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A combination of a robust design, thermal compensation and scales on axes in SNK’s Nissin HBM BHP130-3.5 series horizontal boring and milling machine is designed to produce high cutting accuracy.
The machine features a cast iron construction, scale feedback of the worm and wheel, and large worktables with nine T-slots to simplify work fixturing. Extra-wide solid box ways, finished with the company’s “mirror surface finish” technology, accommodate large parts, and oversized ballscrews on all linear axes provide precise positioning in demanding machining conditions.
A 5.1"-diameter boring spindle performs at speeds ranging from 5 to 3,500 rpm and travels within a 7.08" milling spindle to provide a full 90.5" stroke. A built-in rotary table provides a fifth axis of operation and positioning control within 0.001 degree.
To further enhance precision, thermal growth sensors are positioned around the spindle casting and bearing to continually read temperatures (within microns) in five areas. This reduces the risk of false readings and ensures accurate compensation, the company says.
The machine’s 70.8" × 98.4" table can accommodate loads as heavy as 44,000 lbs. X-, Y-, Z- and W-axis stroke measures 138" × 98" × 63" × 27.5", respectively, and X-, Y-, Z- and B-axis scale feedback is standard. A 60-tool ATC features a pneumatic pedal to ease tool loading and unloading.
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