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GOST 3722-81

(ST SEV 1990-79)

Group G16

STATE STANDARD OF THE UNION OF THE SSR

Rolling bearings

BALLOONS

Specifications

rolling bearings. balls.

Specifications

Introduction date 1983-07-01

INTRODUCED BY Decree of the USSR State Committee for Standards dated April 17, 1981 N 2013

Checked in 1987. By Decree of the State Standard of the USSR dated 12/17/87 N 4583, the validity period was extended until 07/01/93 *

* The limitation of the validity period was removed by the Decree of the State Standard of Russia of 27.0792 N 781. (IUS N 10, 1992).

INSTEAD OF GOST 3722-60

REPUBLICATION. January 1990

This European Standard applies to balls used in rolling bearings and as separate parts.

Terms, symbols and explanations for them are given in Appendix 1.

The standard fully complies with ST SEV 1990-79.

1. BASIC DIMENSIONS

1.1. The dimensions and weight of the balls must correspond to the values ​​indicated in Table 1.

Table 1

Nominal ball diameter		Weight 1000 pieces, kg

Notes:

1. Dimensions of nominal ball diameters in millimeters given in parentheses are not recommended for use.

2. Dimensions of nominal ball diameters in inches are given for reference only.

3. The mass of the balls is calculated at a steel density of 7.85 kg/dm.

1.2. The symbol for balls used as separate parts shall consist of the nominal diameter in millimeters, the degree of accuracy and the designation of this standard.

The symbol for balls used in rolling bearings is supplemented by the letter H, which is placed before the designation of the nominal diameter.

The symbol for balls that are not sorted by diameter is supplemented with the letter B before the designation of the nominal diameter.

Examples of symbols for balls used as separate parts, with a nominal diameter of 5.8 mm, degree of accuracy 10:

Ball 5.8-10 GOST 3722-81

The same for balls used in rolling bearings with a nominal diameter of 3.969 mm, degree of accuracy 5:

Ball H 3.969-5 GOST 3722-81

The same, balls, not sorted by diameter, with a nominal diameter of 9.525 mm, degree of accuracy 100:

Ball B 9.525-100 GOST 3722-81

1.3. At the request of the consumer, it is allowed to manufacture balls with sizes different from those indicated in Table 1, provided that the remaining requirements of this standard are met.

2. TECHNICAL REQUIREMENTS

2.1. Balls must be manufactured in accordance with the requirements of this standard according to working drawings approved in the prescribed manner.

2.2. The balls must be made of steel according to GOST 801-78 and GOST 4727-83. At the request of the consumer, it is allowed to manufacture balls from other steel grades.

2.3. The balls must be heat treated:

to hardness - with a diameter of up to 45 mm;

to hardness - with a diameter of more than 45 mm.

2.4. 10 degrees of accuracy of the balls are set, indicated in decreasing order of accuracy by numbers: 3; five; 10; 16; twenty; 28; 40; 60; one hundred; 200.

2.5. The deviation of the average diameter, the difference in the size of the balls in diameter in the batch, the variability of a single diameter, the deviation from the spherical shape (excluding waviness) and the surface roughness should not exceed the values ​​\u200b\u200bspecified in Table 2.

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STATE STANDARD OF THE UNION OF THE USSR
Rolling bearings
BALLOONS
GOST 3722-81
ST SEV 1990-79)

This European Standard applies to balls used in rolling bearings and as separate parts.

The standard fully complies with ST SEV 1990-79.

1. BASIC DIMENSIONS
1.1. The dimensions and weight of the balls must correspond to the values ​​\u200b\u200bspecified in Table. one.

Nominal ball diameter Dw		Weight 1000 pcs., kg ~	Nominal ball diameter Dw		Weight 1000 pcs., kg ~	Nominal ball diameter Dw		Weight 1000 pcs., kg ~	Nominal ball diameter Dw		Weight 1000 pcs., kg ~
mm	Inch		mm	Inch		mm	Inch		mm	Inch
0,250	-	0,00008	6,000	-	0,887	19,000	-	28,2	45,000	-	374
0,300	-	0,00011	6,350	1/4	1,050	19,050	3/4	28,4	46,038	1 13/16	401
0,360	-	0,00016	6,500	-	1,130	19,844	25/32	32,1	47,625	1 7/8	444
0,397	1/64	0,00025	6,747	17/64	1,260	20,000	-	32,9	49,212	1 15/16	490
0,400	-	0,00026	7,000	-	1,410	20,638	13/16	36,1	50,000	-	514
0,500	-	0,00051	7,144	9/32	1,500	21,000	-	38,0	50,800	2	539
0,508	-	0,00054	7,500	-	1,730	21,431	27/32	40,4	52,388	2 1/16	591
0,600	-	0,00089	7,541	19/64	1,760	22,000	-	43,8	53,975	2 1/8	646
0,635	-	0,00105	7,938	5/16	2,060	22,225	7/8	45,1	55,000	-	684
0,680	-	0,00129	8,000	-	2,100	23,000	-	50,0	57,150	2 1/4	767
0,700	-	0,00141	8,334	-	2,380	23,019	29/32	50,1	60,000	-	887
0,794	1/32	0,00206	8,500	-	2,520	23,812	15/16	55,5	60,325	2 3/8	902
0,800	-	0,00210	8,731	11/32	2,730	24,000	-	56,8	61,912	2 7/16	975
0,840	-	0,00243	9,000	-	3,000	24,606	31/32	61,2	63,500	2 1/2	1052
0,850	-	0,00252	9,128	23/64	3,120	25,000	-	64,2	65,000	-	1128
1,000	-	0,00411	9,525	3/8	3,550	25,400	1	67,3	66,675	2 5/8	1218
1,191	3/64	0,00694	9,922	25/64	4,010	26,000	-	72,2	69,850	2 3/4	1400
1,200	-	0,00710	10,000	-	4,110	26,194	1 1/32	73,8	73,025	2 7/8	1600
1,300	-	0,00903	10,319	13/32	4,510	26,988	1 1/16	80,8	75,000	-	1733
1,500	-	0,0139	10,716	27/64	5,060	27,781	1 3/32	88,1	76,200	3	1818
1,588	1/16	0,0164	11,000	-	5,470	28,000	-	90,2	79,375	3 1/8	2054
1,984	5/64	0,0321	11,112	7/16	5,640	28,570	1 1/8	95,8	80,000	-	2103
2,000	-	0,0329	11,500	-	6,250	30,000	-	111	82,550	3 1/4	2311
2,381	3/32	0,0554	11,509	29/64	6,260	30,162	1 3/16	113	85,725	3 3/8	2588
2,500	-	0,0642	11,906	15/32	6,930	31,750	1 1/4	132	88,900	3 1/2	2886
2,778	7/64	0,0881	12,000	-	7,100	32,000	-	135	90,000	-	2995
3,000	-	0,111	12,303	31/64	7,650	32,544	1 9/32	142	92,075	3 5/8	3207
3,175	1/8	0,132	12,700	1/2	8,420	33,338	1 5/16	152	95,250	3 3/4	3550
3,500	-	0,176	13,000	-	9,030	34,000	-	162	98,425	3 7/8	3917
3,572	9/64	0,187	13,494	17/32	10,100	34,925	1 3/8	175	100,000	-	4108
3,969	5/32	0,257	14,000	-	11,300	35,000	-	176	101,600	4	4308
4,000	-	0,263	14,288	9/16	12,000	35,719	1 13/32	187	104,775	4 1/8	4725
4,366	11/64	0,342	15,000	-	13,900	36,000	-	192	107,950	4 1/4	5168
4,500	-	0,374	15,081	19/32	14,100	36,512	1 7/16	200	108,000	-	5175
4,763	3/16	0,444	15,875	5/8	16,400	38,000	-	225	110,000	-	5468
5,000	-	0,514	16,000	-	16,800	38,100	1 1/2	227	111,125	4 3/8	5637
5,159	13/16	0,564	16,669	21/32	19,000	39,688	1 9/16	257	114,300	4 1/2	6134
5,500	-	0,684	17,000	-	20,200	40,000	-	263	120,000	-	7100
5,556	7/32	0,705	17,462	11/16	21,900	41,275	1 5/8	289	127,000	-	8415
5,800	-	0,802	18,000	-	24,000	42,862	1 11/16	324	150,000	-	13865
5,953	15/64	0,867	18,256	23/32	25,000	44,450	1 3/4	361

1.2. The symbol for balls used as separate parts shall consist of the nominal diameter in millimeters, the degree of accuracy and the designation of this standard. The symbol for balls used in rolling bearings is supplemented by the letter H, placed before the designation of the nominal diameter. The symbol for balls that are not sorted by diameter is supplemented with the letter B before the designation of the nominal diameter. The deviation of the average diameter, the difference in the size of the balls in diameter in the batch, the variability of a single diameter, the deviation from the spherical shape (excluding waviness) and the surface roughness should not exceed the values ​​\u200b\u200bspecified in the table.

Degree of accuracy	Nominal ball diameter Dw, mm	Deviation of the average diameter of the balls used as individual parts Dwm	Different sizes of balls by diameter in a batch of VDwL	Single diameter variation VDws	Deviation from the spherical norm	Surface roughness
						Ra	Rz
		micron, no more
3	0.25 to 12	±5	0,13	0,08	0,08	--	0,100
5	» 0.25 » 12	±5	0,25	0,13	0,13	0,020	0,100
10	» 0.25 » 25	±9	0,50	0,25	0,25	0,020	0,100
16	» 0.25 » 25	± 10	0,80	0,40	0,40	0,032	0,160
20	» 0.25 » 38	± 10	1,00	0,50	0,50	0,040	0,200
28	» 0.25 » 38	± 12	1,40	0,70	0,70	0,050	0,250
40	» 0.25 » 50	±16	2,00	1,00	1,00	0,080	0,400
60	» 0.25 » 80	± 30	3,00	1,50	1,50	0,100	0,500
100	» 0.25 » 120	±40	5,00	2,50	2,50	0,125	0,600
200	» 0.25 » 150	± 60	10,00	5,00	5,00	0,200	0,800

Notes:
1. Roughness values ​​Rz are set for balls of the 3rd degree of accuracy of all diameters; for balls of other degrees of accuracy at Dw< 3 мм.
2. At the request of the consumer, it is allowed to manufacture balls used as separate parts with limit deviations that differ from those indicated in the table.

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STATE STANDARD

UNION SSR

ROLLING BEARINGS

BALLOONS

When checking on a round gauge, measurements should be carried out in at least two mutually perpendicular planes. The results obtained should not exceed the values ​​indicated in Table. 2.

It is allowed to control sphericity in a prism. The obtained measurement results should not be more than those indicated in Table. 2 of this standard.

In case of disagreement in determining deviations from sphericity, the arbitration method is to check on an instrument that shows actual values.

4.7. Identification of spots of secondary hardening and secondary tempering is carried out by cold etching in a solution of nitric acid.

After etching, the balls should not have clearly defined spots of secondary hardening or secondary tempering.

4.8. The test balls for destruction is carried out according to the scheme shown in the drawing.

4.9. The compression test of the balls is carried out between steel pillows with a hardness of HRC 58...63 with spherical recesses. The sphere of depression is outlined by a radius equal to 2/3 of the diameter of the ball. Holding time 30 s. The balls must be compressed in three mutually perpendicular directions. A compression test is carried out before the final machining balls.

4.10. The surface roughness of the balls is controlled by measurement on instruments. It is allowed to control the roughness by comparison with working samples.

4.11. The control of nicks, dents and scratches is carried out with the naked eye in diffused light by comparison with samples.

5. MARKING, PACKAGING, TRANSPORT AND STORAGE

5.1. To protect against corrosion, the balls must be preserved and stored in conditions corresponding to GOST

It is allowed, at the request of the consumer, to use conservation methods and storage conditions that are not provided for by GOST

5.2. Balls of the same batch, except for those intended for own * production after conservation, are packed in a box

GOST 3722-81

cardboard boxes lined with paraffin paper or polyethylene film, or plastic boxes, and then in boxes according to GOST 16148-79. It is allowed to use other types of transport containers that ensure the safety of the inner packaging, do not allow droplet-liquid moisture to get inside and do not emit corrosive substances.

The boxes must be lined from the inside with bituminous paper according to GOST 515-77 or polymer film according to GOST 16272-79, GOST 10354-73 or other materials (paper, film, etc.) that ensure the safety of the balls.

5.3. Balls weighing more than 1.3 kg after preservation are wrapped in a moisture-proof material and packed in individual boxes.

Balls with a diameter of up to 1.5 mm after conservation are packed in plastic test tubes, and then in boxes. It is allowed to pack test tubes in one box and in one box boxes with balls of the same nominal diameter, one degree of accuracy, but with different deviations of the average diameter of the balls.

Balls with a diameter of more than 20 mm are allowed to be packed in boxes without boxes.

The packing of the balls in a box or test tube must be tight so that they do not move during transportation.

5.4. The weight of the box with packed balls must not exceed 50 kg. Boxes after driving must be busbars with a steel strip.

5.5. In each box or test tube with balls put a passport, which should indicate:

conditional designation of balls;

average deviation from the nominal diameter of the balls in pairs

TII AD«,mL i

mass or number of balls;

conservation date (month, year);

5.6. Boxes after laying the balls in them can be pasted over with a parcel post. The following must be indicated on the parcel or box:

name or trademark manufacturer;

conditional designation of balls;

average deviation from the nominal diameter of balls in lot A DwmL ;

mass or number of balls; conservation date (month, year).

Note. It is allowed to replace the parcel with other packaging means that ensure the safety of the package. In this case, the data given in clause 5.5 must be applied on the box or on the label.

5.7. Packing boxes in a box should be tight, excluding their movement during transportation.

The voids in the box should be filled with paper or cardboard waste.

5.8. Each box must contain a passport, which indicates:

name or trademark of the manufacturer; conditional designation of balls; mass or number of balls; conservation date (month, year);

stamp technical control manufacturer.

5.9. Transport marking (basic, additional, information inscriptions and handling signs) must be applied to the label or directly to the box in accordance with GOST 14192-77.

Additionally, you should specify:

name or trademark of the manufacturer; conditional designation of balls; the number or mass of balls;

manipulation signs: "Caution, fragile!" "Afraid of dampness" according to GOST 14192-77.

5.10. Balls should be transported by means that ensure their safety and protection from atmospheric precipitation. It is allowed to transport balls in packages from boxes stacked according to a certain scheme on a pallet or without it, covered with a metal tape or other material that ensures the package shape remains unchanged during transportation.

5.11. At the consumer, the balls should be stored in the warehouse only in the packaging of the manufacturer. The warehouse premises must have a constant temperature (20±5)°C and a relative humidity of not more than 70%.

b. MANUFACTURER'S WARRANTY

6.1. The manufacturer must ensure that the balls comply with the requirements of this standard, subject to the conditions of transportation and storage.

6.2. Guarantee period storage of balls - 24 months from the moment of production.

APPENDIX 1 Reference

TERMS USED IN THIS STANDARD AND EXPLANATIONS TO THEM

Designation Explanation Nominal shaft diameter Ball diameter, relative but which determine the diameters and which also serves as the starting point for deviations Single ball diameter According to ST SEV 1472-78 Average ball diameter According to ST SEV 1472-78 According to ST SEV 1472-78 ball diameter According to ST SEV 1472-78 Deviation from spherical ball shape According to ST SEV 1472-78 Average diameter deviation ball ra Degree of accuracy A certain combination of different sizes, deviations from the spherical shape, diameter variability and surface roughness of the balls Balloon Party A certain number of balls of the same nominal diameter, degree of accuracy and material, manufactured under the same conditions and presented for acceptance at the same time Average ball diameter in Arithmetic mean value of the largest and smallest average diameters of the balls in the batch Average deviation from nominal Algebraic difference ball diameter in between the average diameter of the ricks per batch and nominal ball diameter According to ST SEV 1472-78 Different sizes of balls by diameter per batch

Described sphere

APPENDIX 2 Mandatory

NOMOGRAMS OF BREAKING LOADS

Ball diameter, mm

Lio Sharin meter, mm

Editor I. M. Uvarova Technical editor O. N. Nikitina Proofreader G. M. Frolova

Handed over in 07.05.81 Enc. Tire 30000 Price 5 kop.

Orlen "Badge of Honor" Publishing house of standards. 123557. Moscow. Novopresnensky per., 3 Type. "Moscow Printer" Moscow, Lyalin per., 6 Zak 793

Group G16

UDC 621.82271:006.354

STATE STANDARD OF THE UNION OF THE SSR

gost

Rolling bearings A A

(ST SEV 1990-79)

balls 3722-81

Specifications

rolling bearings. balls.

technical requirements

OKP 46 9100 GOST 3722-60

By the Decree of the USSR State Committee for Standards dated April 17, 1981 No. 2013, the validity period is set

from 01.07.1983 to 01.07.1988

Non-compliance with the standard is punishable by law

This European Standard applies to balls used in rolling bearings and as separate parts.

Terms, symbols and explanations for them are given in reference Appendix 1.

The standard fully complies with ST SEV 1990-79.

1. BASIC DIMENSIONS

1.1. The dimensions and weight of the balls must correspond to the values ​​\u200b\u200bspecified in Table. one.

Table 1

Nominal shaft diameter Weight 1000 pcs. Nominal ball diameter Weight IQQQ PCS, 0,400 0,500 0,508 , 0,600

Copyright © 1981 Standards Publishing House

Official edition

Continuation of the table. one

Nominal ball diameter Weight 1000 pcs. Nominal ball diameter Weight 1000 pcs.,

Continuation of the table. one

Nominal ball diameter Weight 1000 pcs., Nominal ball diameter Weight 1000 pieces |

Notes: 1. Dimensions of nominal ball diameters in millimeters given in parentheses are not recommended for use. 2. Dimensions of nominal ball diameters in inches are given for reference only. 3. The mass of the balls is calculated at a steel density of 7.85 kg/dm 3 .

1.2. The symbol for balls used as separate parts shall consist of the nominal diameter in millimeters, the degree of accuracy and the designation of this standard.

The symbol for balls used in rolling bearings is supplemented by the letter H, which is placed before the designation of the nominal diameter.

GOST 3722-81

The symbol for balls that are not sorted by diameter is supplemented with the letter B before the designation of the nominal diameter.

Examples of symbols for balls used as separate parts, with a nominal diameter of 5.8 mm, degree of accuracy 10:

The same for balls used in rolling bearings with a nominal diameter of 3.969 mm, degree of accuracy 5:

The same, balls, not sorted by diameter, with a nominal diameter of 9.525 mm, degree of accuracy 100:

1.3. At the request of the consumer, it is allowed to manufacture balls with sizes that differ from those indicated in Table. 1, while meeting the other requirements of this standard.

2. TECHNICAL REQUIREMENTS

2.1. Balls must be manufactured in accordance with the requirements of this standard according to working drawings approved in the prescribed manner.

2.2. The balls must be made of steel according to GOST 801-78 and GOST 4727-67. At the request of the consumer, it is allowed to manufacture balls from other steel grades.

2.3. The balls must be heat treated:

up to hardness HRC 62 ... 66 - with a diameter of up to 45 mm;

up to hardness HRC 60 .. 66 - with a diameter of more than 45 mm.

2.4. 10 degrees of accuracy of the balls are set, indicated in decreasing order of accuracy by numbers: 3; five; 10; 16; twenty; 28; 40; 60; one hundred; 200.

2.5. The deviation of the average diameter, the difference in the size of the balls in diameter in the batch, the variability of a single diameter, the deviation from the spherical shape (excluding waviness) and the surface roughness should not exceed the values ​​\u200b\u200bspecified in Table. 2.

table 2

Nominal ball diameter D w . mm Deviation of the average diameter of the balls used as individual parts Diversity of balls by diameter in a batch diameter Deviation from spherical shape Sherokhov surfaces micron, no more

Notes:

1. The values ​​of roughness Rr are set for balls of the 3rd degree of accuracy of all diameters: For balls of other degrees of accuracy at D w ^ 3 mm.

2. At the request of the consumer, it is allowed to manufacture balls used in the form of separate parts, with maximum deviations that differ from those indicated in Table. 2.

2.6. The deviations of the average diameter of balls of all degrees of accuracy used in rolling bearings are given in Table. 3.

Table 3

Nominal ball diameter D w . mm Deviations of the average diameter of the balls A D wm > mm - no more

GOST 3722-81

2.7. The balls must not have cracks, corrosion, as well as grinding annealing in the form of spots of secondary hardening and secondary tempering.

Not allowed are nicks, shells, dents and risks visible to the naked eye with a normal level of vision under illumination of 300 lux from a distance of 0.5 m, as well as traces of decarburization detected by cold etching or flaw detection.

2.8. The balls must be demagnetized.

2.9. Balls with a diameter of 3 to 45 mm must pass the breaking load test.

Breaking loads when testing balls must be not less than those indicated in Table. 4 for the diameters given in it; for balls with other nominal diameters, the breaking loads must not be less than those specified in mandatory Appendix 2.

Table 4

Nominal Nominal ball diameter D w , mm Breaking load, N (kgf), not less than

2.10. Balls larger than 45 mm in diameter must pass the compression test. The test load in compression and the change in the diameter of the ball under the action of this load, depending on the size of the ball, must correspond to the values ​​\u200b\u200bspecified in Table. five.

Table 5

Nominal ball diameter D Wt mm Difference in sizes of diameters measured before and after compression, µm, no more

3. ACCEPTANCE RULES

3.1. An acceptance inspection should be carried out to verify that the balls comply with the requirements of this standard.

3.2. During acceptance control, the balls are checked for compliance with:

item 2.2-0.03% of the batch (for balls with a diameter of up to 45 mm - at least 5 pcs. and not more than 10 pcs.);

for balls with a diameter over 45 mm - at least 2 pcs. and no more than 5 pieces;

sq. 2.4 and 2.6-0.1% of the batch, but not less than 5 pcs. and no more than 50 pieces;

item 2.7-0.03% of the lot, but not less than 5 pcs. and no more than 50 pieces;

tab. 4-3 pcs. from the party.

3.3. If the balls do not comply with at least one requirement of this standard, a double control of the doubled number of balls taken from the same batch is carried out according to the same parameters.

The results of the re-inspection apply to the entire batch.

4. CONTROL METHODS

4.1. The quality of the heat treatment of the balls is checked by hardness.

4.2. The hardness of balls with a diameter of 5 mm or more is controlled according to GOST 9013-59 on a Rockwell device, scale C, by

GOST 3722-81

indentation of a diamond cone into a spherical surface. The actual hardness of balls with a diameter of 5 to 15.1 mm is determined taking into account the correction for the distorting effect of the curvature of the controlled surface according to Table. 6.

Table b

Relative hardness measured on the surface of the ball on the device Rockwell, C scale, HRC Actual hardness

Note. Actual ball hardness, nominal dimensions which are not shown in Table. 6 is determined by interpolation.

4.3. The hardness of balls with a diameter of less than 5 mm is checked according to the type of fracture for compliance with the standard.

4.4. The hardness of balls with a diameter of 5 to 10 mm is checked at three points, and more than 10 mm - at five points.

4.5. The mean diameter and diameter variability are measured as the ball rotates.

It is allowed to measure the average diameter D wm and the variability of the unit diameter D ws of balls of accuracy degrees 3 and 5 of all diameters and balls of nominal diameters D w ^: 6 mm of other degrees of accuracy without rotation, but at least in three arbitrary positions.

4.6. The measurement of the deviation from the sphericity of the balls is carried out on a device that shows the actual values.