4mm Solid Bearing Balls Chromium Steel (GCr15) G10 Precision Balls 25 Pack

-High quality GCr15 stainless steel bearing balls

-Chromium Steel (GCr15) made with heat treating, provides high and uniform hardness, good wear resistance,toughness and stability stability.

-They are High elastic limit suitable for antifriction bearings (rolling bearings).

-Chromium Steel (GCr15) balls generally have excellent resistance to mild acids, alkalis, foods, fresh water and air.

-They are well-suited to bearings, valves, locking mechanisms, fasteners and quick-disconnect couplings.



Suitable for a range of purposes, some of the most common are listed below:
-1/8" is often used for clusters and old English-Style headsets
-1/4" is often used for rear wheels and bottom brackets
-3/16" is often used for front wheels
-5/32" is often used for headsets with pressing cups
 
Specification:
Material: Chromium Steel (GCr15)
Precision: G10
Diameter: 4mm
Hardness: 60-63 HRC