... ,248series,239series,,230series,240series,231,241,222,232series,etc.2. Material: Gcr15-China, (AISI) 52100-USA, (DIN) 100CR6-Germany3. Retainer: J ... motors, generators, internal combustion engines, gas turbines, machine tool spindles, deceleration devices, and material handling machinery and various types of industrial machinery.7 ...