Offers new level of flexibility
March 1st 2004 On show for the first time in the UK at MACH 2004 will be two new lathe workholding products from Leader Chuck Systems, the Mando Adapt and the Jaw Adapt. The company has high hopes for the products and is again looking towards the exhibitions product innovation awards to recognise its achievements
Workholding specialist Leader Chuck Systems will be using MACH 2004 to showcase two new products that add new 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 for use with the Hainbuch collet chuck, both systems maintain the high clamping accuracy for which the Hainbuch system is known - guaranteed with five microns TMR.
Both products are easy and quick to implement; after removing the chucks collet, both Mando Adapt and Jaw Adapt accurately locate via a cental 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, that contributes greatly to the systems high concentricity.
In action on a 100mm long mild steel billet that had previously been bored to 44mm depth on a Hainbuch Combi collet chuck, Mando Adapt was applied for internal location on the workpieces 44mm deep by 50mm dia bore.
The OD was turned at a surface speed of 250m/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 dia. 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 dia 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 dia 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 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 42, 52 and 65mm Hainbuch Pull Back collet chucks and standard Jaw Adapt soft jaws can be machined to suit by users.
Leader Chuck Systems MACH display will include other examples from its
range of high accuracy Hainbuch collet chucks, which will accommodate workpieces up to 500mm dia. 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 companys portfolio of own-brand CNC power chucks (165 to 315mm dia) and self-contained compact static and rotating air chucks (80 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 companys 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.
See Leader Chuck Systems at MACH 2004, Hall 5 stand 5305 More articles from Wildish Communications Ltd: | 
