The Hardinge Group has taken the long-standing HLV toolroom lathe to new heights by replacing the mechanical gearbox with an electronic servo motor and threading computer.
This next generation machine design configuration provides 4X the power, 50 per cent more torque and significantly more threading range. There’s no need to purchase gears for different inch or metric threads and left-hand threading is easier. Thread range is .10 to 6.50 mm (4.0 to 250.0 TPI) and up to four multiple-start threads can be machined. A brushless servo motor provides 5 Nm (44 in-lb) of continuous torque to the 8-pitch threading lead screw.
The green 3.2 in. LCD mounted in the Digital Readout case provides visual threading information. The 32-button keypad allows the operator to quickly enter thread data into the threading computer’s 4MB internal memory. A compact Flash socket and USB port are included. The Hardinge digital readout (now standard) provides accurate tool positioning, allowing the operator to cut to “zero” reading. X and Z axis positions appear in the seven-digit display with 40 millionths resolution.
The spindle speed’s four-digit reading also appears in the red LED display. Readout features include set zero mode for each axis, diameter/radius mode (X axis), inch/metric mode and absolute/incremental mode.
The HLV features a high-precision 5C collet-ready spindle with a maximum spindle runout (TIR) of .00065mm (.000025 in.). The preloaded spindle ensures maximum rigidity and sustained accuracy, eliminating end play and radial play for truer turning. Infinitely variable spindle speeds from 100 to 3000 rpm are possible and the 3.7-kW (5-hp) belted drive system provides 20 Nm (15 ft-lb) of torque. The fast and easy lever-operated collet closer provides positive workpiece gripping.
Hardinge offers a wide range of precision spindle tooling to suit any workholding application. The dovetail design of the hand-scraped, full-bearing carriage and bedways provides maximum tool rigidity for high accuracy machining. The tailstock body is of one-piece construction and features a hardened and precision ground #2MT spindle. Easy-reading black and white dials are included on the carriage, cross slide, tool post slide and tailstock.
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