The Skymach BR4022 CNC Gantry Machining Center (GMC4022 series) is a heavy-duty, high-precision double-column bridge machining center designed for high-efficiency milling of extra-large automotive stamping dies, aerospace structural beams, energy equipment casings, railway components, and precision heavy machinery bases.
Built on an integrally cast, stress-relieved HT300 iron foundation with a total machine mass of 43.0 tons (43,000 kg), the BR4022 combines a massive 2000 x 4000 mm worktable, 12.0-ton load capacity, and 4000 x 2200 x 1000 mm travels with a high-torque 6,000 RPM BT50 spindle (18.5 kW) and a 30-tool arm-type disc ATC, delivering unmatched rigidity, vibration damping, and dynamic contour accuracy.
Superior Machining Performance & Workpiece Capacity
- Massive 2000 x 4000 mm Worktable: Accommodates heavy plate structures, large automotive pressing dies, and multi-cavity injection molds with up to 12.0 tons payload.
- Expansive XYZ Travels: 4000 mm X-axis longitudinal travel, 2200 mm Y-axis cross travel (with secondary stroke capability up to 2700 mm), and 1000 mm Z-axis vertical stroke provide generous envelopes for complex 5-face milling setups.
- Heavy BT50 Geared/Direct Spindle: 18.5 kW motor delivers superior cutting torque at low speeds for rough milling and high rotational precision up to 6,000 RPM for fine finishing.
- 30-Tool Arm-Type ATC: Rapid tool changes minimize non-productive idle time during multi-operation machining sequences.
Structural Rigidity & Precision Engineering
- Monolithic Casting Frame: Symmetrical portal bridge structure distributes multi-axis cutting reactions evenly, maintaining stable geometry under extreme chip loads.
- High-Precision Linear Motion: High-grade roller guideways and pre-tensioned ball screws ensure positioning accuracy of X/Y ±0.0075 mm, Z ±0.015 mm and repeatability of ±0.005 mm.
- Automated Chip Management: Twin bed screw augers continuously channel heavy metal chips into the external link-chain conveyor, ensuring clean, continuous operation.
Technical Parameters
| Model | BR4022 |
|---|---|
| Table Size (W x L) | 2000 x 4000 mm |
| X Axis Travel | 4000 mm |
| Y Axis Travel | 2200 mm (Secondary stroke 2700 mm) |
| Z Axis Travel | 1000 mm |
| Gantry Width / Passing Height | 2300 mm |
| Max. Worktable Load | 12.0 t (12,000 kg) |
| Spindle Nose to Table Surface | 280 - 1280 mm |
| T-Slot Specification | 9-28 x 200 mm |
| Spindle Taper | BT50 / 200 |
| Spindle Speed | 6000 rpm |
| Rapid Traverse Speed | 12 m/min |
| Cutting Feed Speed | 8 m/min |
| Main Motor Power | 18.5 kW |
| Tool Magazine Capacity | 30 Tools (Arm Disc ATC) |
| Positioning Accuracy | X/Y ±0.0075 mm, Z ±0.015 mm |
| Repeat Positioning Accuracy | ±0.005 mm |
| Overall Dimensions (L x W x H) | 12750 x 5940 x 5100 mm |
| Machine Weight | 43.0 t (43,000 kg) |
Frequently Asked Questions
What is the warranty period for your machines?
We offer a standard 12-month warranty on all our CNC machines, covering the spindle assembly, ball screws, linear guides, CNC controller, and servo drive motors. Extended warranties and customized service plans are available upon request.
Do you provide overseas installation and training?
Yes. Our engineers are available for overseas dispatch to assist with machine installation, commissioning, and comprehensive operator training at your facility. Every machine also ships with English manuals, circuit diagrams, and video setup guides.
What is the typical lead time for an order?
Standard catalog machines ship within 30 days. Custom configurations — such as oversized spindle bores, extended bed lengths, or integrated 4th-axis rotary tables — typically ship within 60 days.
How do you handle spare parts requests?
We maintain a comprehensive inventory of standard spare parts. Genuine replacement components are dispatched via international express (DHL/FedEx) within 48 hours, ensuring minimal downtime for your production line.
