AISI 440C stainless steel bearings have resistance to rust, corrosion, and high temperatures.
The 6800, 6900, 6000, 6200 and 6300 ranges are available from stock.
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1. Usable in environments of higher temperatures than SAE 52100 chrome bearing steel

●Recommended temperature range
Specifications Temperature
ZZ type -40 to 150℃/-40 to 302°F
2RS type -30 to 110℃/-22 to 230°F
Open type Subject to lubrication

2. Available with snap ring

Product Specifications

●Standard Specifications
Standard Specifications
Inner and Outer Rings AISI 440C
Balls*1 AISI 440C
Retainer AISI 304
Shield AISI 304
Seal*2 Nitrile rubber
Snap Ring AISI 304
Lubricant*3 Heat-resistant grease
ISO Tolerance Class Normal

The following special specifications are also available.
*1 Ceramic balls (Silicon nitride Si3N4)
*2 Fluorine rubber seal
*3 Heat- and chemical-resistant fluorine grease, food grade grease, and other special greases
*Other C3 or C4 radial clearance


●Food processing machinery, cleaning equipment, carrier device in watery environment, LCD and semiconductor manufacturing equipment, other equipment used in high temperature and humidity environments.


  1. AISI 440C stainless steel is magnetizable.
  2. AISI 440C stainless steel may corrode depending on the environments and conditions.