GSA2518 BridgeType Machining Center

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Josen GSA2518 Bridge-Type Gantry Machining Center for Large-Scale Precision Machining

The Josen GSA2518 Bridge-Type Machining Center is designed for precision machining of large components, mechanical parts, and molds. Its rigid structural configuration, heavy-duty guideways, and high-torque spindle system support demanding machining operations where dimensional accuracy, structural stability, and dependable performance are essential.

With a working envelope of 2500 × 1800 × 800 mm, the GSA2518 accommodates a wide range of workpiece sizes. It is suitable for manufacturers in aerospace, automotive, engineering machinery, new energy, semiconductor equipment, and medical equipment industries that require a versatile gantry machining solution.

Key Features of the GSA2518 Bridge-Type Machining Center

1. Rigid Gantry Structure for Stable Machining

The GSA2518 features an integrated column-and-beam structure that undergoes full annealing to improve structural stability and provide a solid foundation for precision machining. The integrated base and coolant tank design also simplifies the machine's waterproofing arrangement.

Two X-axis guideways provide support for the worktable and workpiece, helping distribute machining loads and maintain stable movement under heavy-duty operating conditions. With a maximum worktable load of 8,000 kg, the machine is designed to accommodate substantial workpieces used in mold production and industrial component manufacturing.

2. High-Torque Spindle for Demanding Cutting Operations

The spindle assembly incorporates a symmetrical Z-axis headstock design and an internal shower-type temperature control system. These features help manage thermal effects and support spindle stability during extended machining operations.

A dual hydraulic-cylinder counterweight arrangement helps balance the Z-axis movement, while the hard-rail, four-sided casting structure is designed to provide rigidity and long-term accuracy stability.

The spindle motor is rated at 15 kW continuous power and 18.5 kW for 30-minute operation. Combined with the two-speed transmission configuration described in the product information, the spindle system delivers a specified maximum cutting torque of 740 N·m at 183 rpm. This configuration is intended to support both demanding cutting tasks and precision machining requirements.

The spindle speed range is 10–6,000 rpm, and the standard spindle taper specification is BT50, with DIN 69871 A also listed as an available specification.

3. Heavy-Duty Guideways for Efficient Axis Movement

The X and Y axes use heavy-load roller linear guideways to support smooth, precise movement under demanding working conditions. Compared with conventional sliding guide arrangements, the specified low-friction guideway design helps reduce frictional heat and energy losses while supporting positioning accuracy.

The guideways are preloaded to limit clearance and reduce wear during operation. This construction is intended to support long-term operating stability and reduce routine adjustment requirements, helping manufacturers manage maintenance work and machine downtime.

Rapid traverse speeds reach 15 m/min on the X and Y axes and 12 m/min on the Z axis. The cutting feed rate ranges from 1 to 6,000 mm/min, allowing the machine to accommodate different machining strategies.

4. Spindle Protection and Integrated Lubrication Design

The floating-type spindle clamping and unclamping mechanism is designed to minimize the transfer of unnecessary force to the spindle during tool changes. This arrangement helps protect spindle accuracy and bearing service life.

The machine also incorporates separate collection arrangements for lubricating oil and cutting fluid. These systems help maintain lubricant management and coolant cleanliness during machining.

An enclosed electrical cabinet with a circulating heat-exchange system supports temperature management of electrical components. The separation of power and signal wiring further contributes to a well-organized electrical layout.

5. Flexible Tooling and Machining Configurations

The GSA2518 can be configured with different automatic tool-changing systems according to production requirements. A 24-tool arm-type tool changer is listed among the optional accessories, while a 32-tool chain-type magazine is also available as an option.

The tool system accommodates tool lengths up to 400 mm and individual tool weights up to 15 kg. The specified maximum tool diameters are 110 mm and 200 mm for different tool arrangements; the applicable adjacent-tool and non-adjacent-tool limits should be confirmed for the selected configuration.

Additional options include manual 90-degree angle heads, manual universal heads, extended heads, linear-axis glass scales, and coolant-through-spindle equipment. These configurations allow manufacturers to tailor the machine to their workpiece geometry, tooling requirements, and machining processes.

GSA2518 Technical Specifications

Positioning accuracy and repeatability are specified using the VDI 3441 statistical method. Actual machining results depend on workpiece material, tooling, cutting conditions, machine configuration, and operating environment.

Standard Equipment

The standard configuration includes the following equipment and functions, subject to confirmation of the final machine quotation:

• Two-speed spindle head configuration

• Spindle oil cooling system

• Spindle belt-drive device

• Centralized guideway lubrication system

• 550-liter coolant tank and coolant system

• Lubrication oil recovery collectors for the three axes

• Two-screw chip conveyor and chip collector

• Rigid tapping function

• Foot switch for spindle tool release

• Manual pulse generator (MPG) handwheel

• Work light and finish/alarm signal lamp

• Foundation and leveling kits

• 380 V to 220 V power transformer

• Electrical cabinet heat-exchange system

• Machining air gun and cleaning water gun

• Fully enclosed splash protection in gray and black

• Vertical-arm operator panel

• 10.4-inch color LCD screen

• Operation and maintenance manual

Controller functions are provided according to the applicable controller configuration and its standard-function appendix.

Optional Accessories and Configurations

To accommodate different machining tasks and production layouts, the GSA2518 offers a range of optional accessories:

Optional equipment should be selected according to the intended application, required machining processes, and destination-market requirements.

Applications of the Josen GSA2518

The combination of a large working envelope, heavy worktable capacity, and a high-torque spindle makes the GSA2518 suitable for a variety of industrial machining applications.

• Mold and Die Manufacturing: Machining large mold bases, die components, and other substantial tooling parts.

• Automotive Manufacturing: Processing large structural components, fixtures, and production tooling.

• Aerospace Components: Machining suitable large parts and tooling used in aerospace manufacturing.

• Engineering Machinery: Processing heavy mechanical components and equipment parts.

• New Energy Equipment: Machining structural components and tooling for selected new energy manufacturing applications.

• Semiconductor Equipment: Producing large precision components for equipment structures and supporting assemblies.

• Medical Equipment Manufacturing: Machining compatible structural parts and tooling for medical equipment.

The suitability of the machine for a particular component depends on its dimensions, material, geometric complexity, tolerance requirements, and planned machining process.

Why Consider the Josen GSA2518 for Your Production Line?

Selecting a gantry machining center requires consideration of more than axis travel alone. Workpiece loading, spindle torque, positioning performance, tooling flexibility, maintenance requirements, and available factory space all influence equipment selection.

The GSA2518 brings these considerations together through a rigid bridge-type structure, heavy-load guideways, a specified 8,000 kg table capacity, and a configurable tool-changing system. Its 2,500 mm X-axis travel, 1,800 mm Y-axis travel, and 800 mm Z-axis travel provide a working range suited to many large-part and mold-machining tasks.

For manufacturers evaluating equipment for a new production line or an upgrade to existing machining capacity, the machine's standard and optional configurations provide a basis for matching equipment capabilities to specific production needs.

Request Information About the GSA2518

If you are evaluating a bridge-type machining center for large workpieces, mold production, or precision industrial components, contact Josen to discuss your application requirements.

When requesting a quotation, provide your workpiece dimensions, material, target machining accuracy, tooling requirements, production volume, and preferred accessories. This information can help determine whether the GSA2518's working range and available configuration are suitable for your manufacturing process.