 |
| Quantity: |
50 Balls |
| Size: |
7/32" Diameter |
| Ball Weight |
0.025 oz (0.700 gm) ea |
| ABMA Grade: |
Grade 25 (+/-.0001" Mirror Smooth) |
| AISI Material: |
52100 Solid Chrome Steel | |
Chrome steel (AISI 52100) bearing balls are highly polished steel balls used in ball bearing assemblies and other fundamental machine applications.
These high grade ultra precision balls are used in all facets of manufacturing including aerospace and consumer goods, like bicycle and vehicle construction.
Grade 25 is the standard grade used in most industrial applications.
A lower grade number represents a higher precision and a better surface finish (see chart below).
ABMA Bearing Ball Grade Tolerances Chart
| Grade |
Size range [in] |
Sphericity [in] |
Lot diameter variation [in] |
Nominal ball diameter tolerance[in] |
Maximum surface roughness (Ra) [µin] |
| 3 |
0.006--2 |
0.000003 |
0.000003 |
±0.00003 |
0.5 |
| 5 |
0.006--6 |
0.000005 |
0.000005 |
±0.00005 |
0.8 |
| 10 |
0.006--10 |
0.00001 |
0.00001 |
±0.00005 |
1.0 |
| 25 |
0.006--10 |
0.000025 |
0.000025 |
±0.0001 |
2.0 |
| 50 |
0.006--10 |
0.00005 |
0.00005 |
±0.0002 |
3.0 |
| 100 |
0.006--10 |
0.0001 |
0.0001 |
±0.0005 |
5.0 |
| 200 |
0.006--10 |
0.0002 |
0.0002 |
±0.001 |
8.0 |
| 500 |
0.006--10 |
0.0002 |
0.0002 |
±0.001 |
8.0 |
| 1000 |
0.006--10 |
0.001 |
0.001 |
±0.005 |
|
 Your online source for precision bearing balls! |
Visit my store home 
