Chrome Steel Bearing Balls, Bearing Steel Solid Precision Large Steel Balls 39.6880mm- Single 255g * 2 Balls GCR15,(37.5mm)

Is it a standard part: yes >Standard GB308-2002.In line with ISO3290-1998, AFMBA1989, DIN5401-93 and other international standards.G means rolling bearing steel, and CR means that the alloying element contained is ferrochromium. gcr15 means bearing steel containing 1.5% CR.Bearing steel material is not waterproof and rust-proof, please pay attention to maintenance during use.31.5mm single 128g32.5mm single 140g35.5mm single 182g36.5mm single 200g37.5mm single 215g37.8mm single 220g38.5mm single 230g39.5mm single 252g39.688mm single 255g

• Accuracy: G10/Tolerance: ±0.002um
• High carbon chromium bearing steel>GCR15
• Exquisite appearance; precise hydraulic pressure, stable structure, polished and polished; high quality and beautiful appearance!
• Hardness; HRC60-63 degrees
• These bearing balls are installed between the inner ring and the outer ring to reduce friction when the bearing rotates. It can strength the protection to machine and extend the service life.[Applications]: It can be used in humid environments. Suitable for auto parts, bicycles, valves, refrigerators, air conditioners, bearings, photographic equipment, drawer slides and many other applications.