The Bomac Authon LUC 330 is a used lathe — sometimes referred to as a turning lathe or engine lathe — designed for precision metal-turning operations including facing, boring, threading, and cylindrical turning. Lathes of this class are workhorses of general machining, toolroom, and heavy fabrication environments, capable of handling a wide range of ferrous and non-ferrous materials.
This machine offers a centre height over the bed of 330 mm, with a maximum turning diameter over the carriage of 408 mm and a maximum turning diameter over the bed of 640 mm. A gap-bed configuration extends the maximum turning diameter further still, to 899 mm, making it suitable for larger-diameter workpieces such as flanges, pulleys, and discs that would otherwise exceed the standard swing. The distance between centres is 2,000 mm, giving the machine a generous working length well suited to shafts and elongated components.
The spindle runs at variable speeds ranging from 18 to 1,500 rpm, allowing the operator to select an appropriate cutting speed for a broad range of materials and diameters. The spindle bore diameter is 105 mm, accommodating bar stock of considerable size for through-spindle work, and the spindle nose is finished to ASA 11 inch, a standard that supports a wide selection of chucks and face plates.
The tailstock is fitted with a Morse Taper 5 (MT5) socket, suitable for heavy-duty centres, drills, and reamers. The quill diameter measures 90 mm and provides 250 mm of travel. Cross-slide travel is 275 mm, giving adequate reach for facing and profiling operations across the workpiece diameter.
Power is supplied by a 15 hp main motor. The machine weighs 3,450 kg, reflecting the robust cast-iron construction typical of heavy-duty lathes in this capacity range. This unit is currently located in Italy and is offered in used condition.
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