ABMA 10 : 1989
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
METAL BALLS
01-01-1998
01-01-1989
SECTION
1 Scope
2 Definition and symbols
3 Requirements
3.1 Materials
3.2 Hardness
3.3 Case depth
3.4 Quality of surface
3.5 Geometric quality
3.6 Corrosion resistance
4 Standard and preferred sizes by materials
and grades
5 Quality assurance provisions
6 Ordering specifications and package marking
Appendix
A Measurement of deviation from spherical form
B1 Recommended procedure for microhardness testing
of small balls
B2 Recommended procedure for measurement of case
depth in carburized and hardened carbon
steel balls
B3 Corrections for hardness readings taken on
spherical surfaces
C Density, weight and quantity of common ball
materials
List of tables
1 Commonly used material specification reference chart
2 Case depth requirements for carbon steel balls
3 Tolerances by grade for individual balls
4 Tolerances by grade for lots of balls
5 Preferred ball sizes
6 Applicable inspection levels and AQL
7 Typical ball gages for grades 3 thru 200
8 Magnification factor
9 Ball hardness corrections for curvatures
10 Density of common ball materials
11 Number of balls
12 Weight of balls
List of figures
1 Variations in lot grade 10 balls
2 Ball gage
3 Ball gage deviation
4 Vee block
5 Suggested method of mounting miniature balls for
microhardness testing
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