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                      Rubber screw

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                      Rubber screw

                      Rubber screw

                      • Specifications:
                         
                        Rubber pin screw barrel diameter: Φ 75mm - Φ 200mm
                         
                        Rubber cold and hot feeding screw barrel diameter: Φ 30mm - Φ 300mm
                         
                        Aspect ratio: 12-18
                         
                         
                         
                        Substrate 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 surface chromium plating after nitriding: ≥ 950hv
                         
                        Thickness of chromium plating layer: 0.025 ~ 0.085mm
                         
                        Double alloy depth: 3mm
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