Track Rollers

Composition: Collar, Shaft, Copper Sleeve, Shell, Floating Seal Material: 23MnB, or 26MnB (carbon amount determines the degree of hardness) Process: the overall quenching Core hardness & Surface hardness: 42-52HRC 1 Collar Material: Q7450-10 Quenched and tempered: Ultra-audio (standard process) 2-4mm surface depth of hardness (medium frequency process 3-8mm) VS High-frequency processing (ultra-audio) shallow 0.5-1mm 2 Shaft Material: 45 # or 42CrMo (standard) Process: surface quenching Surface hardness: 54-58 HRC 3 Copper Layer Material: CuPb, copper and iron Copper layer thickness: about 0.35mm Inside and outside: 6-6