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Modular machining center
The G300 machining center is designed specifically for use in flexible series production and offers customers from the automotive sector the ideal solution for high-precision cutting.
As the smallest size among the various G-series stages, the G300 boasts impressive space-saving external dimensions and dynamic motion sequences – for fast, efficient and ultra-modern production.
Technical data
Working travels
in X-/Y'-/Z-axis (mm)
Max. speeds
in X-/Y'-/Z-axis (m/min)
Interference diameter
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 with clamping fixture and part
(kg) (A'-axis/A'-/B-'-axis)
The benefits at a glance
checkboxReduced machine width
checkboxMaximum tool length
checkboxFast tool change
checkboxBroad range of applications
checkboxModern machine design
checkboxExpandable tool pockets in the tool magazine
checkboxIntelligent power unit arrangement
checkboxHighly effective loading concept
Unique machine concept
Axes decoupling

To improve dynamics and rigidity and to achieve a compact configuration according to the modular concept, the motion axes of the G-modules have been divided into tool and part side.

Modular configuration

The standardized basic principle of the G-series permits a modularized manufacturing process with shorter throughput times and minimized part costs. This effectively reduces the number of assemblies while permitting a broad range of combinations.

Optimum flexibility

The G-module ensures a fast and flexible response to part modifications and to type changes. This modular principle also makes for easy reusability.

Extremely economic

The G-modules are designed for both wet and dry machining. In the system overall, they require only a very small footprint and are optimized for short throughput times. Thanks to constant further development, energy-saving measures are already offered as standard.

Completely future-proof

The G-series considers increasingly shorter innovation cycles and fast product changes. Its reduced footprint and commissioning effort makes it a flexible partner for all manufacturing tasks and any process modification.

Pure technology in the smallest space
G300 of GROB
Chip disposal

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

Tilting rotary table

Almost limitless machining potentials thanks to the largest possible swivel range

Horizontal motorized spindle

For meeting the toughest cutting requirements

Disk-type tool magazine

Fast tool change through an intelligent magazine to motorized spindle arrangement

Chip disposal

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

Tilting rotary table

Almost limitless machining potentials thanks to the largest possible swivel range

Horizontal motorized spindle

For meeting the toughest cutting requirements

Disk-type tool magazine

Fast tool change through an intelligent magazine to motorized spindle arrangement

The highly flexible manufacturing line
With over 90 years' experience in the system business, GROB offers customized systems for challenging large series production.
Flexible manufacturing line by GROB

Tilting rotary tables

Various tilting rotary table versions are available for the G300, depending on the requirement. The powerful rotary tables are based on the latest torque motor technology and offer optimized dynamics.

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 G300 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-A63, 146 Nm, 16,000 rpm
  • HSK-A63, 199 Nm, 8,000 rpm
  • HSK-A100, 185,5 Nm, 12,000 rpm
  • HSK-A100, 340 Nm, 6,000 rpm
  • HSK-A100, 340 Nm, 10.000 rpm
  • HSK-A100, 344 Nm, 6.000 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

GROB tool magazine technology is set apart by fast chip-to-chip times, a smaller space requirement and optimized accessibility. Choose the right solution for you.

Single disk-type tool magazine
Single disk-type tool magazine
Double disk-type tool magazine
Double disk-type tool magazine
Tool change during machining
Tool change during machining
Tool changer arm
Tool changer arm

Control systems

Choose between the latest and most powerful CNC control systems from market leaders for the G300:


  • SIEMENS (standard)


  • FANUC (option)

Automation solutions

Draw on the experience we have garnered over several decades and benefit from the automation technology we tailor to meet your needs – from solutions with part storage systems to highly flexible manufacturing lines.

Loading systems
Loading systems

The G-series 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 loading

  • Agile loading gantry
  • Cartesian linear gantry
  • Cartesian linear gantry with telescope


Front loading

  • Automatic sliding changer
  • 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 G300 more flexible, while increasing your own productivity and economy at the same time.

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
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
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
Continuous cooler
Continuous cooler
  • An external continuous cooler for cooling the cutting fluid
  • Available for all high-pressure cutting fluid pumps
Hand-held controllers
Hand-held controllers
  • With keys for selecting the axis directions, feed, rapid travel, emergency stop and for acknowledging axis movements
Electromechanical tool breakage detection device
Electromechanical tool breakage detection device
  • Tool breakage detection via a tactile tool breakage detection device
  • Monitoring during machining
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
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)
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
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
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
GROB Service
Customer service

Phone:  +1 (419) 358-9015