Shaftless Spirals
Motridal manufactures continuous flighting, also known as shaftless screws or centerless screws, in a large range of thicknesses and diameters.
Produced from a flat bar, in either Carbon, Stainless or wear resistant Steels, for shaftless augers, augers with a high filling ratio or shaft mounted for a complete auger.
The main applications use a single piece of continuous flighting or two helixes coaxially welded together.
Dimensions
| Diameter (D) | 20 ÷ 660 (mm) |
| Pitch (P) | 10 ÷ 1000 (mm) |
| Thickness (S) | 3 ÷ 30 (mm) |
| Produced | 360° – 180° – 120 ° – 90° – 45° – 30° |
Shaftless Spirals
Materials
| Carbon Steels | FE430B (S275JR / 1.0044), FE510B (S355JR / 1.0045) |
| Stainless Steels | AISI304 (1.4301), AISI316L (1.4404) |
