single screw and barrel

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single screw and barrel
Posting date : Feb 16, 2011
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Free Member Scince Jan 19, 2011
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39-
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inner Diameter :Ø20-Ø300 Effective length:12000mm Hardness of quenching and tempering:HB240°~280° Hardness of nitration:HV850°~1000° 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 alloy:HRC56°~65°(Ni-based alloy) Material :quality alloy steels 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

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