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Workpiece clamping \ Technical introduction – lathe chucks

Clamping jaws

Clamping jaws are the only interfaces between workpiece and chuck and therefore the key component for greater productivity and effi ciency. Using the correct

clamping jaw not only guarantees perfect power transmission and secure workpiece clamping, it also ensures optimal utilisation of machine and tool performance.
Clamping jaws are usually hardened. In order to achieve a high degree of concentricity, they must be ground down to the lathe chuck. The exceptions are block jaws,
segment jaws and in some cases special jaws. These jaws are “re-machined” by the user to the desired contour. They allow for clamping of product-specifi c contours
and damage-free clamping for machining fi nished parts. Hard clamping jaws run the risk of form closure during fi nished part machining.
That means that possible imprints may be le on the workpiece. This is desired for claw jaws or profi led clamping jaws. They are used solely for the purpose of
clamping unmachined parts. The form fi t produced between the clamping jaw and unmachined part provides secure clamping properties for high cutting forces that

usually occur when clamping and rough machining unmachined parts. Clamping jaws and lathe chucks from different manufacturers are rarely compatible with one
another. To determine the appropriate clamping jaw or plain jaw, various information is required. Chuck manufacturer, chuck type, chuck diameter and, if applicable,
interface of the jaw with groove width and hole spacing. If slot and tenon or pointed teeth (1/16” x 90°; 3/32” x 90°; 1.5 mm x 60°; 3 mm x 60°).
Block jaws: Plain and interchangeable jaw grips, slot and Interchangeable jaw grips, pointed teeth:
tenon:

Drilling jaw, outwardly stepped, hardened Plain jaw with fastening screw Unstepped interchangeable jaw grip, unhardened

Drilling jaw, outwardly stepped, hardened Plain jaw with fastening screw Stepped jaw attachment, hardened

Drilling jaw, outwardly stepped, hardened Plain jaw with fastening screw Segmented jaw, unhardened

Plain jaw with fastening screw Claw jaw, hardened

Plain jaw with fastening screw

Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com
Availability subject to country specific rules and regulations. 379

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