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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces JB/T 10336-2002 Rolling Bearings and Parts - Supplementary Specifications.
In addition to editorial changes, the following main technical changes have been made with respect to JB/T 10336-2002:
——the name of the standard is modified (see the cover and front page of this edition as well as those of 2002 edition);
——the accuracy of matched rolling element is deleted (see Table 1 and Table 6 of 2002 edition);
——as for the bearing assembly of ordinary-grade ball bearing, the requirements for axial runout of its inner and outer rings are improved (see Table 1 of this edition; Table 2 of 2002 edition);
——the actual width deviations of angular contact ball bearings of 7, 8 and 9 diameter series are added (see Table 2);
——the actual height deviations of single-direction and double-direction thrust ball bearings with flat back faces are deleted (see Table 4 of 2002 edition);
——the actual height deviations of single-direction and double-direction cylindrical thrust roller bearings are deleted (see Table 11 of 2002 edition);
——the actual width deviations of Grades 0 and 5 single-row tapered roller bearings with a nominal bore diameter of 250mm~2,500mm are deleted (see Table 12 of 2002 edition).
——some contents having been specified in relevant standards are deleted (see 4.1.1.14, 4.1.1.15, part of 4.1.2.2, 4.1.2.3~4.1.2.6, 4.2.1.4, 4.2.1.12, part of 4.2.2.2, 4.2.2.3 and 4.2.2.4 of 2002 edition);
——the bending strength test of needle roller is deleted (see 4.2.2.5 of 2002 edition);
——the compression test of steel ball is moved into annex (see Annex A; 5.1.2.3 of 2002 edition).
This standard was proposed by China Machinery Industry Federation.
This standard is under the jurisdiction of the National Technical Committee on Rolling Bearing of Standardization Administration of China (SAC/TC 98).
The previous edition of this standard is as follows:
——JB/T 10336-2002.
Rolling Bearings - Supplementary Specifications
1 Scope
This standard specifies the supplementary specifications for general-purpose ball bearing and roller bearing meeting the requirements of GB 273.1-2011, GB 273.2-2006, GB/T 273.3-2015, GB/T 299-2008 and GB/T 300-2008 as well as their parts, and is a supplement to GB/T 307.1-2005, GB/T 307.3-2005 and GB/T 307.4-2012.
This standard is applicable to rolling bearings and their parts.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 307.1-2005 Rolling Bearings - Radial Bearings - Tolerances
GB/T 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods
GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions
GB/T 6930-2002 Rolling Bearings - Vocabulary
GB/T 7811-2015 Rolling Bearings - Symbols for Physical Quantities
JB/T 1255-2014 Rolling Bearings - Parts Made from High-carbon Chromium Bearing Steels - Specifications for Heat Treatment
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 4199-2003 and GB/T 6930-2002 apply.
4 Symbols
For the purpose of this document, the symbols given in GB/T 7811-2015 and the following apply.
ΔTs: the actual width deviation of angular contact ball bearing
ΔT3s: the actual width deviation of double-row tapered roller bearing
ΔT4s: the actual width deviation of four-row tapered roller bearing
5 Specifications
5.1 Ball bearing
5.1.1 Finished bearing
5.1.1.1 As for the ordinary-grade and Grade 6 radial and angular contact ball bearings, the axial runout of their inner and outer rings shall not exceed those specified in Table 1 and the measuring methods shall be in accordance with those specified in GB/T 307.2-2005. Where mandrel is used to measure the Sia at outer ring face, the values of ordinary-grade and Grade 6 bearings shall not exceed 10/6 times of values listed in Table 1 and the values of Grades 5 and 4 bearings shall not exceed 10/6 times of values listed in Table 5 and Table 7 of GB/T 307.1-2005.
Table 1 Axial Runout of Inner and Outer Rings of Ball Bearing In: μm
d Sia D Sea
mm Tolerance class mm Tolerance class
> ≤ Ordinary grade Grade 6 > ≤ Ordinary grade Grade 6
max. max.
0.6
2.5
10
18
30
50
80
120
180
250
315
400
500
—
— 2.5
10
18
30
50
80
120
180
250
315
400
500
630
—
— 16
16
16
20
20
24
24
30
30
34
38
44
48
—
— 10
10
10
12
12
15
15
18
18
21
24
27
30
—
— 2.5
6
18
30
50
80
120
150
180
250
315
400
500
630
800 6
18
30
50
80
120
150
180
250
315
400
500
630
800
1 000 20
24
32
32
32
36
40
48
56
64
72
80
96
112
128 12
15
20
20
20
22
25
30
35
40
45
50
60
70
80
5.1.1.2 The actual width deviation of angular contact ball bearing shall not exceed those specified in Table 2.
Table 2 Actual Width Deviation of Angular Contact Ball Bearing In: μm
d
mm ΔTs
Diameter series
7, 8, 9, 0 2 3 4
> ≤ Upper limit deviation Lower limit Deviation Upper limit deviation Lower limit Deviation Upper limit deviation Lower limit Deviation Upper limit deviation Lower limit Deviation
10
18
30
50
80
120
180 18
30
50
80
120
180
250 0
0
0
0
0
0
0 -300
-300
-300
-300
-500
-500
-500 0
0
0
0
0
0
0 -300
-300
-300
-400
-500
-500
-800 0
0
0
0
0
0
0 -300
-400
-400
-500
-800
-800
-800 —
—
0
0
0
—
— —
—
-400
-600
-600
—
—
5.1.1.3 The contact angle of angular contact ball bearing and its tolerance shall be in accordance with those specified in the product drawings.
5.1.1.4 Unless otherwise specified, the rivet head, shield and cage shall not protrude out of the bearing face.
5.1.1.5 If the separable ball bearing is not equipped with ring, the steel ball shall not drop out from the cage pocket.
5.1.1.6 After the shield (seal ring) or shell is pressed fit with the bearing outer ring (or inner ring), they shall be free from any looseness or relative rotation with press-fit ring.
5.1.1.7 After getting assembled, self-aligning ball bearings shall rotate flexibly, with good aligning performance, and the steel balls shall not drop out from the cage pocket.
5.1.1.8 Bearing shall rotate stably, briskly and without any blocking phenomenon. If there is any requirement for running torque, the inspection on it shall be carried out as specified by the manufacturer.
5.1.2 Parts
5.1.2.1 The working surfaces of bearing ring and rolling element shall be free from any grinding burn, decarburization and soft spot, while other surfaces shall be free from any visible processing defect and crack. Other requirements for the appearance quality of parts are as specified by the manufacturer.
5.1.2.2 After subject to riveting, the cage shall be free from the following defects:
——extrusion on steel balls in the cage pocket;
——loose riveting;
——crack;
——chiselling mark on rivet head, and overproof incompleteness of rivet head;
——obvious misalignment of two half cages, and tilted rivet head;
——pressed mark on the external surface of cage.
5.1.2.3 The steel balls with nominal diameter of 3mm~50.8mm shall be subjected to crushing test in accordance with JB/T 1255-2014. The steel balls with nominal diameter above 50.8mm shall be subjected to compression test; see Annex A.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Specifications
Annex A (Normative) Compression Test on Steel Balls
Bibliography
