Special collet chucks power-operated collet chucks

Nann manufactures special collet chucks for drawback collets in all kinds of different designs and with different chucking ranges. The collet chuck consists of a simple one-section chuck body, which is simultaneously used as a collet sleeve. The draw-back collet is pulled inside the chuck body during clamping, resulting in a light axial movement at the workpiece in the direction of the spindle nose. During unclamping the clamping cylinder pushes the draw-back collet out of the fixture.

When ordering, please specify whether short workpieces are to be fed in from the front, so that the collet can be expanded, especially where automatic loading is involved.

These collet chucks are designed, depending on the application, according to your requirements for standard or special collets. We manufacture these collet chucks for maximum running concentricity. For this, the collet chucks are designed with cylindrical fixtures, and while the collet chuck is being screwed on the entire chuck body can be aligned in the spindle; this gives the collet chuck optimal concentricity. Using special, high-precision collets results in extremely true running accuracy. The collet chuck is operated either via a hydraulic or pneumatic cylinder.

Facts and figures:

• for draw-back collets
• for high-precision collets
• for spindles with rotating hydraulic or pneumatic cylinders
• various sizes and chucking ranges
• cylindrical fixture

Please don’t hesitate to contact us. We will be glad to provide tailormade clamping devices for your requirements.