This standard specifies the test and assessment methods for cleanliness of rolling bearing (hereinafter referred to as "bearing") and bearing part.
This standard is applicable to the test and assessment of various open bearings and closed bearings before grease filling as well as the test and assessment of bearing parts.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
SH 0004-1990(2007) Solvent oil for Rubber Industry
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
impurity
the particle attached on the surface of bearing/bearing part and having influence on bearing performance
3.2
particle size
the maximum size of particle (the maximum distance from point to point on the contour line of particle striograph)
3.3
bearing/bearing part cleanliness
the weight of impurity on each set of bearing/each bearing part or the weight of impurity per unit surface area; the size and number of impurity particle from each set of bearing/each piece of bearing part or the size and number of impurity particle per unit surface area
1. Scope 2. Normative Reference 3. Terms and Definitions 4. Measurement Principle 4.1 Weighing Method 4.2 Particle Counting Method 5 Environmental Conditions of Measurement 6 Measuring Device, Instrument, Material and Cleaning of Instrument 7 Measurement Procedures 7.1 Blank Test 7.2 Weighing Method 7.3 Particle Counting Method 7.4 Counting Procedures 8. Cleanliness Assessment Annex A (Normative) Measurement Method for Dustfall Quantity per Unit Area of Cleanliness Measuring Chamber A.1 Measuring Device and Instrument A.2 Material A.3 Measurement of Dustfall Quantity A.4 Calculation of Dustfall Quantity per Unit Area Annex B (Normative) Measuring Device, Instrument and Material for Cleanliness and Cleaning of Instrument B.1 Measuring Device and Instrument B.2 Material B.3 Cleaning of Instrument Annex C (Normative) Procedures for Blank Test and Effective Filtration Area (EFA) Calibration C.1 Procedures for Blank Test C.2 Procedures for Effective Filtration Area (EFA) Calibration Annex D (Normative) Cleanness Limit of Radial Ball Bearing
1 Scope
This standard specifies the test and assessment methods for cleanliness of rolling bearing (hereinafter referred to as "bearing") and bearing part.
This standard is applicable to the test and assessment of various open bearings and closed bearings before grease filling as well as the test and assessment of bearing parts.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
SH 0004-1990(2007) Solvent oil for Rubber Industry
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
impurity
the particle attached on the surface of bearing/bearing part and having influence on bearing performance
3.2
particle size
the maximum size of particle (the maximum distance from point to point on the contour line of particle striograph)
3.3
bearing/bearing part cleanliness
the weight of impurity on each set of bearing/each bearing part or the weight of impurity per unit surface area; the size and number of impurity particle from each set of bearing/each piece of bearing part or the size and number of impurity particle per unit surface area
Contents of GB/T 33624-2017
1. Scope
2. Normative Reference
3. Terms and Definitions
4. Measurement Principle
4.1 Weighing Method
4.2 Particle Counting Method
5 Environmental Conditions of Measurement
6 Measuring Device, Instrument, Material and Cleaning of Instrument
7 Measurement Procedures
7.1 Blank Test
7.2 Weighing Method
7.3 Particle Counting Method
7.4 Counting Procedures
8. Cleanliness Assessment
Annex A (Normative) Measurement Method for Dustfall Quantity per Unit Area of Cleanliness Measuring Chamber
A.1 Measuring Device and Instrument
A.2 Material
A.3 Measurement of Dustfall Quantity
A.4 Calculation of Dustfall Quantity per Unit Area
Annex B (Normative) Measuring Device, Instrument and Material for Cleanliness and Cleaning of Instrument
B.1 Measuring Device and Instrument
B.2 Material
B.3 Cleaning of Instrument
Annex C (Normative) Procedures for Blank Test and Effective Filtration Area (EFA) Calibration
C.1 Procedures for Blank Test
C.2 Procedures for Effective Filtration Area (EFA) Calibration
Annex D (Normative) Cleanness Limit of Radial Ball Bearing
