Parallel Twin Screw
Overview
Parallel Twin Screw, listed by Zhejiang Zhongyang Screw Manufacturing Co., Ltd in Zhoushan, Zhejiang. The listing gives nitriding layer depth 0.5–0.8 mm, nitrided hardness HRC 56–58 and nitrided brittleness Less than grade 1.
Technical specifications
| Nitriding layer depth | 0.5–0.8 mm |
|---|---|
| Nitrided hardness | HRC 56–58 |
| Nitrided brittleness | Less than grade 1 |
| Surface roughness | Ra 0.4 |
| Linearity of screw | 0.015 mm |
| Hard-chrome plating hardness | ≥ HRC 57 |
| Chrome-plating layer depth | 0.03–0.09 mm |
| Bimetallic layer depth | 3 mm |
| Bimetallic layer hardness | HRC 58–62 |
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