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Description
Material:38CrMoAIA
Tempering hardness: HV260-280
Diameter:?15mm-?300mm
L/D:4-35
Nitrided hardness: HV950-1050
Depth of nitriding: 0.6mm-0.8 mm
Nitriding brittleness: ? 2 grade
Surface roughness:Ra 0.4um
Straightness of the screw/barrel:0.015mm/m
Inside&outside diameter tolerance:?0.02mm
Circular run-out:?0.04mm
Key&spine tolerance grade:Grade 7
Tempering hardness: HV260-280
Diameter:?15mm-?300mm
L/D:4-35
Nitrided hardness: HV950-1050
Depth of nitriding: 0.6mm-0.8 mm
Nitriding brittleness: ? 2 grade
Surface roughness:Ra 0.4um
Straightness of the screw/barrel:0.015mm/m
Inside&outside diameter tolerance:?0.02mm
Circular run-out:?0.04mm
Key&spine tolerance grade:Grade 7
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