GROB G150

The G150 and DMU 40 eVo target the same compact 5-axis segment but take different design approaches. The G150 uses a horizontal spindle with trunnion A/B axes, while the DMU 40 eVo uses a vertical spindle with swivel rotary table. The GROB's horizontal spindle provides better chip evacuation and is easier to automate with pallets. The DMU 40 eVo offers slightly more Y-axis travel and a broader range of spindle options. Pricing is comparable at $350K-$500K.

Yes, automation is a core strength of the G150. GROB offers their PSS-G pallet storage system that can serve multiple G150 machines from a central robot or linear pallet system. The machine's standard pallet interface, horizontal spindle, and compact footprint make it one of the easiest 5-axis machines to integrate into automated production cells. Many aerospace and medical shops run G150 cells with 6+ hours of unattended operation.

The standard spindle is an HSK-A63 motorized spindle running at 18,000 rpm with 16 kW continuous power. For high-speed machining of aluminum and graphite, GROB offers a 30,000 rpm HSK-E40 spindle option. The HSK-A63 spindle is preferred for steel and titanium work where torque matters, while the HSK-E40 is ideal for electrode machining and aluminum aerospace parts.

The G150 specifies positioning accuracy of +/- 0.004 mm on all linear axes. In practice, volumetric accuracy in 5-axis simultaneous mode depends on proper calibration of all rotary axes. GROB uses their own calibration routines and the machine's thermal stability helps maintain accuracy over long production runs. Shops regularly achieve part tolerances of +/- 0.01 mm in 5-axis production on the G150.

Yes, the G150 handles titanium effectively thanks to its rigid construction, horizontal spindle, and adequate spindle torque at the HSK-A63 interface. The 16 kW spindle provides enough power for reasonable material removal rates in Ti-6Al-4V, and the horizontal configuration keeps chips clear of the cut. For heavy titanium roughing, the larger G350 with its higher-torque spindle options may be more appropriate.

With the spindle oriented horizontally, gravity pulls chips away from the cutting zone and workpiece naturally. This eliminates chip re-cutting, reduces tool wear, improves surface finish, and prevents chip packing in deep pockets — a common problem on vertical-spindle 5-axis machines. The benefit is most pronounced when machining deep cavities, internal features, and pocketed aerospace parts where chip evacuation is critical to part quality.