<2> Material: GCR15 bearing steel

<3> Tolerance: ±0.01mm

<4> Hardness: HRC60

<5> Size (diameter): 50mm,50.8mm,50.9mm,51mm,51.5mm,52.4mm,53mm,54mm,55mm,57mm,57.15mm,58mm,59mm,60mm,61mm,62mm,63.5mm,65mm,69mm,70mm

<6> Note: The ball of this material is not waterproof or rust-proof!

1.high hardness, wear resistance, smooth surface, good roundness, not easy to rust

2.These ball bearings are precision engineered for perfect consistency of weight, dimensions and finish.Made from high grade steel, these balls can withstand tremendous amounts of impact force.

Applications: Widely used in high-speed bottom noise bearings, motors, hardware, wrought iron, machinery parts, bicycles, motorcycles, automobiles, precision instruments, medical equipment, fishing gear, toys, rails, universal ball, luggage, electronics industry, also Can be used as a grinding media. Commonly used in precision equipment such as ball screw, slider guide, linear bearing!

The data is for reference only, there will be some errors, please refer to the actual product!

Remarks: We have other specifications and sizes, please contact customer service for consultation!