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Screw For Rubber Machine - China

price: contact company for price

Product Specification and technical data
inner Diameter:Ø45-Ø300
L/D=8~20
Hardness of quenching and tempering:HB240°~280 °
Hardness of nitration:HV850°~100 0°
Depth of Nitrated Layer:0.45~0.7mm
Fragility of nitration:≤ Grade 2
Surface roughness:Ra0.4
straightness:0.015mm
Hardness of Cr-coating Layer:HV≥900HV
Nitrided layer thickness:0.05~0.10mm
Thickness of Cr-coated Layer:0.8~2.0mm
Hardness of bimetallic:HRC56°~65 °(Ni-based alloy)

Material :quality alloy steel
① 38CrMoALA(JIS SACM645)
② 42CMo(JIS SCM440)
③ 9Cr18MoV
④ CW6Mo5Cr4V2
Heat-treatment:
Nitriding treatment
Electroplated hard-chrome finish
High-frequency quenching
Spray coating Bimetallic-alloy
vacuum quenching

1) high temperature, high temperature deformation;
2) wear resistance, long life;
3) resistant to corrosion, corrosive materials;
4) high intensity, which can withstand high torque, high speed;
5) has a good machinability;
6) The residual stress after heat treatment, thermal deformation and so on.


Company Contact:


  • Phone: +8657489075950

  • Address: NO.16 XINGHAI SOUTH RD, HI-TECH ZONE, Ningbo, Zhejiang, China

  • Email: Email


Published date: August 11, 2016 -

  • Business Description: Ningbo Superior Machinery Co., Ltd was founded in 1992, which is one of the earliest manufacturers of screw and barrel for plastic processing machine in China. We are aiming at serving small-scale corporations during our early business period and we have served more than 1000 small or middle-scale corporations producing various kinds of plastic products so far. This fact has lead to an extensive accumulation of technological”know how”and experience for us.

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