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5 Axis Gantry Type Machining Center

This GBX-4240U elevated bridge 5 axis gantry type machining center features a fixed worktable and elevated bridge structure. The X-axis is driven by saddles moving the box-in-box crossbeam longitudinally along the left and right machine beds. Worktable size is 3000×4000mm with a load capacity of 8000kg/m². Equipped with an Mepro AC swivel head with torque motor direct drive, A/C axis positioning accuracy of 8 arc-seconds. Spindle speed up to 10000rpm, HSK-A100 taper, rated torque 200N.m (240N.m at S6-40%). The machine runs on Siemens SIEMENS ONE CNC system with 5-axis simultaneous capability. This machine is positioned as a high-precision 5-axis machining platform for medium-sized complex surface components, suitable for aerospace structural parts, precision molds, and energy equipment impellers.

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Product Introduction

Product Details

The 5 axis gantry type machining cente adopts an elevated bridge structure with a fixed worktable. Longitudinal saddles on the left and right beds support a box-in-box crossbeam, which moves along the X-axis together with the ram. The entire structure forms a closed rigid frame. Main components including the bed, worktable, left/right saddles, box-in-box crossbeam, transverse carriage, and milling ram are all cast from high-strength cast iron using resin-bonded sand molding, providing good vibration damping and thermal stability. As a 5-axis gantry type machining center, the X and Y axes use Alpha gear rack drives, and the Z axis uses a ballscrew. Rapid traverse rates are 30/30/20 m/min. The AC swivel head uses torque motor direct drive with no gear transmission - A-axis swivel range ±105°, C-axis continuous ±360° rotation. The machine features fully enclosed sheet metal guarding (without roof), X/Y axis way covers with accordion-type bellows, and software limit protection on all axes.

Machine Specifications

Item	Unit	Parameters
Worktable
Table size	mm	3000×4000
Max. table load	kg/m²	8000
T-slot width × pitch	mm	28×250
Machining Range
Distance between columns (clearance)	mm	4200
Spindle nose to table surface	mm	200-1450
X/Y/Z axis travel	mm	4200/3000/1250
Speed
X/Y/Z axis rapid traverse	m/min	30/30/20
Cutting feed rate	m/min	20
AC Swivel Head (Torque Motor Direct Drive)
Brand	-	Mepro
A/C axis max. swivel speed	rpm	60/60
A/C axis max. torque	N.m	1060/1350
A/C axis rated torque (S1-100%)	N.m	700/715
A/C axis braking torque	N.m	4000/4000
A/C axis positioning accuracy	arc.sec	8"/8"
A/C axis swivel range	deg	±105°/±360°
Spindle
Spindle taper	-	HSK-A100
Spindle speed range	rpm	Rated 2580 / Max. 10000
Spindle power (S1-100%)	kW	54
Spindle torque (S1-100% / S6-40%)	N.m	200 / 240
Drive & Guideway
X/Y axis drive type	-	Alpha gear rack
Z axis ballscrew spec.	-	6340
X/Y/Z axis guideway type	-	4-55 heavy-duty roller guideways
Control System
CNC system	-	Siemens SIEMENS ONE
Machine Accuracy (in accordance with GB/T33150-2016)
Positioning accuracy (X/Y/Z)	mm	0.022/0.023/0.012
Repeatability (X/Y/Z)	mm	0.018/0.018/0.01
Others
Power supply requirement	kVA	150
Air pressure requirement	Kg/cm²	6-8
Floor space approx. (L×W×H)	m	8×7.8×6

Product Details

Box-in-Box Crossbeam

The crossbeam adopts a box-in-box design - an outer large box structure with the ram nested inside, reinforced with internal ribs. This provides better rigidity and torsion resistance than solid rectangular beams of equivalent weight. Left and right saddles support the crossbeam from both ends, with synchronized dual drives during X-axis movement for balanced loading.

Torque Motor Direct Drive AC Swivel Head

The AC swivel head uses Mepro torque motors for direct drive - one motor each for A and C axes, with no gears, worm gears, or belts. Benefits include zero backlash, no gear wear for long-term accuracy retention, and vibration-free/noise-free operation for better surface finish. Braking torque of 4000N.m prevents head droop during power outages or emergency stops.

4 Guideways on All Axes

X, Y, and Z axes each feature 4 heavy-duty 55mm roller guideways. The X-axis has two on each side of the bed, the Y-axis has four evenly spaced on the crossbeam, and the Z-axis has one on each face of the ram. Four guideways provide wider load distribution, reduced individual slider loading, and smoother motion.

Spindle HSK-A100 + 10000rpm

HSK-A100 tool holder features dual-face contact for stable clamping force at high speeds, suitable for 10000rpm operation. Rated spindle power is 54kW with torque of 200/240N.m. The 10000rpm top speed enables efficient machining of aluminum and composite materials, while lower speeds handle steel roughing.

Full Guarding + Bellows Covers

Full sheet metal guarding (without roof) contains chips and coolant within the work area. X/Y axis guideways are protected by accordion-type bellows, flexible and suitable for long-stroke Y-axis reciprocation. Access ladders and maintenance platforms with handrails are provided on the gantry frame for easy daily upkeep.

Cooling & Chip Removal System

External coolant type. Screw-type chip conveyors on both sides of the bed transfer chips to the front end, where a scraper conveyor discharges them into a chip cart for easy removal.

Electrical Control System

The electrical cabinet is equipped with an air-conditioning type temperature regulator to maintain constant internal temperature, providing moisture protection, vibration resistance, and EMI shielding.

Lubrication System

Application	Oil Type	Specification	Refill Interval
Ballscrews / Guideways / Slideways	Guideway oil	ISO VG68	Refill based on low oil level alarm signal

Recommended Brands (Optional):

ISO VG68: Shell TONNA T68 or Great Wall L-G68 guideway oil

Centralized automatic lubrication system with timed and metered oil supply, equipped with low pressure and low oil level safety alarms. AC swivel head bearing and torque motor lubrication must follow Mepro's specified grease type and maintenance schedule.

Main Component Brands

No.	Component	Brand
1	CNC system	Siemens (Germany)
2	Servo motors & drives	Siemens (Germany)
3	Spindle unit	Mepro (China)
4	Linear guideways	THK (Japan)
5	Ballscrews	THK (Japan) / YIFU (Germany) / DTK (Taiwan)
6	Gear rack	Alpha (Germany)
7	Feed axis bearings	NSK / NACHI (Japan)
8	Electrical components	ABB (Switzerland)
9	Pneumatic components	AirTAC (Taiwan)
10	Nitrogen counterbalance cylinder	Wuxi Deyue (China)
11	Lubrication system	Baoteng / Koyo (China / China-Japan)
12	Spindle oil cooler	Tongfei (China)
13	Couplings	NEK (Japan)
14	Feed axis reducers	Shinpo (Japan)
15	Chip conveyor	Wuzuobiao (China)

Applications

Aerospace Aluminum Structural Parts:

Aircraft ribs, frames, bulkheads, and panels in the 3-4 meter range fit on the 3000×4000mm table. As a 5-axis gantry type machining center, one setup handles both internal and external profile machining. A-axis ±105° swivel handles sidewalls and chamfers, C-axis continuous rotation machines circular contours. The 10000rpm spindle with HSK-A100 is ideal for high-speed aluminum milling.

Composite Components:

Carbon fiber aerospace parts, wind turbine blade molds, and other non-metallic materials that require high spindle speed (10000rpm sufficient) with low torque. Rapid traverse rates of 30/30/20 m/min deliver high productivity. This 5-axis gantry type machining center configuration is particularly well-suited for light-cut, high-feed composite applications.

Large Precision Molds:

Automotive panel stamping dies and bumper injection molds with complex surfaces in the 2-4 meter range. 5-axis simultaneous operation allows side-edge cutting instead of ball-nose point cutting, improving surface quality. 1250mm Z-axis travel plus A-axis swivel handles deep cavities and steep sidewalls.

Energy Equipment Impellers & Diffusers:

Compressor impellers, pump diffusers, and other twisted-blade components that require 5-axis machining. Torque motor direct drive provides fast response, 8 arc-second positioning accuracy, and good contour-following performance.

After-Sales Service

Foundation & Installation Preparation: Before delivery, customer must complete foundation work and secondary grouting per drawings (concrete curing at least 28 days). Guideway oil (ISO VG68) to be provided by customer.

Unloading & Positioning: Customer responsible for unloading, lifting, and positioning. Manufacturer provides dimensions, weight, center of gravity, and lifting drawings prior to shipment.

Installation & Commissioning: After positioning, customer notifies manufacturer to dispatch commissioning engineers. Before their arrival, customer must complete power (3-phase 380V/50Hz, 150kVA) and air (6-8 Kg/cm²) connections, but must not power on or supply air in advance. Customer signs off after commissioning.

Warranty: 12 months from final acceptance date. Free repair and parts replacement for quality-related defects during warranty period.

Service Response: 2-hour phone response after service request. On-site service within 48 hours (domestic) if phone support cannot resolve. Out-of-warranty parts supplied at cost.

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