The product specification:
PX-62 ~ 200
Length-diameter ratio: L/D = 18 to 25
Screw compressed according to different raw materials and different than product design

Product synopsis:
The different to parallel double screw machining PVC tubing, the alien materials, board (sheet material), modification and the hard and soft PVC granules, etc

Technical index:
Materials with high quality and chromium molybdenum aluminum (38 CrMOALA)

Surface hardness: HV 290

Nitriding hardness: HV950 ~ 1000 

Nitriding depth: 0.45 ~ 0.7 mm

Nitriding brittle: more than level 1

The surface roughness: Ra0.4

Screw the straightness: 0.015 mm

After nitriding chromium plating surface hardness: 900 HV:

Chromium plating thickness: 0.05 ~ 0.10 mm

Double alloy hardness: 60-70