Grob G 800

$1,200,000 - $1,800,000 Updated 2026-03-17

Key Specifications

X / Y / Z Travel

800 mm / 1,000 mm / 800 mm

Rotary Table Diameter

800 mm

Max Workpiece Diameter

1,000 mm

Max Workpiece Height

800 mm

Max Table Load

1,600 kg

Spindle Orientation

Horizontal

Overview

The Grob G 800 is a large-format 5-axis universal machining center that extends Grob horizontal-spindle, swiveling-table architecture to workpiece sizes typical of aerospace structural components, large energy sector parts, and oversized mold and die applications. With X/Y/Z travels of 800 mm x 1,000 mm x 800 mm and a workpiece capacity of 1,600 kg, the G 800 operates significantly above the G 700 in both size and payload, addressing the segment where part scale begins to challenge conventional machining center envelope.

Grob proven horizontal spindle design is maintained on the G 800, providing the same gravity-assisted chip evacuation that makes the G-series preferred in titanium aerospace machining environments. The B-axis swiveling trunnion table provides plus or minus 115 degrees of tilt in combination with the A-axis rotary table continuous 360-degree rotation, enabling full simultaneous 5-axis interpolation at all workpiece positions. The 800 mm table diameter reflects the scale of the machine target applications.

Spindle options for the G 800 include a standard 17,500 rpm HSK-A63 spindle rated at 52 kW, providing the torque density needed for aggressive titanium and nickel superalloy material removal rates at aerospace structural scale. An optional 30,000 rpm spindle addresses high-speed aluminum applications. The 63-position tool magazine expands to 150 tools for complex multi-operation programs.

The G 800 integrates with Grob modular automation systems including the PSS-R pallet storage system and robot cell configurations rated for the heavier pallet loads this machine handles. The Heidenhain TNC 640 and Siemens Sinumerik ONE control options provide full 5-axis programming capability and compatibility with major aerospace CAM systems including Siemens NX, hyperMILL, and Mastercam.

Full Specifications

Parameter	Value
X / Y / Z Travel	800 mm / 1,000 mm / 800 mm
Rotary Table Diameter	800 mm
Max Workpiece Diameter	1,000 mm
Max Workpiece Height	800 mm
Max Table Load	1,600 kg
Spindle Orientation	Horizontal
Spindle Speed (Max)	17,500 rpm (30,000 rpm optional)
Spindle Motor Power	52 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	63 tools (150 optional)
CNC Control	Heidenhain TNC 640 or Siemens Sinumerik ONE

Specifications sourced from grobgroup.com — verified 2026-03-28

Strengths & Limitations

Strengths

800x1,000x800 mm envelope with 1,600 kg table capacity for aerospace structural and energy parts
Horizontal spindle ensures gravity-assisted chip evacuation on long titanium and superalloy programs
52 kW spindle power delivers aggressive material removal rates for aerospace structural roughing
Full simultaneous 5-axis capability maintained across the entire large working volume
Modular automation integration via Grob PSS-R pallet system for extended unmanned production

Limitations

Very high investment ($1.2M+) limits applicability to established aerospace and energy manufacturing operations
Horizontal spindle architecture requires specialized fixturing and programming expertise
Long delivery lead times due to scale and customization typical of large-format Grob machines

Best For

Large aerospace structural components: frames, spars, and engine mounts in titanium and aluminum Energy sector housings, compressor casings, and large valve bodies requiring 5-axis accuracy Large mold and die machining where horizontal chip evacuation preserves cavity surface quality Defense and naval components requiring 5-axis precision at large workpiece scale

Frequently Asked Questions

01 How does the Grob G 800 differ from the G 700?

The G 800 has a larger work envelope (800x1,000x800 mm vs. approximately 700x900x700 mm on the G 700) and a higher table load capacity (1,600 kg vs. approximately 1,000 kg). It also offers higher spindle power (52 kW vs. approximately 40 kW), targeting larger aerospace structural and energy sector applications.

02 Is there a mill-turn version of the G 800?

Yes. The G 800 T variant adds integrated turning capability to the A-axis rotary table via a torque motor, enabling turning operations up to 800 rpm on parts up to 800 mm in diameter. It sits above the G 550 T in Grob mill-turn lineup.

03 Why does Grob use a horizontal spindle on the G 800?

The horizontal spindle orientation allows coolant and chips to fall away from the cutting zone by gravity, preventing chip re-cutting and improving tool life and surface quality in long-running titanium and superalloy programs typical of aerospace structural machining.

04 What automation options are available for the G 800?

The G 800 integrates with Grob PSS-R pallet storage and retrieval systems configured for heavier pallet loads. Robot loading cells and linear pallet transfer systems are also available, enabling high-value unmanned aerospace production runs.

05 What is the spindle power of the Grob G 800?

The G 800 standard spindle delivers 52 kW S1 continuous in HSK-A63, providing the torque required for aggressive titanium and nickel superalloy cutting. A 30,000 rpm high-speed option is available for aluminum structural machining.