bearing roller
Raw material: bearing steel GCr15, AISI52100, SUJ2, or stainless steel, etc
Dia: 1-60mm
Hardness: HRC60-65
Tolerance: according to the standard
DIA 0.003mm
Length: 0.03mm
Roughness: Ra 0.2, or under 0.05 after superfinishing
Use in: automobile, motocycle, baby carrier, textile machinery, etc