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Home » MHI Grinder Hones Four Times Faster

MHI Grinder Hones Four Times Faster

September 30, 2009

The ZI20A from Mitsubishi Heavy Industries is an internally toothed ring gear grinding machine capable of high-speed and precision with low noise operation. The grinding speed, or sliding velocity, is four times faster than that oaf conventional grinding due in part to MHI's barrel-shaped multi-threaded grinding wheel made of cubic boron nitride (cBN) that attaches to the main spindle.

Longer grinding tool life is one benefit along with a 1/6-reduction in grinding tool cost per workpiece, which is comparable to the cost of preheat processing. The machine also features a synchronous control technology that produces high-speed grinding through fast spindle rotations-15,000 rpm for the main spindle that rotates the grinding wheel and 6,000 rpm for the workpiece spindle.

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