Size:
Φ 35/ Φ 35 ~ Φ 250/ Φ 250
Ratio of length to diameter: L/D=16 ~ 35
☆ 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
☆ Bimetal coating thickness 1.5-2.0mm
☆ Material: Base material 38CrMoAlA, Welded inlay on the flight, prolong life of screw. Easy wearing parts of barrel feed inlet made from imported anti-wear alloy can be improvde abrasion performance.