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The HC 400 HMC from Doosan is a compact, high-precision, machine with performance enhancing features included as standard that make it an optimal solution for OEMs and job shops, the company says. A Meehanite cast iron bed, large linear roller guideway, and inline 30/35 hp, 10,000-rpm spindle enable heavy cuts on the toughest materials, with superior surface finishes and excellent long-term accuracy.
To minimize setup time and increase productivity, the Doosan HC 400 is equipped with an automatic pallet changer featuring twin tapped pallets. Each pallet measures 15.7” x 15.7” and can handle a maximum load of 882 pounds. All axes are driven by high-precision, double-nut ballscrews supported on both ends by angular contact thrust bearings. This double pretension design provides outstanding positioning repeatability. Axis travels are 23.62” in X, 22.05” in Y, and 22.24” in Z. Maximum cutting feed rate is 787 ipm, with rapid traverses to 1,574 ipm.
At the heart of the Doosan HC 400 is a high-precision 35-hp, 10,000 rpm inline spindle. Designed for high stock removal and deep drilling operations, the machine is equipped with through-spindle coolant and an oil-cooled spindle chiller, which maintains a constant temperature at high speeds.
The HMC features a 60-pocket cam-type, swing-arm automatic tool changer. Its random access operation ensures instant tool availability, even with short cutting cycles. The cam-actuated arm provides fast, reliable tool changes in 1.5 seconds tool-to-tool and 4 seconds chip-to-chip.
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