Stainless Steel AISI440 Hardened Loose Ball Bearings Hardened to 57-60 Rockwell Scale.
AISI 440
Stainless steel AISI 440 offers the advantage of higher through hardness than other stainless steel material, as well as a considerable resistance to corrosion against water, steam, oil, gasoline and alcohol. The high hardness, grade of surface finish, and extremely accurate tolerances ensure that this type of steel is suitable material for stainless steel precision ball bearing, oil refinery valves, ball-point pens and other rigid environmental applications.
International equivalents: DINX105 CR Mo17 - JIS SUS 440C - Z100CD17 - Wks 1.4125
Size range: 0.635mm (0.025 inch) - 101.6mm (4 inch)
Standard grade available: 10 - 16 - 20 - 28 - 40 - 100 - 200 - 500 - 1000
Hardness: HRC 57 - 60