Grob G 900
This model was not found in Grob's current lineup when we checked on 2026-10-03 . It may be a superseded or older model; the specifications below are as we last recorded them.
Key Specifications
Max Spindle
Spindle Taper
Max Workpiece ⌀
Accuracy
x y z travel
rotary table diameter
How much does the Grob G 900 cost?
Estimated price range
Our best estimate for a 5-axis machining center in this class — not a quote from Grob. Configuration moves it a long way.
Overview
The GROB G 900 is listed as a horizontal-spindle 5-axis machining center for large, heavy parts: 900 mm / 1,250 mm / 900 mm of X/Y/Z travel, a 900 mm rotary table and a table load of 2,500 kg. This table could not be traced to a manufacturer source. What follows reasons from the listed figures only, and a buyer should ask for the original technical data before relying on any of them.
Weight capacity is the headline. 2,500 kg on a 900 mm table is a lot of mass to swivel, and the part itself may reach 1,250 mm in diameter and 900 mm in height, wider than the table it sits on. The Y travel of 1,250 mm matches that diameter. Swivel range is listed as +/-115 degrees on the B axis with 360 degrees (continuous) on the A axis, and positioning accuracy as +/-0.005 mm.
Against that size the spindle row is small in interface: HSK-A63, 17,500 rpm and 60 kW (S1), with no torque figure and no alternative spindle in the table. The larger G1050 is listed with HSK-A100, so anyone planning big face mills or long boring bars on a G 900 should find out which spindle the machine was built with. Tool storage is 80 tools as listed, 200 optional. Maximum feed rate is 50 m/min, and the control is given as Heidenhain TNC 640 or Siemens Sinumerik ONE.
Full Specifications
| Parameter | Value |
|---|---|
| X Y Z Travel | 900 mm / 1,250 mm / 900 mm |
| Rotary Table Diameter | 900 mm |
| Max Workpiece Diameter | 1,250 mm |
| Max Workpiece Height | 900 mm |
| Max Table Load | 2,500 kg |
| Spindle Orientation | Horizontal |
| Max Spindle Speed | 17,500 rpm |
| Spindle Motor Power | 60 kW (S1) |
| Spindle Taper | HSK-A63 |
| B Axis Swivel Range | +/-115 degrees |
| A Axis | 360 degrees (continuous) |
| Feed Rate Max | 50 m/min |
| Tool Magazine Capacity | 80 tools (200 optional) |
| Positioning Accuracy | +/-0.005 mm |
| CNC Control | Heidenhain TNC 640 or Siemens Sinumerik ONE |
Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.
Strengths & Limitations
Strengths
- 2,500 kg listed table load, for castings and fixtures that smaller 5-axis tables cannot carry
- Workpieces up to 1,250 mm in diameter and 900 mm high within 900 mm / 1,250 mm / 900 mm of travel
- 60 kW (S1) spindle power at up to 17,500 rpm
- Positioning accuracy listed as +/-0.005 mm
- 80 tools as listed, with 200 available as an option
Limitations
- Unverified table: none of the figures could be checked against a manufacturer source
- HSK-A63 is the only interface listed, on a machine sized for 2,500 kg parts; the G1050 is listed with HSK-A100
- No torque, machine weight or footprint is given, so cutting capacity and installation cannot be planned from this table alone
Best For
Frequently Asked Questions
01
The listed table load is 2,500 kg on a 900 mm rotary table, with a maximum workpiece of 1,250 mm in diameter and 900 mm in height. Count the fixture in that weight. The figure is unverified, so confirm it on the machine's own data plate or manual.
02
Yes. The table shows HSK-A63 with 17,500 rpm and 60 kW (S1), and no optional spindle. It gives no torque figure. If the work calls for large-diameter cutters, check what the machine in question actually has before committing.
03
80 tools as listed, with a 200-tool magazine as an option. Tool length, diameter and weight limits are not in the table and depend on the magazine fitted to the individual machine.
04
Positioning accuracy is listed as +/-0.005 mm. The B axis swivel range is +/-115 degrees and the A axis is 360 degrees (continuous). Maximum feed rate is 50 m/min. No rapid traverse figure is given separately.
Videos
GROB-WERKE GmbH & Co. KG
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