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Conical twin screw and barrel

Specification: 

24/52, 35/76, 45/90, 45/100, 50/105, 51/105, 55/110, 55/120,58/124, 60/125, 65/120, 65/132, 68/143, 70/135,70/140, 75/150, 80/143, 80/156, 92/188, 105/213
Above for the standard specifications, according to customer requirements to customize.

The screw compression ratio can be designed according to different products and different formulations.


Base material:

1) 38CrMoAlA(JIS SACM645)
2) 42CrMo(AISI 4140)
3) 4Cr5MoSi V1 (JIS SKD-61)


Process:

Heat treatment

Nitriding treatment


Technical Parameters:

Nitriding depth: 0.50mm-0.80mm                                
Nitriding hardness: 900-1000HV               
Nitriding: <= Level 1                   
Surface roughness: Ra 0.4                  
Screw straightness: 0.015mm   


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