Grob G550

What the maker publishes about the current Grob G550

GROB's G550 is a 5-axis universal machining center with a horizontal motorized spindle. Three linear axes and two rotary axes give 5-sided machining and 5-axis simultaneous interpolation, and its tilting rotary table swivels through 230 degrees on A and 360 degrees on B. Working travels are 800/1,020/970 mm in X, Y and Z, with axis speeds up to 65/50/80 m/min. The table is 770 mm in diameter and carries 700 kg on a pallet or 800 kg without one, and the interference diameter is 900 mm. Chip-to-chip time is 2.8 s to VDI 2852, and positioning is specified to within 0.006 mm. Spindle choices range from HSK-A100 units at 6,000 rpm to an HSK-A63 unit at 30,000 rpm. A pallet clamping table, or a table with only an A or only a B axis, is optional. Its GROB 4 Pilot panel pairs with a SIEMENS 840D sl or a HEIDENHAIN TNC 640 CNC. Total weight is 24,800 kg without a pallet changer and 27,500 kg with one.

Source: GROB, October 23, 2026.

What the Grob G550 is used for

GROB's G550 page shows parts cut on it: an aluminum aerospace part, a suspension part for prototype work, an aluminum automotive knuckle, a steel drill bit and a tool steel mold insert, and it tags the machine for aerospace, automotive, energy and die and mold work.

Source: GROB, October 23, 2026.

Grob G550 specifications

Figures as currently published; an older unit may differ in control generation and options.

1. manufacturer specification page, fetched October 23, 2026.

What to check on a Grob G550

• Control generation. The manufacturer specifies SIEMENS 840D sl or HEIDENHAIN TNC 640 for this model. Units we have tracked run 2011 to 2017; an early one may carry an older control or a retrofit.
• Spindle. The manufacturer gives a spindle speed of 30,000 rpm (fastest listed spindle version (HSK-A63, 63 Nm); spindle versions are a choice). Run the spindle to top speed and listen for bearing noise.
• Axes and way covers. The manufacturer gives X 800 mm, Y 1,020 mm and Z 970 mm of travel. Run each axis end to end and check the way covers.
• Rapids and ballscrews. The manufacturer gives a rapid traverse of 65/50/80 m/min (X/Y/Z axes). Measure the backlash on each axis.
• Tool-change time. The manufacturer gives a chip-to-chip time of 2.8 s (according to VDI 2852). Time a tool change against that.
• Table. The manufacturer gives a table size of 770 mm (diameter) and a table load of 700/800 kg (with/without pallet). Check the table and its T-slots for damage.
• Rotary axes. The manufacturer gives 5 (three linear, two rotary; 5-axis simultaneous interpolation) axes and Swivel range 230 degrees (A), 360 degrees (B). Run each rotary axis through its range.
• Rigging and floor. The manufacturer gives a machine weight of 24,800/27,500 kg (without/with pallet changer). Confirm the rigging route and the floor will take that.

Grob G550 control and documentation

• Control SIEMENS 840D sl or HEIDENHAIN TNC 640 (GROB 4 Pilot control panel)

GROB says the technical documentation for a GROB machine is reached through its GROB 4 Care parts webshop, which needs an account.

Source: GROB, October 24, 2026.

When the Grob G550 was built

GROB's company milestones say the G550 was introduced to the trade press in 2009.

Source: GROB, October 27, 2026.

Grob G550 listing history

Where it was listed

Filed under CNC Horizontal Machining Centers (HMC) (5), CNC 5-Axis Machining Centers (4) and CNC Vertical Machining Centers (VMC) (4).

Model years seen

2017 ×3, 2016 ×2, 2014 ×2, 2013 ×2, 2012 ×2, 2011 ×2.

What Grob G550 listings agree on

What affects the value of a used Grob G550

• Options. The units we tracked split on spindle speed (10,000 RPM on 4 machines, 16,000 RPM on 3 machines, 12,000 RPM on 2 machines), spindle power (26 kW on 4 machines, 43 hp on 2 machines), spindle taper (HSK-A100 on 3 machines, HSK-A63 on 2 machines) and tool capacity (120 on 4 machines, 60 on 2 machines).
• Control. The manufacturer specifies SIEMENS 840D sl or HEIDENHAIN TNC 640.
• Build year. The units we tracked were built from 2011 to 2017, across 6 model years, most often 2017 (3 units).
• Against the published figures. The manufacturer gives max spindle speed 30,000 rpm (fastest listed spindle version (HSK-A63, 63 Nm); spindle versions are a choice), X-axis travel 800 mm, Y-axis travel 1,020 mm and Z-axis travel 970 mm.

Looking for a Grob G550 for sale?

We have tracked 15 Grob G550 listings on 5 marketplaces (exapro.com, equipt.com, machinetools.com, surplusrecord.com and resellcnc.com), model years 2011 to 2017. We buy Grob G550 machines and do not sell them.

2017 · 2017 · 2017 · 2016 · 2014 · 2013 · 2013 · 2012 · 2012 · 2011 · 2011

Every Grob G550 we have tracked

2 more listings, no year.

The Grob G550 among machining centers and mills

Browse all CNC Horizontal Machining Centers (HMC), or see every Grob machine we track.

Grob G550 variants and related models

1. Grob G500: manufacturer specification page, fetched October 27, 2026.
2. Grob G550: manufacturer specification page, fetched October 23, 2026.