Rubber screw and barrel

Size
Screw Diameter:dia50-500mm
Maximun screw length: 10000mm
Barrel inner bore diameter: dia500mm

TECHNICAL DATA
Depth of nitration case:0.4-0.7mm
Hardness of nitration:HV900-1060 (HRc56°-65°)
Roughness of the surface:Ra 0.4μm
Screw straightness: 0.015mm/m
Chrome plating thickness: 0.01-0.1mm