The power of clamping devices: the perfect component with the right decision
![Karnasch tools, water slot cutter, Heroal Verl, tool holder, Elumatec SBZ 122, Schirmer Alu Baz, Thorwesten PBZ, special tools](https://cdn.prod.website-files.com/6384900e759e4d38e069a6e8/66af8bee4c94d13545df2605_Werkzeughalter.jpg)
Clamping is an elementary function in the handling process. It is influenced by tool, workpiece, editing process and environmental, which are also interrelated with each other. Choosing a tool holder depends on the required component quality, accessibility and processing and is determined by variables such as processing speed, concentricity accuracy, clamping forces or clamping moments, to name just a few. It is often based on the user's many years of experience.
Tool holders: pros and cons
Collet chuck
+ Cost-effective variant with frequently changing shaft diameters
+ Requires little space
+ Maximum flexibility
+ High stability
+ Wide selection options
- Interfering contours due to the size of the collet chuck
- Clamping process prone to errors
Weldon food
+ Simplest chuck
+ Lowest purchase price
+ Maximum holding forces
+ Maximum ease of use
+ Very widespread
- Worst rounding cf. with other chucks
- Inaccurate chuck
Shrink lining
+ High clamping force
+ Maximum stiffness
+ Concentricity accuracy < 3 μm
+ Optimal accessibility
+ Very good radial flexibility behavior
+ Excellent holding power
+ Suitable for high speeds
- Shrinking device required (additional cost)
- Susceptible to vibrations
- Training for shredding equipment required. Not intuitive
- Space-intensive. A separate holder is required for each shaft diameter
Hydraulic tensioner chuck
+ High clamping force
+ High stiffness
+ Concentricity accuracy < 3 μm
+ Good accessibility
+ Long service life
+ High vibration damping
+ Suitable for high speeds
+ No additional tools required
- Sensitive to contamination
- Limited at high temperatures