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| Material | SUS420J2/SUM24L/SUS300/SUS42J2/SUM24L/SUS300 |
| Roundness | 0.0003mm |
| Cylinderness | 0.0005mm |
| Roughness | Ry0.4 |
| Gear/Worm Precision | Grade 6 |
| Position | 0.03mm |
| Heat treatment | point hardening ( cementite, oxidation, high frequency ), quench hardening |





Description