German lathe manufacturer Index has developed a new twin-spindle turn-mill centre with 76 mm bar capacity, 230 mm chuck diameter and a turning length up to 900 mm. The Traub TNX220 has a vibration-damping mineral cast bed and generously dimensioned linear guideways in the X and Z axes, a combination that delivers accurate machining and high productivity. UK availability is via Kingsbury.

With a Y/B-axis tool spindle rated at 40 kW/207 Nm/6000 rpm above the work spindle centreline, and two 12-station (VDI30) or 15-station (VDI25) live turrets below, the lathe is suitable for the one-hit machining of complex parts in cycles that can include five-axis milling.

A magazine with 139 positions for HSK-T63 or HSK-T40 cutters serves the top tool carrier. The magazine is accessible from the front and the rear, from where it is possible to replenish one of the two magazine chains while the other is in use.

Notably, the two lower tool carriers also have Y-axis movement in addition to X- and Z-axis travels, and every station is driven. All tool carriers can operate simultaneously at either of the identical, fluid-cooled main and counter work spindles, which also carry a rating of 40 kW/207 Nm/6000 rpm.

Automation options include an Index MBL 76 bar feeder, tailored to match the new machine design and quick to change over to a new size of stock. The loader offers good damping properties and easy set up. As a purely electric solution, there is no requirement for hydraulics.

An integrated gantry-type loader with a double gripper and/or an Index iXcenter robot cell provides automatic load/unload of billet or shaft parts. The control system is a modified Mitsubishi TX8i-s V8.
For further information www.kingsburyuk.com