Description
A heat shrink machine uses electromagnetic induction to expand the bore of a toolholder, allowing a cutting tool to be inserted. When the holder cools, it contracts for a rigid, 360-degree grip with extremely low runout. These machines feature fast cycle times (seconds) and built-in cooling systems.

How the Process Works
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- Heating: The machine uses high-frequency magnetic fields to heat the toolholder’s nose, causing the metal to expand.
- Insertion: The cutting tool is quickly dropped into or removed from the expanded bore.
- Cooling: The machine cools the holder (via compressed air, water/coolant, or liquid cooling base), forcing it to shrink and lock the tool securely.
Key Benefits
- High Precision: Exceptional concentricity and low runout (< 0.0001″ or ~0.002mm), which improves surface finish and extends tool life.
- High Clamping Force: Provides maximum grip without relying on set screws or collets.
- Clearance: Smaller nose diameters and long-reach options allow for better part access in 5-axis machining.