| spare parts type | screw barrel | material | Metal |
| machinery test report | Provided | video outgoing-inspection | Provided |
| key selling points | Long Service Life | Weight (KG) | 10000 |
| Screw name | Nitrided screw barrel | Characteristics | WEAR RESISTANCE AND ANTI-CORROSION |
| L/D | 15-45 | Based material | 38Crmoala |
| depth of nitration | 0.5-0.8mm | hardness of nitration | 950-1020Hv |
| roughness of surface | Ra 0.4um | Fragility of nitration | less than grade 1 |
| Linearity of screw | 0.015mm | bimetallic layer thickness | 2-3mm |