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
