Standard No.:	GB/T 28698-2012
English Name:	Rolling bearings—Deep groove ball bearings for electric motors—Specifications
Chinese Name:	滚动轴承 电机用深沟球轴承 技术条件
Chinese Classification:	J11    Rolling bearing
Professional Classification:	GB    National Standard
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Source Content Issued by:	AQSIQ;SAC
Issued on:	2012-9-3
Implemented on:	2013-3-1
Status:	abolished
Abolished on:	2025-10-05
Target Language:	English
File Format:	PDF
Word Count:	6000 words
Translation Price(USD):	150.0
Delivery:	via email in 1 business day

1. Scope This standard defines the specifications, testing methods, inspection rules, marks and rustproof packaging for deep groove ball bearings (hereinafter referred to as bearings), whose bore diameters range from 3mm to 120mm, for normal electric motors. This standard can be applied to the production, inspection and user acceptance of bearing factories. 2. Normative References 3. Symbols The symbols given by GB/T 7811-2007 are also compliant with this standard. 4. Designation systems The designation systems of the bearings follow the standard GB/T 272-1993 and JB/T 2974-2004. Designation example:

Contents Foreword I 1. Scope 2. Normative References 3. Symbols 4. Designation systems 5. Specifications 5.1 Materials and heat treatments for rings and rolling elements 5.2 Cages 5.3 Seal and shield 6. Testing Methods 7. Inspection Rules 8 Marking 9 Rustproof packaging Appendix A The Fit of Bearing & Shaft and The Fit of Bearing & housing