1. We can manufacture all types of screws and barrels according to clients' requirement.

Size:

Screw diameter: 20-500mm
Maximum screw length: 10000mm
Barrel inner bore diameter: 500mm
2. Technology: Nitriding treatment, alloy coating spraying, heat-treatment applied

3. Technical parameter:

Material: 38CrMoAIA, 42CrMo, alloy powder
Nitride depth: 0.7mm
Surface hardness: HV950 - HV1, 020
Fragility of nitrition: Less than grade 1
Screw straight tolerance: 0.015 mm/m
Surface roughness: Ra 0.4μ M
Linearity of the screw: 0.015mm
Depth of double alloys: > 2RAM
Bimetallic layer depth: 3mm