Search tags：PC30-6/7 PC30-6/7 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. Mini Excavator
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.