∮35/75 ∮37/75 ∮45/90 ∮45/97 ∮50/105 ∮51/105 ∮55/105 ∮55/110
∮55/120 ∮58/125 ∮60/115 ∮65/125 ∮65/120 ∮65/132 ∮70/140 ∮75/150 ∮80/143 ∮80/156 ∮92/188
We also could process according to your drawings or design for you
The compression ratio of the screw canbe designed according to different products and mixtures.
Technical specification
Hardness after hardening&tempering:HB240-280
Hardness of nitride layer:HV850-1000
Nitrided brittleness:less than grade 2
Surface roughness:Ra0.4
Screw straightness:0.015mm
Surface chromiun-plating's hardness after nitriding:≥900HB
Alloy hardness:HRC50-65
Alloy depth:0.8-2.0mm
Meterial&processes
Quality 38 CrMoALA
42CrMo
CW6Mo5Cr4V2
9Cr18MoV
Quality powder metallurgy raw materials
Cold/thermal spray hard metal process
Advanced nitriding process
Corrosion & abrasion resistance bimetallic spraying process
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