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Rubber Screw & Barrel

 

Pin Screw and Barrel Specification: O75mm~O200mm 
Cold/Heat Feed Screw Specification: O65mm~O650mm

Technical Parameter:

Hardness After Hardening & Tempering:HB280-320

Nitrided hardness: 950-1100HV 

Nitrided layer depth:0.50-0.80mm

Nitrided brittleness: Less than 2 level

Surface roughness: Ra 0.4μm

Linearity of screw: 0.015mm/m

Bimetallic layer depth: ≥3mm

Bimetallic hardness: HRC60-72

Hard-chrome plating hardness after nitriding: ≥950HV

Chrome-plating layer depth: 0.025~0.10mm 

 

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