38CRMOALA Twin Conical Screw
Specifications of standard twin conical screw and barrel
Specifications of standard twin conical screw and barrel
35/75, 45/100, 51/105, 55/110, 55/120, 60/125, 65/132, 80/156, 92/188
Grade of conical twin screw
Degree of Abrasiveness | Low | Moderate | High |
Screws | Nitrided | Bimetallic Spraying | Tungsten Coated |
Barrels | Nitrided | Bimetallic | Bimetallic |
Technical information:
Steel Material | DIN 41CrA1Mo7 / AST M4140/ GB 38CrMoAlA, 9Cr18MoV |
Heat Treatment | Tempered and nitride, nitride depth: 0.5 – 0.7 mm |
Surface hardness: | HV900 – HV1, 000 |
Special treatment: | Carbide coating (screw flight) and bimetallic barrel |
Screw straight tolerance | 0.015 mm/m |
Surface roughness | Ra 0.4μm |