Screw Components Screw Tip Barrel Nozzle Injection
2.The models of screw include:
Technical Parameter for screw tip barrel nozzle injection |
| Steel Material | DIN 41CrA1Mo7 / AST M4140 / GB 38CrMoAlA |
| Deepness of Nitriding Layer | 0.7 mm -0.9 mm |
| Hardness of Nitriding | HV900 - HV1,000 |
| Nitriding Brittleness | ≤Grade 1 |
| Chromate plating |
Thickness 0.05 mm - 0.10 mm, hardness HV950 |
| Special treatment |
Carbide coating on screw flight and bimetallic barrel |
| Screw straight tolerance | 0.015 mm/m |
| Surface roughness | Ra 0.4μm |
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