Video: Safe Shrink-Fit Has Built-in Cooling
The cycle for heating the toolholder also includes water cooling so the toolholder finishes cool.
A shrink fit toolholding system heats the toolholder to expand the bore, then allows the cooling of the toolholder to shrink the bore around the tool shank and clamp it. Safety is a concern—users wear heavy gloves to avoid contact with a still-hot toolholder. This video from Techniks shows a shrink fit system supplied by the company that addresses that concern. As part of the heater’s cycle, the toolholder disappears briefly into the housing of the unit, where it is soaked with water. The toolholder is cool enough to touch by the time this cycle is complete.
Horn USA has developed quick-change tooling systems to drastically reduce set-up and toolchange times for Swiss-type lathes, including those with through coolant.
A tooling system consisting of interchangeable cutting units and standardized locking units has a lot to offer users of CNC machines, whether for turning, milling, or both on a turn mill. These guidelines will help you think clearly about how modular, quick-change tooling can benefit your shop.
Collet toolholders are too important to the machining process to use them incorrectly. Follow this simple advice.