Used Grob Machining Centers for Sale 16

Grob built its name machining engine blocks and transmission housings for nearly every major carmaker, and the G series brought that production engineering into universal five-axis machines. The architecture is the differentiator: a horizontal spindle combined with a tunnel-shaped work area lets the machine swallow tall parts, machine with short rigid tools, and drop chips straight down, three things conventional trunnion five-axis verticals struggle with. For aerospace structural parts, impellers, and complex housings, a used G350 or G550 delivers genuinely industrial five-axis capability.

The automotive transition matters for used buyers: as powertrain lines convert away from combustion components, well-maintained Grob machines have been reaching the secondary market in unusual numbers, often with documented service by Grob themselves. Pricing remains premium, typically above used DMG Mori or Heller equivalents, but the gap to new Grob machines is enormous, which is the real comparison for shops needing this class of machine.

Buying a used Grob machining centers: what to check

Five-axis geometry defines value: request a recent kinematic measurement protocol (Grob service produces these) and verify A and B axis backlash and repeatability. Machines from engine plants may have run a single part for years, so ask for the production history; uniform wear from one operation differs from varied-use wear.

Inspect the spindle (HSK-A63 or A100) for taper condition and documented rebuilds, and cycle the pallet changer and tool magazine, which on production units can hold 100+ tools, through complete sequences. Confirm Siemens 840D sl machine data, compensation tables, and any Grob software options transfer with the machine. Review chip conveyor and high-pressure coolant systems, which work hard in powertrain duty. Verify the A and B axis backlash on G-series universal machines with a dial indicator if possible, since the tunnel-design rotary axes are precise but expensive to rebuild.

On Exapro, used Grob listings show model, pallet size, control, photos, and location. Compare available machines and submit an enquiry through the listing page on Exapro to request measurement protocols and arrange inspection.