1x Bottom Roller. Roller Specifications ：. Bolt, grade 12.9, HRC45-52. Surface Hardness: HRC52-58, Deepth:5mm-10mm. So we could help you solve the problem well. Material: 50 MnB Steel. We will do our best to solve your problem as soon as possible.
1x Bottom Roller. Roller Specifications ：. Bolt, grade 12.9, HRC45-52. Surface Hardness: HRC52-58, Deepth:5mm-10mm. So we could help you solve the problem well. Material: 50 MnB Steel. We will do our best to solve your problem as soon as possible.
Roller Specifications ：. Bolt, grade 12.9, HRC45-52. Surface Hardness: HRC52-58, Deepth:5mm-10mm. So we could help you solve the problem well. Material: 50 MnB Steel. We will do our best to solve your problem as soon as possible.
Roller Specifications ：. Bolt, grade 12.9, HRC45-52. Surface Hardness: HRC52-58, Deepth:5mm-10mm. So we could help you solve the problem well. Material: 50 MnB Steel. We will do our best to solve your problem as soon as possible.
Two pieces roller shell rim. Heat treated shells for body strength and longer wear life. Heat treated for a deep uniform hardened depth that provides wear life equal to link wear life. Center flange absorbs side thrust from roller shell.