Hardinge Conquest H51

The Hardinge Conquest H51 is a 51 mm (2.0 in) bar-capacity turning centre with an 8 in chuck, an A2-6 spindle nose and a machine weight of 6,804 kg (15,000 lb). That weight is the first thing to notice in the listed figures: it is a lot of iron for a lathe with a 15 kW (20 hp), 5,000 RPM spindle, and mass is what keeps a lathe steady on fine finishing and hard turning cuts. The model is absent from Hardinge's current product pages, so verify the figures against the individual machine.

Maximum turning diameter is 312 mm (12.3 in). X travel is 171 mm (6.75 in) and Z travel is 581 mm (22.87 in), with both axes rapid at 16 m/min (630 ipm). The listed maximum turning length, 648 mm (25.5 in), is longer than the Z travel, so do not assume the full length can be turned in one pass with one tool; measure the usable stroke with the workholding you intend to use.

The turret has 12 stations and half-indexes to 24 positions, which lets tools be mounted between the main stations when clearances allow. Station-to-station index time is 0.23 sec. On parts with many short operations the index time is a real share of the cycle, and this one is quick.

Three controls appear in the table, Fanuc 0iD, Siemens 840D, or Mitsubishi M720V, so a used machine has to be identified by the control actually fitted. Coolant tank capacity is 151 L (40 gal). No spindle torque, tailstock or live tooling figure is listed.