Tool Holder Clamping Torque Comparison
In CNC machining, clamping torque is critical for tool stability and cutting performance.
It represents the torque resistance that prevents tool slippage and ensures accurate, vibration-free machining.
Different holder types deliver varying torque levels depending on design and application.
| Tool Holder Type | Typical Clamping Torque (Nm) | Runout Accuracy (mm) | Application |
|---|---|---|---|
| ER Collet Chuck | 50 – 150 Nm | ≤ 0.01 | General purpose machining |
| Side Lock Holder | 200 – 400 Nm | ≤ 0.01 | Heavy milling |
| Hydro Grip Holder | 400 – 600 Nm | ≤ 0.003 | Precision finishing |
| Power Milling Chuck | 600 – 800 Nm | ≤ 0.005 | Heavy roughing |
| Shrink Fit Chuck (Bilz ThermoGrip®) | 800 – 1200 Nm (for Ø20 mm tool shank) | ≤ 0.003 | High-speed & precision finishing |
Notes
- Values indicate typical clamping torque ranges for tool diameters from Ø12 mm – Ø20 mm.
- Bilz ThermoGrip® Shrink Chucks provide constant and uniform torque along the tool shank, ensuring superior rigidity and balance at high speeds.
- Torque levels depend on tool size, holder geometry, and operating conditions.
At Indra Engineering Services, we supply precision-engineered Bilz tool holding systems designed for stability, accuracy, and maximum cutting efficiency.
