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