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Screw barrel of rubber machine

Product details


Diameter of rubber pin screw barrel: Φ 75mm- φ 200mm

Rubber cold and hot feeding screw barrel diameter: Φ 30mm- φ 300 mm

Length diameter ratio: 12-18


Base material:

1)38CrMoAlA(JIS SACM645)

2)42CrMo(AISI 4140)

3)4Cr5MoSi V1 (JIS SKD-61)


Treatment process:

heat treatment

Nitriding treatment


Technical parameters:

Nitriding depth: 0.50mm-0.80mm

Nitriding hardness: 900-1000HV

Nitriding brittleness:<=Grade 1

Surface roughness: Ra 0.4

Screw straightness: 0.015mm

Hardness of chromium coating on the surface after nitriding: ≥ 950HV

Chromium coating thickness: 0.025~0.085mm

Double alloy depth: 3mm