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The Hi-Net DMC-1600HN by Johnford is suited for manufacturers demanding speed, rigidity and precision in a double-column machining center. Absolute Machine Tools offers this 45,000-lb bridge mill, which is engineered for high speed, net-shape machining of complex 3D parts such as those found in the mold/die and aerospace industries.
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The center accommodates a variety of materials at high feed rates and with a high degree of accuracy, the company says, adding that the Meehanite castings provide strength and vibration dampening for quality听surface finishes and long cutting tool life. The columns and bridge are a one-piece casting to add rigidity. A Z-axis head and Y-axis saddle feature square box ways and diagonally arranged ribs to minimize distortion.
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To further add to rigidity, the machining center features a moving table/fixed-column design as well as听a 90-degree bridge with offset Y-axis ways and a wide saddle to听keep the spindle center line close to the bridge. X-axis table traverse is accomplished via Schneeberger roller linear ways for accurate positioning of heavy workpieces. Large-diameter, pretensioned ballscrews are directly coupled to the servomotor.听The bridge mill has XYZ axis travels of 63" 脳 51" 脳 32" and rapid traverse听rates of 590 ipm in the X and Y axes and 472 ipm in the Z axis.听It can accommodate听table loads as heavy as 13,200 lbs.
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