Specification:
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

The above are standard specifications, we can customize accordingto customers' requirements.

The compression ratio of screws can be designed according todifferent products and ingredients.

base Materials:
1)38CrMoAlA(JIS SACM645)
2)42CrMo(AISI 4140)
3)4Cr5MoSi V1 (JIS SKD-61)
4)9Cr18MOV
5)HPT

Bimetallic alloy materials:
(1)Fe-based alloy
(2)Ni-based alloy/Deloro alloy
(3)Co-based alloy
(4)NiCo-based alloy
(5)Tungsten carbide/Wolfram carbide

Technics:
Heat treatment
High-frequency quenching
Nitriding treatment
Hard-chrome electroplating
Bimetallic alloy welding
Bimetallic alloy centrifugal casting

Technical parameter:
Nitrided layer depth: 0.5-0.8mm
Nitrided hardness: 900-1000HV
Nitrided brittleness: Less than grade 1
Surface roughness: Ra0.4
Linearity of screw: 0.015mm
Hard-chrome plating hardness after nitriding: ≥ 950HV
Chrome-plating layer depth: 0.025-0.085mm
Bimetallic layer depth: 3mm

Warranty and service: 1 year.
Focus on quality and service.
Experienced manufacturer, we will be the best choice.