Standard No.:	JB/T 6635-2007
English Name:	Rolling Bearings-Variable Transmission Bearings
Chinese Name:	滚动轴承 变速传动轴承
Chinese Classification:	J11    Rolling bearing
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Source Content Issued by:	NDRC
Issued on:	6-Mar-07
Implemented on:	2007-9-1
Status:	abolished
Abolished on:	2024-07-11
Superseding:	JB/T 6635-1993
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	100.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the structural type, designation methods, boundary dimensions, technical requirements, measurement methods, test methods, inspection rules, marking and packaging and the like of the variable transmission bearings. This standard is applicable to the production, inspection and customer acceptance of the variable transmission bearings with rated input power no larger than 30kW. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative documents referred to applies. GB/T 307.1-2005 Rolling Bearings - Radial Bearings - Tolerances (ISO 492: 2002, MOD) GB/T 2828.1-2003 Sampling Procedures for Inspection by Attributea- Part 1: Sampling Schemes Indexed By Acceptance Quality Limit(AQL) for Lot-By-Lot Inspection (ISO 2859-1: 1999, IDT) GB/T 10069.1-2006 Measurement of Airborne Noise Emitted by Rotating Electrical Machines and the Noise Limits - Part 1: Method for the Measurement of Airborne Noise Emitted By Rotating Electrical Machines (ISO 1680: 1999, MOD) GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging JB/T 3574-1997 Rolling Bearings - Marking for Products JB/T 7051-2006 Rolling Bearing Parts-Methods for the Measurement and Assessment of Surface Roughness

Contents Foreword I 1 Scope 2 Normative References 3 Symbols and Definitions 4 Structural Types 5 Designation Methods 5.1 Basic Code 5.2 Suffix Code 5.3 Designation Example 6 Main Parameters 6.1 Transmission Ratio 6.2 Boundary Dimensions 7 Technical Requirements 8 Measurement Methods 8.1 Tolerance 8.2 Surface Roughness 9 Test Methods 9.1 Test instruments and Equipment 9.2 No-load Test 9.3 Load Test and Determination of Mechanical Efficiency 9.4 Temperature Rise Stabilization Test 9.5 Noise Determination 9.6 Overload Test 10 Inspection Rules 10.1 Delivery Inspection 10.2 Type Inspection 11 Marking and Packaging