g;

5- processing time, mi ".

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Machine-Tool and Tool Industry of the USSR

DEVELOPERS

E. I. Ardashev; E. S. Viksman; V. T. Ivashinnikov; N. A. Ilyin; V. A. Kvitko; L.A. Kogan; O. F. Kotlyarov; I. F. Korchmar V. A. Morozov; E. B. Petrosyan; A. A. Pylnee; S. K. Rozin V. A. Rybakov; N. V. Syreishchikova; V. D. Tunikov; V. N. Tyrkov

2. APPROVED AND INTRODUCED INTO EFFECT by the Decree of the USSR State Committee for Standards dated 18.02.S2 No. 735

3. The term of the first inspection is 1992.

Inspection period - 5 years

4. REPLACE GOST 6456-75

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

	P] mc f ^ mie 2
GOST 427- 75
GOST 2228-81
GOST 3252-80
GOST 3647-80
GOST 7502- 89

GOST 12172-74	Pryozhenio 2
GOST 135 (25 1-79
GOST 17622-72	Prnc w ^ nie 2
GOST 18277-72
GOST 27595-88

6. The validity period was extended until 01.01.93 by the Resolution of the State Standard of the USSR dated 04.23.87 No. 1374

7. REPUBLICATION (April 1990) with Amendments No. 1, 2, 3, approved in June 1984, April 1987, July 1989 (IUS 9-84, 8-87, 11-89J

6. The validity period was extended until 01.01.93 by the Resolution of the State Standard of the USSR of 23.04.87 N 1374

7.RESISTS (April 1990) with Amendments N 1, 2, 3, approved in June 1984, April 1987, July 1989 (IUS 9-84, 8-87, 11-89)

This standard applies to abrasive paper intended for abrasive processing of various materials without cooling or using cutting fluids based on oil, kerosene, white spirit.

1. TYPES AND SIZES

1.1. Sandpaper should be made of types:

1 - for machine and manual processing of non-metallic materials (wood, leather, rubber, plastic, etc.);

2 - for machine and manual processing of metals, alloys.

1.2. Sandpaper should be produced in rolls, the dimensions of which are shown in table 1.

Table 1


Grain	Width, mm (pre-dev. ± 3.0)	Length, m (pre-dev. ± 0.5)

	720; 750; 800; 850; 900; 1000
	1250; 1350; 1400

	720; 750; 800; 850; 900


	1250; 1350; 1400
	720; 750; 800; 850; 900

Note. At the request of the consumer, it is allowed to manufacture rolls with a length of more than 100 m.

1.3. The abrasive paper must be made with the following types of working layer:

C - solid;

P - embossed.

1.4. The designs and dimensions of the relief working layer must correspond to those indicated in the drawing and in Table 2.

table 2

Dimensions, mm


Grain	Width,
	Interval	Prev off	Interval	Prev off

The angle of inclination of the relief should be 5 ° -85 °.

1.5. The deviation from parallelism of the forming lines of the relief should be within the tolerance for the relief step.

An example of a conventional designation of a paper abrasive cloth of type 1, with a continuous working layer C, 1000 mm wide, 50 m long, on paper of grade 0-200, from normal electrocorundum grade 15A, grain size 25-N, on flesh glue:

1C 1000X

50 P2 15A 25-N M GOST 6456-82

2. TECHNICAL REQUIREMENTS

2.1. Abrasive paper shall be manufactured in accordance with the requirements of this standard.

2.2. The abrasive paper should be made from the abrasive materials specified in Table 3.

Table 3


Type of abrasive	Grinding material grade
Normal fused alumina	15A; 14A; F14A; 13A; F13A
White fused alumina	25A; 24A; 23A
Alloy electrocorundum	94A; 93A; 92A; 91A; 91A-M and 92A-M
Zirconium alumina
Monocorundum
Green Silicon Carbide
Black silicon carbide	54C; 53C; 51C
Glass

Note. At the request of the consumer, it is allowed to manufacture abrasive skins from other grades of abrasives or their mixtures.

2.3. For the manufacture of abrasive skins, paper should be used as a basis in accordance with GOST 18277-72, GOST 10127-75 and industry-specific regulatory and technical documentation for paper in accordance with Table 4.

Table 4


Paper stamp	Symbol

Note. If the paper does not have an established symbol, it is allowed to indicate its brand in the symbol of the abrasive paper.

(Modified edition, Amendment N 2).

2.4. The abrasive paper should be made from abrasives with the grain sizes indicated in Table 5.

Table 5


Symbol of paper	Grain
	fused alumina grinding materials	monocorundum	silicon carbide
P2; P3; P4; P5; P7; P8; P9; P10; P11

Note. At the request of the consumer, it is allowed to manufacture abrasive skins of other grain sizes or their mixtures.

(Modified edition, Amendment N 3).

2.5. Grinding material must be bonded to the base with flesh glue in accordance with GOST 3252-80 or other bonds in accordance with industry regulatory and technical documentation.

Note. It is allowed to introduce dyes or coloring pigments into the bundle.

2.6. Grain composition of grinding materials - in accordance with GOST 3647-80.

2.7. (Deleted, Amendment No. 3).

2.7.1. On the working surface of the abrasive paper with a continuous working layer, the total area of wrinkles, folds, areas without abrasive grains, filled with a binder, should not exceed 0.5% of the roll area.

Note. By agreement with the consumer, the total area of these defects is not more than 1% of the roll area.

2.7.2. On the working surface of the abrasive cloth with a relief working layer, the total area of defects (merging and non-printing) of the relief layer per 1 m should not exceed 5% of the area of the roll with the applied abrasive material.

(Modified edition, Amendment N 3).

2.7.3. In a roll of sanding paper with a width of up to 1250 mm, edges with a width of more than 10 mm with defects are not allowed, with a width of more than 1250 mm - more than 15 mm.

Note. On the working surface of silicon carbide and electrocorundum abrasive paper of grain size 6-M40, point glue formations or blotches protruding above the working surface are not allowed.

(Changed edition, Rev. N 1, 2, 3).

2.8. The unevenness of the thickness of the sanding paper should correspond to the values indicated in table 6.

Table 6


Grain	Irregularity of thickness, mm, no more

2.9. The tensile strength of the abrasive paper, depending on the grade of paper, must correspond to the values indicated in table 7.

Table 7


Symbol of paper
	longitudinal	transverse

2.10. The coefficient of application of the abrasive to the base for abrasive cloth with a relief working layer should be 0.40-0.75.

2.11. The moisture content of the sanding paper should be 3-7%.

2.12. The reduced wear of alumina and glass abrasive skins should correspond to the values indicated in table 8.

Table 8


Grain	Reduced wear for types

Note. Reduced wear of silicon carbide abrasive skin with grit size 6-M40 type 1 should be 1.5-7.0; type 2 - St. 7.0.

(Modified edition, Amendment N 2).

2.13. The cutting ability of the abrasive paper under the test conditions specified in the mandatory annex 2 shall correspond to the values specified in table 8a.

Table 8a


Grain	Cutting capacity of the skin, g / min, not less
	electrocorundum	silicon carbide	glass

(Modified edition, Amendments N 2, 3).

3. RULES OF ACCEPTANCE

3.1. Acceptance inspection and periodic testing should be carried out to control the conformity of the abrasive paper with the requirements of this standard.

3.2. Acceptance control for compliance with the requirements of clauses 1.2, 2.7.1, 2.7.2 and 2.7.3 must be subjected to at least 1% of sandpaper rolls from the batch, but not less than 3 pieces, according to clauses 1.4; 1.5; 2.12 and 2.13 - 0.1%, but not less than 3 pcs.

3.1, 3.2. (Modified edition, Amendment N 2).

3.2.1. A batch should consist of a sanding paper of one characteristic, made in one shift and simultaneously presented for acceptance on one document.

3.3. If, during acceptance control, non-compliance with the requirements of the standard for more than one controlled indicator is established, then the batch is not accepted.

(Modified edition, Amendment N 2).

3.3.1. If a discrepancy with the requirements of the standard for one of the monitored indicators is established, then a second control is carried out on a doubled number of rolls of skin.

If there are defects in the resampling, the lot is not accepted.

(Introduced additionally, Rev. N 2).

3.4. Products (one of the roll sizes) that have passed acceptance control (according to clause 3.2) for compliance with the requirements of clauses 2.8 and 2.10 0.5%, but not less than 3 pcs., Clauses 2.9 and 2.11 0.5 % rolls of 40 grit sandpaper; eight; 5 and M40, but not less than 3 pcs., Clause 2.9 - on all types of bases.

(Modified edition, Amendment N 2).

3.5. Periodic tests should be carried out at least once a year.

(Modified edition, Amendment N 3).

4. METHODS OF CONTROL AND TESTING

4.1-4.1.2. (Excluded, Rev. N 2).

4.2. The dimensions and external defects of the working surface of the grinding skin are measured with a measuring metal ruler in accordance with GOST 427-75 or a measuring metal tape in accordance with GOST 7502-89.

4.2.1. The angle of inclination of the relief is measured with universal measuring instruments or a special template.

4.3. The unevenness of the thickness of the skin is measured with a micrometer of the MK type (with a tolerance limit of ± 0.01 mm) at a distance of at least 10 mm from the edge of the roll.

(Modified edition, Amendment N 2).

4.4. The calculation of the coefficient of application of grinding material to the base is given in the mandatory Appendix 1.

4.5. To determine the moisture content of the sanding skin, three samples of 100x100 mm are taken, weighed on a technical balance with a tolerance limit of ± 0.01 g. Samples of the sanding skin are placed in an oven and dried at a temperature of (100 ± 5) ° С until between two successive weighings will not exceed 0.02 g.

The moisture content of the abrasive paper is determined by the difference in masses before and after drying and is calculated as a percentage of the initial mass.

4.6. The reduced wear of the abrasive skin (the ratio of the grain size of the sanding skin to its crumbling) is determined on the VNIIASh KZSH device by abrasion of the skin on the skin for 2 minutes at a load of 29.4 N.

The test is carried out on two samples of abrasive paper with dimensions of 395x50 mm and 520x50 mm.

The samples are weighed on a technical balance with a tolerance limit of ± 0.05 g.

Notes:

1. The crumbling capacity of the abrasive skin is equal to the mass of the crumbling working layer at a given time interval under given conditions.

2. When calculating the reduced wear for grain sizes M63; M50 and M40 in the numerator are taken, respectively, the numbers 5; 4 and 3.

(Modified edition, Amendment N 2).

4.7. The method for determining the cutting ability of the abrasive paper is given in the mandatory Appendix 2.

4.8. The determination of the tensile strength of the abrasive paper is carried out in accordance with GOST 13525.1-79, except for clauses 3.1 and 4.1 at ambient temperature. Limit deviations of the dimensions of the test pieces shall be ± 1.0 mm.

(Modified edition, Amendment N 2).

4.9. Samples for control according to clauses 4.1-4.8 are taken from any place on the roll, at least 10 mm from the end of the roll or edges. The value of the indicators in clauses 4.3 and 4.5-4.8 is taken as the arithmetic mean of three definitions.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. On the non-working surface of the sandpaper roll, every (235 ± 20) mm in the longitudinal direction and every (200 ± 20) mm in the transverse directions should be applied:

conventional designation (except for the type and indication of the type of the working layer);

batch number.

Notes:

1. When using a mixture of abrasives, mark the grade of the main abrasive in the conventional designation; when using a mixture of grains, mark the main grain.

2. By agreement with the consumer, the dimensions of the roll may not be applied.

(Modified edition, Amendments N 2, 3).

5.2. Bundle marking:

skin glue - M;

combined ligament - K.

5.3. Winding the sanding paper into rolls should be even and dense, with the working layer outward, not allowing the formation of wrinkles, folds and creases.

The end surface should be flat, the projections of the roll edges up to 1250 mm wide should not exceed 5 mm, over 1250 mm wide - 10 mm.

(Modified edition, Amendment N 3).

5.4. Each roll of sanding paper should be wrapped with a double layer of paper in accordance with GOST 18277-72, GOST 2228-81 or GOST 10127-75.

The roll should be glued at the seam. Layers of wrapping paper should cover the ends of the roll and ensure its safety during transportation.

5.5. (Deleted, Amendment No. 3).

5.6. Each packaged roll must be labeled or stamped with the following information:

manufacturer's trademark;

symbol;

date of issue and batch number;

technical control stamp;

the image of the State Quality Mark according to NTD for the abrasive skin, which has been appropriated with the State Quality Mark in accordance with the established procedure.

5.7-5.16. (Excluded, Amendment No. 3).

5.17. Other requirements for labeling and packaging, as well as transportation and storage - in accordance with GOST 27595-88.

(Introduced additionally, Amendment No. 3).

Section 6. (Deleted, Rev. N 2).

APPENDIX 1 (mandatory). CALCULATION OF THE APPLICATION RATIO OF GRINDING MATERIAL ON THE BASE

ANNEX 1
Mandatory

Coefficient of application of grinding material on the base (- the ratio of the area of the base with the applied grinding material to its total area) for:

versions 1 and 3 is calculated by the formula

where is the width of the relief, mm;

Relief step, mm;

version 2 is calculated by the formula

execution 4 is calculated by the formula

(Modified edition, Amendment N 1).

APPENDIX 2 (mandatory). METHOD FOR DETERMINING THE CUTTING ABILITY OF A GRINDING SKIN

APPENDIX 2
Mandatory

1. The essence of the method

The method is based on determining the mass of organic glass polished with a sample of abrasive skin during the test.

2. Equipment and materials

2.1. Diagram and description of the MI-2 type device - in accordance with GOST 426-77.

2.2. Samples of abrasive paper with an outer diameter (174 ± 5) mm and a hole diameter (55 ± 3) mm.

2.3. Plates made of organic glass of the TOSN brand - in accordance with GOST 17622-72.

2.4. Rubber pads 60-80 Shore.

2.5. Adhesive grades BF-2 and BF-4 in accordance with GOST 12172-74 or other grades that ensure the strength of the connection of plexiglass plates with a rubber gasket - in accordance with regulatory and technical documentation.

(Modified edition, Amendment N 2).

3. Preparation for the test

3.1. Stick the plates onto the rubber pads.

3.2. Pre-grind new plexiglass plates under test conditions until traces of wear appear on the entire working surface of the plates, clean from dust and weigh with a tolerance limit of ± 0.01 g.

4. Carrying out the test

4.1. Set the test modes shown in the table.


Grain	Clamping force, N	Processing time, min	The presence of blowing during processing
			Without blowing

			With blowing

(Modified edition, Rev. N 1, 2).

4.2. Place the abrasive paper to be tested by changing the abrasive paper on the disc after lapping.

4.3. Fix the plexiglass plates in the holders in the same position as when lapping.

4.4. At the end of the test, free the plexiglass plates, remove dust and weigh with a permissible error limit of ± 0.01 g.

5. Processing of test results

5.1. Cutting capacity (g / min) is determined by the formula

where is the mass of polished organic glass, g;

5 - processing time, min.

Electronic text of the document
prepared by JSC "Kodeks" and verified by:
official publication
Sanding cloth and paper.
Specifications: Sat. GOSTs. -
Moscow: Standards Publishing House, 1990

Approved and put into effect

By the decree of the USSR State Standard

STATE STANDARD OF THE UNION OF SSR

SKINS GRINDING PAPER

TECHNICAL CONDITIONS

Abrasive paper. Specifications

GOST 6456-82

Group G25

OKP 39 8600

Validity

INFORMATION DATA

1. Developed and introduced by the USSR Ministry of Machine-Tool and Tool Industry.

Developers: E.I. Ardashev; E.S. Wicksman; V.T. Ivashinnikov; ON THE. Ilyin; V.A. Kvitko; L.A. Kogan; O.F. Kotlyarov; I.F. Tavern; V.A. Morozov; E. B. Petrosyan; A.A. Pylnev; S.K. Rosin; V.A. Rybakov; N.V. Syreishchikova; V.D. Tunics; V.N. Tyrkov.

2. Approved and put into effect by the Resolution of the USSR State Committee for Standards dated 02/18/1982 N 735.

3. The term of the first inspection is 1992.

Inspection period - 5 years.

4. Instead of GOST 6456-75.

5. Reference normative and technical documents

────────────────────────────────────┬─────────────────────────────

Designation of NTD, │Number of paragraph, subparagraph,

────────────────────────────────────┼─────────────────────────────

GOST 426-77 Appendix 2

GOST 427-75│4.2

GOST 2228-81│5.4

GOST 3252-80│2.5

GOST 3647-80│2.6

GOST 7502-89│4.2

GOST 10127-75-2.3; 5.4

GOST 12172-74 Appendix 2

GOST 13525.1-79│4.8

GOST 17622-72 Appendix 2

GOST 18277-72-2.3; 5.4

GOST 27595-88│5.17

6. The validity period was extended until 01.01.1993 by the Decree of the State Standard of the USSR dated 04.23.1987 N 1374.

7. Reissue (April 1990) with Amendments N 1, 2, 3, approved in June 1984, April 1987, July 1989 (IUS 9-84, 8-87, 11-89).

This standard applies to abrasive paper intended for abrasive processing of various materials without cooling or using cutting fluids based on oil, kerosene, white spirit.

1. TYPES AND SIZES

1.1. Sandpaper should be made of types:

1 - for machine and manual processing of non-metallic materials (wood, leather, rubber, plastic, etc.);

2 - for machine and manual processing of metals, alloys.

1.2. Sandpaper should be produced in rolls, the dimensions of which are indicated in table. one.

Table 1

───────────┬────────────────────────────────┬─────────────────────

Granularity Width, mm (pre-dev. +/- 3.0) │ Length, m (pre-dev.

│ 720; 750; 800; 850; 900; 1000│30

40 - 16│1250; 1350; 1400│

───────────┼────────────────────────────────┤

40; 32│1000│

───────────┼────────────────────────────────┼─────────────────────

40 - 16│720; 750; 800; 850; 900│50

───────────┼────────────────────────────────┤

25 - 10│1000│

───────────┼────────────────────────────────┤

12 - M40 │1250; 1350; 1400│

├────────────────────────────────┼─────────────────────

│720; 750; 800; 850; 900│100

───────────┼────────────────────────────────┤

8 - M40 │1000│

Note. At the request of the consumer, it is allowed to manufacture rolls with a length of more than 100 m.

1.3. The abrasive paper must be made with the following types of working layer:

C - solid;

P - embossed.

1.4. The designs and dimensions of the embossed working layer must correspond to those indicated in the drawing and in table. 2.

Execution 1

Execution 2

Execution 3

Execution 4

table 2

Dimensions, mm

─────────────┬────────────────────┬───────────────────────────────

Granularity │Width, a│Pitch, t

├────────────┬───────┼──────────────┬────────────────

│Interval│ Prev │Interval│Prev. off

││ off ││

50 - 40│ 3,0 - 15,0 │+/- 1,0│4,0 - 38,0│+/- 2,0

─────────────┼────────────┤├──────────────┤

32 - 25│ 1,5 - 12,0 ││3,0 - 30,0│

─────────────┼────────────┼───────┼──────────────┼────────────────

20 - 16│ 1,0 - 10,0 │+/- 0,3│2,5 - 25,0│+/- 1,0

─────────────┼────────────┤├──────────────┼────────────────

12 - M40│ 0.5 - 5.0││1.0 - 20.0│ +/- 0.5

The angle of inclination of the relief should be 5 ° - 85 °.

1.5. The deviation from parallelism of the forming lines of the relief should be within the tolerance for the relief step.

An example of a conventional designation of a paper abrasive cloth of type 1, with a continuous working layer C, 1000 mm wide, 50 m long, on paper of grade 0-200, from normal electrocorundum grade 15A, grain size 25-N, on flesh glue:

1C 1000 X 50 P2 15A 25-N M GOST 6456-82

2. TECHNICAL REQUIREMENTS

2.1. Abrasive paper shall be manufactured in accordance with the requirements of this standard.

2.2. The abrasive paper should be made from the abrasive materials specified in table. 3.

Table 3

Type of abrasive Abrasive grade

Normal electrocorundum -15A; 14A; F14A; 13A; F13A

White fused alumina 25A; 24A; 23A

Alloyed alumina-94A; 93A; 92A; 91A; 91A-M and 92A-M

Zirconium alumina -38A

Monokorund-44A; 43A

Green silicon carbide│64C; 63C

Black silicon carbide -54C; 53C; 51C

Glass│71St

Note. At the request of the consumer, it is allowed to manufacture abrasive skins from other grades of abrasives or their mixtures.

Table 4

────────────────┬─────────────────┬─────────────────┬─────────────

Paper grade│Conditional│Paper brand│Conditional

│ designation designation

────────────────┼─────────────────┼─────────────────┼─────────────

0-140│P1│BSh-140│P6

0-200│P2│BSh-200│P7

0-210│P3│BSh-240│P8

0-235│P4│BV-225│P9

0-240│P5│BVK-225│P10

││OV-200│P11

Note. If the paper does not have an established symbol, it is allowed to indicate its brand in the symbol of the abrasive paper.

(Modified edition, Amendment N 2).

2.4. The abrasive paper should be made from abrasives of the grain sizes indicated in table. 5.

Table 5

─────────────┬────────────────────────────────────────────────────

Conditional│Granularity

designation ├──────────────┬───────────┬──────────────┬────── ────

paper│electric corundum- │monocorundum│carbide│glass

│with silicon│

│ sanding materials│││

─────────────┼──────────────┼───────────┼──────────────┼──────────

P2; P3; P4; │50-M40│50 - 6│25-M40│50 - 6

P5; P7; P8; ││││

P9; P10; P11││││

─────────────┼──────────────┤├──────────────┼──────────

P1; P6│25-M40││16-M40│25 - 6

Note. At the request of the consumer, it is allowed to manufacture abrasive skins of other grain sizes or their mixtures.

(Modified edition, Amendment N 3).

2.5. Grinding material must be bonded to the base with flesh glue in accordance with GOST 3252-80 or other bonds in accordance with industry regulatory and technical documentation.

Note. It is allowed to introduce dyes or coloring pigments into the bundle.

2.6. Grain composition of grinding materials - in accordance with GOST 3647-80.

2.7. (Deleted, Amendment No. 3).

Note. By agreement with the consumer, the total area of these defects is not more than 1% of the roll area.

2.7.2. On the working surface of the abrasive paper with a relief working layer, the total area of defects (merging and non-printing) of the relief layer per 1 m2 should not exceed 5% of the area of the roll with the applied abrasive.

(Modified edition, Amendment N 3).

2.7.3. In a roll of sanding paper with a width of up to 1250 mm, edges with a width of more than 10 mm with defects are not allowed, with a width of more than 1250 mm - more than 15 mm.

Note. On the working surface of silicon carbide and electrocorundum abrasive paper of grain size 6-M40, point glue formations or blotches protruding above the working surface are not allowed.

(Changed edition, Rev. N 1, 2, 3).

2.8. The unevenness of the thickness of the sanding paper should correspond to the values indicated in table. 6.

Table 6

────────────────────────────────┬─────────────────────────────────

Grit Thickness unevenness, mm, not

────────────────────────────────┼─────────────────────────────────

M63 - M40│0.06

2.9. The tensile strength of the abrasive paper, depending on the grade of paper, must correspond to the values indicated in table. 7.

Table 7

──────────┬─────────────────────┬───────────┬─────────────────────

Conditional Breaking load, │ Conditional Breaking load,

designation - │Н, not less, in│ designation Н, not less, in

Paper DirectionsPaper Directions

├──────────┬──────────┤├──────────┬──────────

│longitudinal│transverse││longitudinal│transverse

P1│196.0│107.8│P7│225.4│117.6

──────────┼──────────┼──────────┼───────────┼──────────┼──────────

P2│245.0│137.2│P8│274.4│137.2

──────────┼──────────┼──────────┼───────────┼──────────┼──────────

P3│294.0│156.8│P9│401.8│175.5

──────────┤│├───────────┼──────────┼──────────

P4│││P10│372.4│157.0

──────────┼──────────┼──────────┼───────────┼──────────┼──────────

P5│392.0│98.0│P11│225.5│117.6

──────────┼──────────┤│││

P6│176.4││││

2.10. The coefficient of application of the abrasive to the base for abrasive cloth with a relief working layer should be 0.40 - 0.75.

2.11. The moisture content of the sanding paper should be 3 - 7%.

2.12. The reduced wear of electrocorundum and glass grinding skins must correspond to the values indicated in table. eight.

Table 8

─────────────────────┬────────────────────────────────────────────

Grit│Reduced wear for types

├────────────────────┬───────────────────────

─────────────────────┼────────────────────┼───────────────────────

50 - 32│5.0 - 20.0│S. 20.0

25 - 16│4,0 - 15,0│"15,0

12 - 6│2,0 - 11,0│"11,0

5 - M40│1.5 - 9.0│ "9.0

Note. Reduced wear of silicon carbide abrasive skin with grain sizes 6 - М40 type 1 should be 1.5 - 7.0; type 2 - St. 7.0.

(Modified edition, Amendment N 2).

2.13. The cutting ability of the abrasive paper under the test conditions specified in the mandatory Appendix 2 must correspond to the values specified in table. 8a.

Table 8a

───────────────┬──────────────────────────────────────────────────

Granularity│Cutting capacity of the skin, g / min, not less

├─────────────────┬─────────────────┬──────────────

│ electrocorundum silicon carbide │ glass

50│0,422│0,450│0,300

───────────────┼─────────────────┼─────────────────┼──────────────

40│0,300│0,320│0,260

───────────────┤││

───────────────┼─────────────────┼─────────────────┼──────────────

25│0,290│0,300│0,250

───────────────┼─────────────────┼─────────────────┼──────────────

20│0,200│0,220│0,160

───────────────┼─────────────────┼─────────────────┼──────────────

16│0,195│0,210│0,110

───────────────┼─────────────────┼─────────────────┼──────────────

12│0,187│0,205│0,080

───────────────┼─────────────────┼─────────────────┼──────────────

10│0,176│0,200│0,070

───────────────┼─────────────────┼─────────────────┼──────────────

8│0,151│0,195│0,060

───────────────┼─────────────────┼─────────────────┼──────────────

6│0,100│0,192│-

5│0,079│-│

───────────────┼─────────────────┤│

───────────────┼─────────────────┼─────────────────┤

M63│0.079│0.066│

───────────────┼─────────────────┼─────────────────┤

M50│0.038│0.025│

───────────────┼─────────────────┼─────────────────┤

M40│0.014│0.021│

(Modified edition, Amendments N 2, 3).

3. RULES OF ACCEPTANCE

3.1. Acceptance inspection and periodic testing should be carried out to control the conformity of the abrasive paper with the requirements of this standard.

3.1, 3.2. (Modified edition, Amendment N 2).

3.2.1. A batch should consist of a sanding paper of one characteristic, made in one shift and simultaneously presented for acceptance on one document.

3.3. If, during acceptance control, non-compliance with the requirements of the standard for more than one controlled indicator is established, then the batch is not accepted.

(Modified edition, Amendment N 2).

3.3.1. If a discrepancy with the requirements of the standard for one of the monitored indicators is established, then a second control is carried out on a doubled number of rolls of skin.

If there are defects in the resampling, the lot is not accepted.

(Introduced additionally, Rev. N 2).

(Modified edition, Amendment N 2).

3.5. Periodic tests should be carried out at least once a year.

(Modified edition, Amendment N 3).

4. METHODS OF CONTROL AND TESTING

4.1 - 4.1.2. (Excluded, Rev. N 2).

4.2.1. The angle of inclination of the relief is measured with universal measuring instruments or a special template.

4.3. The unevenness of the thickness of the skin is measured with a micrometer of the MK type (with a tolerance limit of +/- 0.01 mm) at a distance of at least 10 mm from the edge of the roll.

(Modified edition, Amendment N 2).

4.4. The calculation of the coefficient of application of grinding material to the base is given in the obligatory Appendix 1.

4.5. To determine the moisture content of the sanding skin, three samples of 100 x 100 mm are taken, weighed on a technical balance with a tolerance limit of +/- 0.01 g. Samples of the sanding skin are placed in an oven and dried at a temperature of (100 +/- 5) ° С until the difference between two successive weighings does not exceed 0.02 g.

The moisture content of the abrasive paper is determined by the difference in masses before and after drying and is calculated as a percentage of the initial mass.

4.6. The reduced wear of the abrasive skin (the ratio of the grain size of the sanding skin to its crumbling) is determined on the KZSH VNIIASh device by abrasion of the skin on the skin for 2 minutes at a load of 29.4 N.

The test is carried out on two samples of abrasive paper with dimensions of 395 x 50 mm and 520 x 50 mm.

The samples are weighed on a technical balance with a tolerance limit of +/- 0.05 g.

Notes. 1. The crumbling capacity of the abrasive skin is equal to the mass of the crumbling working layer at a given time interval under given conditions.

2. When calculating the reduced wear for grain sizes M63; M50 and M40 in the numerator are taken, respectively, the numbers 5; 4 and 3.

(Modified edition, Amendment N 2).

4.7. The method for determining the cutting ability of the abrasive paper is given in the obligatory Appendix 2.

(Modified edition, Amendment N 2).

4.9. Samples for control according to PP. 4.1 - 4.8 is taken from any place on the roll, at least 10 mm from the end of the roll or edges. The value of indicators for PP. 4.3 and 4.5 - 4.8 is taken as the arithmetic mean of the three definitions.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. On the non-working surface of the sandpaper roll, every (235 +/- 20) mm in the longitudinal direction and every (200 +/- 20) mm in the transverse directions should be applied:

conventional designation (except for the type and indication of the type of the working layer);

batch number.

Notes. 1. When using a mixture of abrasives, mark the grade of the main abrasive in the conventional designation; when using a mixture of grains, mark the main grain.

2. By agreement with the consumer, the dimensions of the roll may not be applied.

(Modified edition, Amendments N 2, 3).

5.2. Bundle marking:

skin glue - M;

combined ligament - K.

5.3. Winding the sanding paper into rolls should be even and dense, with the working layer outward, not allowing the formation of wrinkles, folds and creases.

The end surface should be flat, the projections of the roll edges up to 1250 mm wide should not exceed 5 mm, over 1250 mm wide - 10 mm.

(Modified edition, Amendment N 3).

5.4. Each roll of sanding paper should be wrapped with a double layer of paper in accordance with GOST 18277-72, GOST 2228-81 or GOST 10127-75.

The roll should be glued at the seam. Layers of wrapping paper should cover the ends of the roll and ensure its safety during transportation.

5.5. (Deleted, Amendment No. 3).

5.6. Each packaged roll must be labeled or stamped with the following information:

manufacturer's trademark;

symbol;

date of issue and batch number;

technical control stamp;

the image of the State Quality Mark according to NTD for the abrasive skin, which has been appropriated with the State Quality Mark in accordance with the established procedure.

5.7 - 5.16. (Excluded, Amendment No. 3).

5.17. Other requirements for labeling and packaging, as well as transportation and storage - in accordance with GOST 27595-88.

(Introduced additionally, Amendment No. 3).

Sec. 6. (Deleted, Amendment No. 2).

Annex 1

Mandatory

CALCULATION OF THE APPLICATION RATIO OF GRINDING MATERIAL ON THE BASE

Coefficient of application of grinding material on the base (- the ratio of the area of the base with the applied grinding material to its total area) for:

versions 1 and 3 is calculated by the formula

where a is the width of the relief, mm;

t - relief step, mm;

version 2 is calculated by the formula

execution 4 is calculated by the formula

(Modified edition, Amendment N 1).

Appendix 2

Mandatory

METHOD FOR DETERMINING THE CUTTING ABILITY OF A GRINDING SKIN

1. The essence of the method

The method is based on determining the mass of organic glass polished with a sample of abrasive skin during the test.

2. Equipment and materials

2.1. Diagram and description of the MI-2 type device - in accordance with GOST 426-77.

2.2. Samples of sanding paper with an outer diameter (174 +/- 5) mm and a hole diameter (55 +/- 3) mm.

2.3. Plates made of organic glass of the TOSN brand - in accordance with GOST 17622-72.

2.4. Rubber pads 60 - 80 Shore.

(Modified edition, Amendment N 2).

3. Preparation for the test

3.1. Stick the plates onto the rubber pads.

3.2. Pre-grind new plexiglass plates under test conditions until traces of wear appear on the entire working surface of the plates, remove dust and weigh with a tolerance limit of +/- 0.01 g.

4. Carrying out the test

4.1. Set the test modes shown in the table.

───────────────┬─────────────────┬─────────────────┬──────────────

Grit Clamping force, N│ Processing time, │ Presence of blowing

││min│ during processing

───────────────┼─────────────────┼─────────────────┼──────────────

80 - 50│98.0│5│Without blowing

40 - 25│72,5│├──────────────

20 - 6│49.0││With blowing

5 - M40│25.5││

(Modified edition, Rev. N 1, 2).

4.2. Place the abrasive paper to be tested by changing the abrasive paper on the disc after lapping.