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Machining center for frame structure and chassis parts
The GROB G520F machine concept guarantees customers in the automotive industry flexible and precise 5-axis machining of frame structure and chassis parts, as well as battery housings.
As a stand-alone system or machining center linked to other machines, the two-spindle G520F is able to cut two parts in parallel in the shortest time possible – high dynamics and ideal chip transport included.
Technical data
Working travels
in X-/Y'-/Z-axis (mm)
Max. speeds
in X-/Y'-/Z-axis (m/min)
Interference diameter
2 x 1,200
All technical data
Chip-to-chip time t1
according to VDI 2852 (s) relative to speed (rpm)
Positioning accuracy
in X-/Y‘-/Z-axis (mm)
Total weight
without/with pallet changer (kg)
Table load
(kg) (without/with palett)
The benefits at a glance
checkboxBest chip fall
checkboxHigh dynamics
checkboxHigh manufacturing flexibility
checkboxHigh machining accuracy
checkboxCustomer-specific part loading
checkboxAs a stand-alone machine or linked in the system
checkboxSuitable for MQL machining operations
checkboxShort chip-to-chip times
Machine concept
Axis arrangement

The axis combination is based on the tried and proven G-series GROB machine concept with horizontal spindle position and guarantees free chip fall and optimized heat dissipation.

Modular configuration

The modular and standardized machine components guarantee the best possible GROB product quality.

Individual automation

Available with manual or automatic front loading or automatic top loading, and optionally with integrated pallet changer.

Two spindles

Two-spindle machine for machining two parts in parallel.

Technology down to the finest detail
Chip disposal

Uninterrupted part machining with chip disposal by a scraper-type conveyor

Horizontal motorized spindle

For meeting the toughest cutting requirements

Electrical cabinet

Optimized access and simple orientation for preventive maintenance and inspection

Chip disposal

Uninterrupted part machining with chip disposal by a scraper-type conveyor

Horizontal motorized spindle

For meeting the toughest cutting requirements

Electrical cabinet

Optimized access and simple orientation for preventive maintenance and inspection

Typical machining operations
Side rail
MaterialAluminium alloy
Motorized spindle18,000 rpm
Power/torque29 kW/34.6 Nm
Suspension strut dome
MaterialAluminium alloy
Motorized spindle18,000 rpm
Power/torque29 kW/34.6 Nm 
Battery tray
MaterialAluminium alloy
Motorized spindle18,000 rpm
Power/torque29 kW/34.6 Nm 
MaterialAluminium alloy
Motorized spindle12,000 rpm
Power/torque40 kW/161.4 Nm 
MaterialAluminium alloy
Motorized spindle18,000 rpm
Power/torque20 kW/26 Nm 

Spindle versions

Besides the broad range of spindles, the motorized spindles designed and produced by GROB itself are the preferred choice for optimized process design. These are optimally matched to the G520F and have optimized quality features.

Motorized spindle versions
  • HSK-A63, 47 Nm, 12,000 rpm 
  • HSK-A63, 47 Nm, 18,000 rpm 
  • HSK-A63, 83 Nm, 12,000 rpm
  • HSK-A63, 86 Nm, 17,000 rpm
  • HSK-A100, 185,5 Nm, 12,000 rpm
  • HSK-A100, 340 Nm, 10,000 rpm 
GROB Spindle Diagnostics (GSD)

GROB spindle diagnostics is a system that automatically monitors the condition of the motorized spindle. Benefits are a prolonged motorized spindle useful life, reduced tool wear and scheduled maintenance.

GROB Chip-in-Spindle Detection System (SiS)

This system is able to detect at an early stage tool clamping faults caused by chips between the plain surface and the spindle nose from 10 μm. So the machining process is optimized and rejects and damage are avoided.

Tool magazine

  • Single disk-type tool magazine


  • Double disk-type tool magazine

Control systems

Choose between modern and powerful CNC control systems from market leaders for the G520F.

Automation solutions

Draw on the experience we have garnered over several decades and benefit from the automation technology we tailor to meet your needs.

2-way/4-way pallet changer system
2-way/4-way pallet changer system

Use the GROB pallet changer system to increase your productivity by retooling during machining time.


Pallets are interchanged between setup station and work area by means of a rotating pallet changer. A high degree of process reliability during the pallet change sequence is guaranteed by an integrated seating check system and by flushing the zero point system.

2-way/4-way pallet changer system



  • Loading and unloading of the parts to the machine setup station during the machining operation
  • 2-/4-way pallet changer system compactly integrated into the machine
  • Optimum accessibility to the setup station
  • Fast exchange of pallets between work area and setup station
  • Integrated seating check system for the pallets
  • Wide-opening setup station doors with crane loading capability
Loading systems
Loading systems

The G520F is designed for efficient work area loading. All loading devices are GROB proprietary developments, and so the individual components are guaranteed to be optimally matched.

Loading systems

Top or front loading:


  • Robot


Top loading:


  • Cartesian linear gantry
  • Cartesian linear gantry with telescope


Front loading:


  • Swiveling changer
Transportation and automation components
Transportation and automation components

Together with the GROB automation system, the transport and automation components create a module from which complex automation systems can be combined. The high degree of standardization ensures the best possible price/performance ratio and a high degree of technical optimization.

Transportation and automation components
  • Automation system
  • Lifts
  • Swivel conveyors
  • Rotary tables
  • Lift transverse units
  • Swivel units
  • Storage systems
  • SPC stations
  • Zero-point clamping systems
  • Adapter plates


Our extensive range of accessories makes the G520F more flexible, while increasing your own productivity and economy at the same time.

Continuous cooler
Continuous cooler
  • An external continuous cooler for cooling the cutting fluid
  • Available for all high-pressure cutting fluid pumps
Camera systems
Camera systems
  • Camera solutions for industrial automation and for inspection tasks
  • Consisting of individual components such as lenses, lighting units, image sensors and software
High-pressure cutting fluid system
High-pressure cutting fluid system
  • Standard version: 23 bar high-pressure cutting fluid pump, including On/Off functionality
  • Additional versions for higher pressure requirements: 5–38 bar/10–80 bar high-pressure cutting fluid pump
  • Option of an additional cooling unit for all high-pressure cutting fluid systems
Decentralized work area mist collecting system
Decentralized work area mist collecting system

Emulsion mist separator with the option to realize an integrated pre-separator stage, a regenerative filtration stage and an integrated post-filter stage with controllable suction power

Oil skimmer
Oil skimmer

The oil skimmer removes hydraulic and lubricating oil from the cutting fluid surface to keep the cutting fluid as clean as possible.

Tool cleaning device
Tool cleaning device
  • Brushing and air cleaning of the conical and flat surfaces of the tool interface during the machining operation
  • Combined and patented GROB brushing/blow-off device
Tool coding
Tool coding
  • Allows data to flow between tool and machine control
  • Shorter tooling times
  • Write-read unit for tools with tool coding
  • Errors when inputting the tool data avoided
Laser measurement system for milling tools
Laser measurement system for milling tools

Contactless, optical tool monitoring/measurement of rotating tools, such as milling cutters and drills.

Electromechanical tool breakage detection device
Electromechanical tool breakage detection device
  • Tool breakage detection via a tactile tool breakage detection device
  • Monitoring during machining
Machine status lamp
Machine status lamp
  • A three-color status lamp is used to visually indicate the machine status
  • A distinction is drawn between automatic mode (green), warning (yellow) and malfunction (red)
Touch probe
Touch probe

For aligning and measuring parts or clamping fixtures, as well as for setting zero and reference points for downstream machining operations.

GROB Service
Customer service

Phone:  +1 (419) 358-9015