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C.R. Onsrud’s HM hybrid mill combines the accuracy and rigidity of a CNC mill with the large work volume and high machining speeds of a router. The five-axis machining center is configured with dual tables, eliminating load/unload time. It also has the ability to electronically lock the two tables together for machining large parts. The optional Dual Process technology enables independent, simultaneous programming of each table for added flexibility. The company says that the machine answers demand for a machine that handles a large work volume at high speeds but doesn’t incur the expense of a large traditional milling machine.

The machine is available in two configurations, with nominal 8- or 12-ft. bed widths. The F98HM features X, Y and Z axes measuring 60" × 98" × 41"; the F148HM’s X, Y and Z axes measure 60"/72" × 144" × 169". The series features 15-hp, 24,000-rpm spindles with 24- and 33-hp options). It is equipped with either a FANUC 31i or Isai Open CNC. For tool management, the series uses a 24-position quick-change system, with toolchanger options with 100 or more tool positions. Material clamping is performed via vacuum hold-down, with optional fixture plate or T-slot tables. A chip pan or optional chip conveyor takes care of chip handling. Other options include inkjet part marking, automatic tool measurement, robotics integration, a continuous C axis and linear scale feedback.