Search tags：PC400-7 PC400-7 OEM Track Roller/Bottom Roller/Lower Roller Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed. Track Roller
Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.