Gurutzpe GSM 16

Torque defines the Gurutzpe GSM 16. Its turning headstock is listed at 27,525 / 36,700 Nm (20,302 / 27,070 lb-ft) at S1-100% / S6-60%, the highest figure in the GSM turnmill range, on a swing of Ø 1,600 mm (63.0 in) and up to 13,000 mm (511.8 in) between centers.

The motor is no bigger than the GSM 13's: both are rated 102 / 130 kW (136.8 / 174.3 hp). The extra torque is paid for in speed. This size is listed at 1,200 / 700 rpm, so it is geared for large diameters and heavy sections, and small journals on a long shaft will be cut slowly. Workpiece weight between centers comes in three classes, 10,000 / 15,000 / 20,000 kg (22,046 / 33,069 / 44,092 lb).

Parts of this size are rarely finished with standard tools alone, and the magazines reflect that. Beside the tool magazine with 50 / 80 / 100 posts, the table lists an accessories magazine over the headstock, with up to 4 automatic sliding posts for accessories of max. Ø150 mm and 2300 mm length. A heads pick-up magazine on the right end of the tailstock holds up to 4 heads and a boring bar of max. Ø200 mm and 3200 mm length. Gurutzpe points out that the magazine over the headstock does not increase the footprint.

Milling figures are the same as on the smaller sizes: a B-axis head swivelling ±110°, in four versions up to 85 kW or 18,000 rpm. The Y-axis guiding is hydrostatic. Gurutzpe's table prints no usable Y-axis stroke for this size, and the page gives no machine weight, so both belong on the list of questions for the maker. Chips fall vertically to the conveyor from a bed without blind pockets.