GMB-G Series
5-Axis Ultra-High-Precision Gantry Machining Centers for large-format precision machining.
The GMB-G Series combines CFRP dual-crossbeam gantry technology, high-precision 5-axis machining and advanced thermal stability concepts for ultra-precision machining in large working ranges. It is designed for aerospace structures, automotive body panel molds, semiconductor equipment components and other large high-accuracy parts.
Siemens and Heidenhain CNC control options.
Siemens CNC
Heidenhain CNC
Configured by Application
Ultra-precision gantry machining in large working ranges.
The GMB-G Series uses a CFRP dual-crossbeam structure, high-precision AC swivel head, high-speed spindle technology and intelligent calibration systems to support micron-level precision across large-format machining applications.
Dual Crossbeam Design
The lightweight box-in-box CFRP structure supports high rigidity, reduced moving mass and improved thermal behavior for large-format precision machining.
50%
Reduced moving component weight
300%
Increased stiffness
1000%
Improved thermal stability
Ultra-High Precision
High volumetric positioning accuracy, precise rotary-axis performance and 5-axis RTCP accuracy support demanding aerospace, mold and semiconductor applications.
≤ 4 μm
Linear-axis repeatability
≤ 20 μm
5-axis RTCP accuracy
≤ 40 μm
30 m³ volumetric accuracy
Thermal Monitoring & Compensation
Thermal displacement monitoring, compensation systems and comprehensive cooling concepts help maintain stable accuracy during long machining processes.
±5°C range
Controlled workshop accuracy
≤ 10 μm
With compensation
Cooled drives
Thermal stability concept
High-Efficiency Motion
High-speed and high-acceleration motion enables efficient machining while preserving high dynamic contouring accuracy in large working ranges.
80 m/min
X/Y rapid traverse
50 m/min
Z rapid traverse
7 m/s²
Axis acceleration
Ultra-High Precision
The GMB-G Series is designed for large-format precision machining with high linear-axis repeatability, RTCP accuracy and volumetric positioning accuracy.
Stable Quality
CFRP structure, thermal stability design and thermal displacement compensation support consistent machining accuracy over long production cycles.
High-Efficiency Machining
High-speed axis motion, lightweight moving components and high dynamic contouring capability help increase productivity in large working ranges.
Lower Costs
Lightweight CFRP components reduce moving mass and support lower energy consumption and construction costs compared with traditional gantry concepts.
Technical data of the GMB-G Series.
The table below summarizes the key technical data of the GMB-G Series, including travel range, spindle options, swivel head data, positioning accuracy, tool magazine configuration and precision-related machine options.
| Parameter | Specification |
|---|---|
| Worktable max. load | 5000 kg/m² |
| X-axis travel | 2500/4000/5000 ... 30.000 mm |
| Y-axis travel | 3000 / 4000 mm |
| Z-axis travel | 1250 mm (optional 1500 mm) |
| A-axis travel | ±110° |
| C-axis travel | ±360° |
| Max. rapid traverse of X/Y/Z-axis | 80 / 80 / 50 m/min |
| Max. speed of A/C-axis | 50 / 50 rpm |
| Positioning accuracy of X/Y/Z-axis | ≤ 0.008 / overall length |
| Positioning accuracy of A/C-axis | 5″ |
| Repeatability of X/Y/Z-axis | 0.004 / overall length |
| Repeatability of A/C-axis | 3″ |
| Rated torque of A/C-axis | 1120 / 1070 Nm; 780 / 813 Nm |
| Peak torque of A/C-axis | 2060 / 2090 Nm; 1470 / 1560 Nm |
| Clamping torque of A/C-axis | 3880 / 4000 Nm |
| Spindle taper | HSK-A100; HSK-A63 |
| Spindle power (S1/S6) | 70 / 85.5 kW; 54 / 54 kW; 54 / 64.8 kW; 50 / 65 kW; 42 / 50 kW |
| Spindle torque (S1/S6) | 167.1 / 229.4 Nm; 200 / 235 Nm; 200 / 240 Nm; 95.5 / 124 Nm; 66.9 / 83.8 Nm |
| Spindle max. speed | 15,000 rpm; 12,500 rpm; 15,000 rpm; 15,000 rpm; 24,000 rpm |
| Tool holder | HSK-A100; HSK-A63 |
| Tool magazine capacity | 40 pockets (optional 90); 40 pockets |
| Max. tool diameter with/without adjacent tool | Ø125 / Ø250 mm; Ø75 / Ø150 mm |
| Max. tool weight | 25 kg; 8 kg |
| Max. tool length | 500 mm; 280 mm |
Full GMB-G Series brochure.
Download the official GMB-G Series brochure with detailed information about ultra-high-precision gantry machining, CFRP dual-crossbeam design, precision calibration, application areas and technical configuration.
Impressions from the GMB-G Series in ultra-precision gantry machining contexts.
This gallery presents a mixed visual selection from the GMB-G Series, including machine views, gantry structure details, machining environments and application-related impressions. The images are not separated by configuration and provide a broader impression of the series as a whole.
Related machines in this family.
The Phantom Family includes gantry machining concepts for different large-part manufacturing priorities. While the GMB-G Series focuses on ultra-high-precision machining, the GMB-B Series is designed for ultra-high-speed production of large components.
5-Axis Ultra-High-Speed Gantry Machining Center
Ultra-high-speed gantry machining solution for efficient processing of large aluminum components, giga-cast parts and aerospace structures.
Need the right GMB-G configuration?
Talk to TOPNC about working range, component accuracy, surface quality, material requirements and production workflow. Based on your application, we can help identify the right GMB-G concept for your precision machining environment.