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Conical twin screw barrel

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 according to customers’ requirements.

The compression ratio of screws can be designed according to different products and mixtures.

Technical Parameter:

Hardness After Hardening & Tempering:HB280-320

Nitrided hardness: HV850-1000

Nitrided layer depth:0.50-0.80mm

Nitrided brittleness: ≤ Grade Ⅱ

Surface roughness: Ra 0.4μm

Linearity of screw: 0.015mm

Bimetallic layer depth: ≥2mm

Bimetallic hardness: HRC60-72

Hard-chrome plating hardness after nitriding: ≥900HV

Chrome-plating layer depth: 0.025-0.10mm