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Transform collet chuck into a jaw chuck quickly
A
Leader Chuck Systems product story
Edited by the Manufacturingtalk editorial team
Mar 3, 2004
Mando Adapt and Jaw Adapt can quickly and effectively transform a standard Hainbuch collet chuck into a mandrel for internal workpiece gripping or into a larger capacity jaw chuck.
Award-winning workholding specialist Leader Chuck Systems will be using MACH 2004 to showcase two exciting new products that add an unrivalled level of flexibility to lathe workholding.
Mando Adapt and Jaw Adapt can quickly and effectively transform a standard Hainbuch collet chuck into a mandrel for internal workpiece gripping (Mando Adapt), or into a jaw chuck (Jaw Adapt) that enables larger workpieces - up to almost double the diameter - to be held securely by the same chuck body.
Compared with conventional separate chuck set-ups for multi-turning tasks, Mando Adapt and Jaw Adapt effectively provide users with a three-in-one lathe workholding system to cover all chucking eventualities at relatively lower cost, as well as vastly reduced changeover times.
Designed exclusively for use with the ultra-accurate Hainbuch collet chuck, for which Birmingham-based Leader Chuck Systems is the exclusive UK agent, both systems maintain the high clamping accuracy for which the Hainbuch system is renowned - guaranteed within five microns TIR.
Both products are easy and quick to implement; after removing the chuck's collet, both Mando Adapt and Jaw Adapt accurately locate via a central location/locking screw and tapered ring mechanism.
To revert to normal collet operation, the screw is simply released and the collet re-inserted ready for action.
The chuck body remains untouched and in the machine at all times, which contributes greatly to the systems' high concentricity.
In action on a 100mm long mild steel billet that had previously been bored to 44mm deep on a Hainbuch Combi collet chuck, Mando Adapt was applied for internal location on the workpieces 44mm deep by 50mm diameter bore.
The OD was turned at a surface speed of 250 m/min, a feed rate of 0.3mm and a depth of cut of 4mm; then a series of 10mm wide plunge cuts were made at the end of the bar, at a surface speed of 120m/min and a feed rate of 0.16mm.
There was no discernible difference in cycle time or workpiece accuracy in either operation compared with standard machining methods.
Mando Adapt is currently available for 65mm Hainbuch Combi Pull Back chucks, giving a mandrel clamping range of 20mm to 100mm diameter.
Soft mandrels can also be supplied, which users can machine to suit their specific requirements.
As its name suggests, Jaw Adapt converts a collet chuck into a jaw chuck, enabling a 65mm chuck, for example, to accommodate workpiece diameters of up to 120mm.
Following removal of the standard Hainbuch collet, the chuck collet acts as three master jaws, with serrations aiding location accuracy and stroke adjustment of Jaw Adapt.
Location is again via the central screw.
In tests on a 120mm diameter mild steel bar, OD turning was performed at a surface speed of 250m/min, a feed rate of 0.3mm and depth of cut of 3mm - to the expected high accuracy.
As with other jaw chucks, milling and drilling between the jaws, and behind the front location area, can also be performed.
Jaw Adapt is available for 42mm, 52mm and 65mm Hainbuch Combi Pull Back collet chucks, and standard Jaw Adapt soft jaws can be machined to suit by users.
Leader Chuck System's MACH display will include other examples from its range of high-accuracy Hainbuch collet chucks, which will accommodate workpieces up to 500mm diameter.
These include the Lexon, an economical collet chuck replacement for multi-bore and other styles of collet chucks in bar-fed turning applications.
As well as featuring examples from the company's comprehensive portfolio of own-brand standard CNC power chucks (165mm to 315mm diameter) and self-contained compact static and rotating air chucks (80mm to 315mm) there will also be chucks from Gamet, Hewa, MicroCentric and Zweifel, for which it also holds the exclusive UK agency rights.
In addition, Leader Chuck Systems' display will highlight the company's workholding systems for machining centres, milling machines and grinders - the MultiChuck MMY and new MMYB concentric clamping systems, MultiVice MMX inline vice and MMCC multi-jaw vice systems, and the MMXZ and MMCZ modular vice strips.
MACH 2004 - April 19-23 - NEC Birmingham, UK.
Hall: 5 Stand: 5305.
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