Single Key Screw Shaft | Twin Screw Extruder Screw Shaft
Simple keyed shaft design for reliable torque transmission in low to medium load applications.
Single key screw shafts utilize a keyed connection between the shaft and screw elements, enabling torque transmission through mechanical locking at the key interface.
This design provides a straightforward and cost-effective solution for systems with moderate torque requirements, while allowing flexible assembly and replacement of screw elements.
Due to the localized load distribution at the key interface, this configuration is best suited for applications with controlled torque and limited cyclic stress.
| Diameter | Ø10-200mm |
| Length | 1000～15000mm |
| L/D Ratio | 1~64D |
| Involute Standard | DIN 5480/ GB/T 3478/ANSI B92.1/ISO 4156/JIS B 1602 |
| Spline Type | Single key / Rectangular Spline / Hexagonal / involute spline / Customized |
| Spline Modulus | 1.5 / 2.0 / 2.5 / 3.0 / 4.0 |
| Material | A40/A70/A80/Stainless |
| Tensile Strength | ≥900 MPa |
| Yield Strength | ≥700 MPa |
| Torque Capacity(Max) | 5～18 |
A: Load concentration at the key interface.
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Robust rectangular spline design providing stable torque transmission with moderate load capacity.
Best suited for:
Medium torque systems
Chemical processing
Replacement applications
Six-sided geometry enabling uniform torque transfer and rapid screw element replacement.
Best suited for:
Powder coating
Frequent material changes
Fast screw configuration changes
Precision involute spline ensuring high torque transmission with accurate centering and load distribution.
Best suited for:
High torque extrusion
Engineering plastics
Masterbatch production
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