Extruder rubber screw

Product Details

Specification:

Rubber pin screw barrel diameter: Φ75mm-φ200mm

Rubber cold and hot feed screw barrel diameter: Φ30mm-φ300 mm

Length to diameter ratio: 12-18

Base material:

1) 38CrMoAlA (JIS SACM645)

2) 42CrMo (AISI 4140)

3) 4Cr5MoSi V1 (JIS SKD-61)

Processing process:

Heat treatment

Nitriding treatment

Technical Parameters:

Nitriding depth: 0.50mm-0.80mm

Nitriding hardness: 900-1000HV

Nitrided brittleness: <= 1 level

Surface roughness: Ra 0.4

Screw straightness: 0.015mm

Surface chrome plating hardness after nitriding: ≥950HV

Chrome plating thickness: 0.025~0.085mm

Double alloy depth: 3mm