Heavy-Duty, High Accuracy Machining

Absolute Machine Tools, Inc. (Lorain, OH) offers the HMC-630H by Johnford—a 50-taper HMC that has been designed to meet today’s heavy-duty, high accuracy machining requirements.

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Absolute Machine Tools, Inc. (Lorain, OH) offers the HMC-630H by Johnford—a 50-taper HMC that has been designed to meet today’s heavy-duty, high accuracy machining requirements. The HMC-630H’s moving saddle design employs a box-in-box construction keeps the spindle movement confined inside a “box” shaped column casting. Rugged Schneeberger roller type linear slide ways, large pre-tensioned ballscrews, and large Fanuc servo motors ensure high speed rapid traverses and heavy duty cutting capabilities. Pre-tensioning of the ballscrews virtually eliminates thermal expansion of the screws for superior accuracy. Rapid traverse rates are 1575 ipm in all axes. Dual ballscrews and servo motors on the X axis and a stationary ballscrew / rotating nut design on the Y axis eliminate vibration and keep the ballscrew on the centerline of the spindle. A standard 3.54 in. (90 mm) diameter spindle is directly coupled to a Fanuc spindle motor. Direct driving the spindle greatly reduces vibration and minimizes spindle acceleration and deceleration times for fast chip-to-chip times. The spindle produces 35 hp and 260 ft-lb of torque at 500 rpm for high performance at virtually any spindle speed. The 10,000 rpm CAT-50 spindle is oil cooled to minimize thermal growth. An optional Weiss 15,000 rpm HSK-100A integral spindle with 56 hp and 300 ft-lb of torque at 1,000 RPM is also available. The HMC-630H’s 60 station arm-type automatic toolchanger provides fast, reliable tool selection. he rotary type APC unit is standard with 2 rectangular pallets (800 x 630 mm) and 0.001 degree 4th axis contouring ability. A Fanuc 18iM-B control with NANO technology ensures programming power, ease of operation, fast processing rates, and high precision.