SUJ2 bearing steel balls, also written as SUJ-2, are widely used in precision bearings and motion systems, offering consistent load performance, wear resistance, and long fatigue life for demanding rolling applications.
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Also known as bearing steel balls, SUJ2 is a standard material used in precision bearings and motion control applications.
SUJ2 bearing steel balls are produced from high-carbon chromium steel and are widely used in precision bearings and mechanical systems.Their through-hardened structure ensures consistent dimensional stability and reliable performance under high-speed and continuous rolling conditions.
| Item | Specification |
| Material | SUJ2 / AISI 52100 / 100Cr6 |
| Size Range | 0.5 mm – 200 mm |
| Hardness | 60 – 66 HRC |
| Precision Grades | G10 – G1000 |
| Density | 7.81 g/cm³ |
| Standard | ISO 3290 / JIS standard equivalent |
| Heat Treatment | Through-hardened |
| Packing | 10 kg or 20 kg per carton, approx. 1 ton per pallet, or as required |
| Condition | Dry or oiled (anti-rust protection) |
| Delivery Time | Stock available or 35 days |
| Element | C | Si | Mn | P | S | Cr |
| Typical Value (%) | 0.93–1.05 | 0.15–0.35 | 0.25–0.45 | ≤0.025 | ≤0.015 | 1.35–1.65 |
Typical chemical composition shown for reference only. Actual values may vary slightly depending on the specific standard or material designation ordered.
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