This standard specifies the specifications for the vibration acceleration of deep groove ball bearings (hereinafter referred to as “bearings”) which have boundary dimensions conforming to the requirements for diameter series 0, 2 and 3 specified in GB/T 276-1994, nominal bore diameters of 3 mm ~ 120mm, and the radial internal clearances conforming to the requirements for groups 0, 2 and 3 internal clearance specified in GB/T 4604-2006, as well as the specifications for the corresponding vibration acceleration level peak value of groups Z3 and Z4.
Group Z in this standard is the basic requirement for universal bearing vibration acceleration level, it is applicable to the production inspection of finished bearings by the bearing manufacturer, and the bearings are not marked with "Z". Groups Z1, Z2, Z3 and Z4 which have higher requirement on bearing vibration acceleration level as well as Groups ZF3 and ZF4, which have requirements on the vibration acceleration level and the vibration acceleration level peak value, are applicable to the production inspection and customer acceptance of finished bearings.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 276- 1994 Rolling Bearings- Deep Groove Ball Bearings- Boundary Dimensions
GB/T 2828.1- 2003 Sampling Procedures for Inspection by Attributea-Part1:Sampling Schemes Indexed by Acceptance Quality Limit(AQL) for Lot-by-lot Inspection (ISO 2859-1: 1999, IDT)
GB/T 4604- 1993 Rolling Bearings- Radial Internal Clearance (eqv ISO 5753: 1990)
JB/T 2974- 2004 Rolling Bearings-Identification Code-Supplemental Regulations
JB/T 5314- 2002 Rolling bearing- Measuring Methods for Vibration (Acceleration)
