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Extruder screw barrel

Diameter: 15-500

L/D ratio:15-55

Technical Parameter:

Hardness After Hardening & Tempering:HB280-320

Nitride hardness: 950-1100HV 

Nitride layer depth:0.50-0.80mm

Nitride brittleness: Less than 2 level

Surface roughness: Ra 0.4m

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 

Product classification:

According to different ingredents and products the screw can be chosen: general type, pin type, barrier type, separation type, and gas-exhausting/vented type, etc.


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