Specifications for Taper Twin Screw/Barrel

Source of Material: 

Japan Daido SACM645 Standard

Temper：HRC 24°-26°

Water Hole (oil hole): Parallelism 0.15/M  Screw

Nitrogen Treatment: 900~950HV 

Depth of Nitration

Roughness: Ra0.4µm (or less)

Parallelism Angle within ±0.005°              Barrel

Straightness: Within 0.03mm/M              Screw

Bimetallic Material: Fe-Ni based alloy

Processing Range

Bimetallic Technique of Barrel:

Overall Sealing Type

Length of Barrel: 600L Max.

Bimetallic Hardness HRC 60°-68°

Bimetallic Depth 1.5-2mm