JB/T 7050-2005 in English

1 Scope

This standard specifies assessment methods for cleanliness of finished rolling bearing (outside diameter of bearing D is less than or equal to 180mm).
This standard is applicable to assessment of bearing cleanness by bearing manufacturer and user.

2 Normative References

The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda), 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 edition of these documents is applicable. For undated references, the latest edition of the normative document applies.

Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Testing Conditions
5 Preparation before Testing
6 Classification of Bearing Sample
7 Testing
8 Doubt Treatment of Inspection Result
9 Sample Quantity
Appendix A (Normative) Ambient Conditions and Determination Method for Dustfall in Cleanness Testing Room
Appendix B (Normative) Method for Blank Experiment
Appendix C (Informative) Control Indicator for Bearing Cleanliness