Carbon Steel Balls
Product Feature
These balls are headed from carbon steel and their surfaces are strengthened by carburization and quenching. This is our historic product, which has been produced since the inauguration of AKS.
Usage Example
- ・Bicycle hubs
- ・Automotive parts (Seat adjusters, stabilizer link balls, etc.)
- ・Canister balls and more
Product Specification
1.Chemical Composition of Material (%)
| C | Mn | P | S | |
|---|---|---|---|---|
| Carbon Steel Balls JIS | 0.08～0.13 | 0.30～0.60 | 0.040 or less | 0.040 or less |
※Mainly JIS G 3507SWCH 10R is used.
※Cu contents as impurities shall not exceed 0.30％ respectively. Ni and Cr contents as impurities shall not exceed 0.20％ respectively.
2.Applicable range of ball grades and dimensional accuracy
| Ball Grade | Range of ball sizes | Ball gauges（μm） | Variation of ball lot diameter（μm） | Deviation from spherical form（μm） |
|---|---|---|---|---|
| 100 | 3/8（9.525mm）～1/2（12.700mm） | ±5.0 | 5 | 2.5 |
| 200 | 1/8（3.175mm）～1/2（12.700mm） | ±5.0 | 10 | 5 |
| Special grade | 1/8（3.175mm）～1/2（12.700mm） | ±12.5 | 25 | 12.5 |
※The values in parentheses are in accordance with ISO grade.
※Balls of sizes or grades other than the above-mentioned can be manufactured at your request.
3.Hardness on spherical surface and crushing load
| Ball sizes | Nominal ball diameters（mm） | Hardness（Min） （HRC）Measured value on spherical surface | Crushing load（Min）kN{kgf} |
|---|---|---|---|
| 1/8 | 3.175 | 56.0 | 4.90{ 500} |
| 5/32 | 3.969 | 57.0 | 7.85{ 800} |
| 3/16 | 4.762 | 58.0 | 10.79{1100} |
| 7/32 | 5.556 | 59.0 | 13.73{1400} |
| 15/64 | 5.953 | 59.5 | 15.69{1600} |
| 1/4 | 6.350 | 17.65{1800} | |
| 17/64 | 6.747 | 60.0 | 19.61{2000} |
| 9/32 | 7.144 | 21.57{2200} | |
| 5/16 | 7.938 | 26.48{2700} | |
| 11/32 | 8.731 | 31.38{3200} | |
| 3/8 | 9.525 | 36.28{3700} | |
| 13/32 | 10.319 | 38.25{3900} | |
| 7/16 | 11.112 | 41.19{4200} | |
| 15/32 | 11.906 | 45.11{4600} | |
| 1/2 | 12.700 | 49.03{5000} |