HMC with Integral Drive Spindle

Makino’s (Mason, OH) a81M HMC—achieving higher MRR and longer tool life in tough materials—will be seen at Westec.

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Makino’s (Mason, OH) a81M HMC—achieving higher MRR and longer tool life in tough materials—will be seen at Westec. Recent testing has yielded significantly increased tool life and greatly improved metal removal rates using the company’s high-torque spindle. The spindle on the a81M has significantly higher torque at low rpm than any other integral drive spindle available. Its proprietary design combines the optimum blend of speed and rigidity necessary to make aggressive cuts, and is the most powerful integral drive spindle on any machine in the world. Features include a rapid feedrate of 1.42 ipm (36m/min) that is able to handle workloads of up to 10, 800 pounds (4,900Kg). The high-torque, integral drive spindle has an available 744 foot pounds (1,009 Nm) of torque from zero to 392 rpm. To match that torque, the spindle employs 50 hp from 2,000 to 5,000 rpm. This duty rating and continuous output of the Makino spindle lends itself to difficult cutting scenarios.