Takamaz GSL-15 PLUS

The Takamaz GSL-15 PLUS is a single-spindle chucker for parts up to 150 mm (5.91 in) in turning diameter, held in an 8 in collet chuck and cut from an 8-station turret. The spindle is rated 7.5 / 5.5 kW and runs to 3,500 rpm, and the strokes are short: 160 mm (6.3 in) on X and 330 mm (13 in) on Z. Flanges, hubs, caps and other short parts made by the thousand are its natural work.

The defining figure is the 150 mm diameter set against a 3,500 rpm ceiling. At the top of that range a turning tool reaches a high surface speed well before the spindle runs out, so the limit there is the 7.5 / 5.5 kW rating and the depth of cut it supports. As parts get smaller the ceiling starts to matter, and below a certain diameter the spindle can no longer keep the tool at its best cutting speed. The spindle bearings have an inner diameter of Ø100 mm, the larger bearing set for a machine of this size.

In plan the machine is 1,875 × 1,680 mm (W × L), and the width becomes 1,990 mm when a tailstock is fitted. The spindle centre stands 980 mm (38.6 in) above the floor, the height at which parts are passed in on every manual load. Rapid traverse is 18 m/min on X and 24 m/min on Z, so the travel between cuts is a small share of a short cycle.

The AT-1 is built on the same 160 mm X and 330 mm Z strokes with the same 8-station turret and 7.5 / 5.5 kW rating, but runs to 4,500 rpm on a Ø85 mm spindle bearing. For mostly small-diameter work the AT-1 is the closer fit; the GSL-15 PLUS makes sense when parts sit towards its 150 mm limit and an 8 in collet chuck is the workholding the job needs.