Bearing Material

Standard material for rings and balls is a vacuum degassed high carbon chromium steel allowing for high efficiency, low torque, low noise level and long bearing life.

For bearings requiring anti-corrosion or heat-resistance properties, martensitic stainless steel is used.

CHEMICAL COMPOSITION OF BEARING MATERIALS

MATERIAL
HIGH CARBON CHROMIUM STEELSTAINLESS STEEL
SYMBOLSUJ2
SUS440CKS440
(ACD34)
CHEMICAL COMPOSITION % C
0.95~1.10 0.95~1.20
0.60~0.75
Si0.15~0.35≤1.001.00
Mn0.501.001.00
P0.0250.0400.030
S0.0250.0300.020
Cr1.30~1.6016.00~18.0011.50~13.00
Mo0.08≤0.750.30
EQUIVALENT SAE52100, 100Cr6AISI440C,
X102CrMo17
X65Cr13