Diameter of screw:Φ20mm~Φ600mm

Ratio of length to diammeter:L/D=15~55

Material:38CrMoAl

Technical specification:

1. Hardness after hardening & tempering: HB240-280

2. Nitrided hardness: HV850-1000

3. Nitrided depth: 0.45-0.7mm

4. Nitrided brittleness: Less than grade 2

Application

Injection moulding machine both horizontal&vertical type,Extrusion moulding machine .Any rubber and plastic moulding machine.