Hardinge RS-51 MSY

The Hardinge RS-51 MSY takes 51 mm (2.0 in) bar and turns parts up to 310 mm (12.2 in) in diameter and 530 mm (20.87 in) long, with a main spindle, a sub-spindle, a Y-axis and live tooling in a 12-station turret. At 5,500 kg (12,125 lb) it is a substantial machine for that bar size.

Start with the length. Z travel is 530 mm (20.87 in), the same as the maximum turning length, which is generous for a twin-spindle machine of this capacity. It leaves room for longer parts cut from bar, and for the sub-spindle to draw stock well clear of the main spindle before cut-off. X travel is 175 mm (6.89 in) and Y travel 50 mm (1.97 in), enough for flats and cross-drilled patterns set off the centreline of a 51 mm part.

Both spindles top out at 5,000 RPM and both have a C-axis. The main spindle has 15 kW (20 hp) on an A2-6 nose, the sub-spindle 7.5 kW (10 hp). Live tools turn at up to 6,000 RPM, faster than either spindle, which helps small drills and end mills reach a workable cutting speed. Torque is not listed for the spindles or the driven tools.

Rapid traverse is 20 m/min (787 ipm) in X and Z, and the control is listed as a Fanuc 0i-TF Plus. The table says nothing about chuck size or guideways.