Conical Barrel Screw

Tempering hardness：HB260-290

Nitridation hardness：HV800-1050

Nitration case depth：0.4-0.7mm

Nitridation brittleness ≤ grade 1

Surface roughness：Ra0.4

Screw straightness：0.015mm

Chromium coating hardness after nitridation：≥900HV

Chromium coating thickness：0.05-0.10mm

Dual alloy hardness：HRC56-65

Dual alloy hardness：0.8-2.0mm

Material and technology

Quality 38CrMoAIA

Quality duplex stainless steel

Quality power metallurgy material

Cold/hot spraying hard metal technology

Advanced nitriding technology

Corrosion resistance, wear-resisting dual alloy spraying technology

Taper twin-screw, diplopore barrel series

SJS 35, SJS 51, SJS 55, SJS 65, SJS 80, SJS 92, 

Screw diameter / screw amount

35/80-2, 51/105-2, 55/113-2, 65/132-2, 80/156-2, 92/188-2

Screw direction: anti-clockwiseoutward

Crew speed：

1-40,2-32,1-36,1-32,1-32,1-32

Screw effective length

810mm，1070,1200,1441,1800,2500mm