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A large gantry milling machines is a large CNC machine tool that combines the stability of a gantry milling machine with the versatility of a machining center, and is specifically designed for high-precision and high-efficiency machining tasks. This type of machine tool is typically used to process large parts such as molds, aerospace components, automotive parts, etc., where precise machining is required.
Feature
The machine tool features a gantry frame structure, comprising two parallel columns and a top beam that connects to the columns, creating a robust gantry configuration for enhanced stability and rigidity. The large gantry milling machines boasts high-precision processing capabilities, thanks to the integration of high-precision servo motors and either ball screws or linear guides, which ensure the accuracy and repeatability of each axis's movement. The machine is also equipped with an advanced built-in CNC system that can manage complex processing programs, enabling automatic control and multi-axis coordination. Additionally, it typically includes an automatic tool changing system (ATC), which facilitates the automatic tool changes during the machining process, thereby enhancing production efficiency.
Product Introduction

① Base structure
Compared with the double-guideway design, the rigidity is 50% higher; Compared with the four-guide ways design, it is more symmetrical and evenly distributed, reducing the power loss caused by the resistance of the multi-guideway slider; 3m wide worktable, 2.1m base linear guideway. It is the best ratio span of 0.7.
② Gantry moving nut structure
The X-axis is driven by a moving nut, and three-point support is used in the middle to maintain the rotation accuracy of the ball screw rod. At the same time, the load capacity is large, and the cutting vibration resistance is good. It can improve the dynamic characteristics of the machine tool and increase the accuracy, stability, and service life of the machine tool.
③ Square ram
Bigger dimensions 500*500, the original size is 460*460. It is a more heavy-duty design; The built-in direct connection design reduces the power transmission consumption from the spindle motor to the spindle.
④ Slide features
The large-size and heavy-duty design ensure that the upper part of the ram is firmly hugged by the three elongated sliders, and the lower part is supported by the four standard sliders.
⑤ Nitrogen counterweight
Reduce the load of the motor and the bearing force of the ballscrew, increase the life of the ballscrew and the motor, and the acceleration of the Z axis to ensure processing accuracy.
⑥ Beam structure
The stepped L-shaped design improves rigidity; The concave C-shaped structure has better-bending resistance;
Large section design; Finite element analysis.
⑦ Ballscrew support frame system
⑧ Column structure
The 1.28m ultra-wide design of the column reduces the overall cutting vibration and makes the machine tool stable.
Gantry Machining Center High-Accuracy GMM-5038 Parameters
| Model | GMM-5038 | ||
| Subject | Specifications | Units | |
| Travel | X-Axis | mm | 5000 |
| Y-Axis | mm | 3800 | |
| Z-Axis | mm | 1250(Optopmal 1500) | |
| Spindle Nose to Worktable | mm | 350-1600 | |
| Three-Axis Guideway | X/Y Heavy Load Roller Linear Guideway Z-Axis T-Type Ram Box Way | ||
| Door Width | 3800 | ||
| Type of Ram | Square-Type Ram (500x500) | ||
| Worktable | Worktable Size(L*W) | mm | 4600*3000 |
| Maximum Table Load | t | 30 | |
| T-Slot | mm | 15-28*200 | |
| Spindle | Spindle Type | type | BBT-50 |
| Spindle R.P.M. | rpm | 6000 | |
| Spindle Drive Type | DDS | ||
| Feedrate | Rapid Traverse (X/Y/Z) | m/min | 8/10/10 |
| Cutting Feedrate (X/Y/Z) | m/min | 8 | |
| Tool Changer | ATC | 24 (Option: 40/60) | |
| Motor | Spindle Motor | KW | 22/26 (140-286 Nm) |
| Three-Axis Servo Motor | KW | 6/3/3 (38/36/36 Nm) | |
| Power Required | Power Requirement | kva | 55 |
| Air Pressure Requirement | kg/cm² | 6^8 | |
| Others | External Dimensions (L*W*H) | mm | 11600*7000*6320 |
| Gross Weight | t | 66 | |
Standard Accessories
| Heat Exchange for Electric Cabinet | Dual LED Work Light | CNC System |
| Dual-Screw Type Chip Conveyor | Automatic Lubricating System | Spindle Unit |
| Rigid Tapping | Semi-Enclosed Guard | Drive System |
Options
| 90° Auto Milling Head with AHC | Air Conditioner | Camera-type Tool Measurement System |
| 90° Manual Milling Head | Oil Mist System | Automatic Lubrication System |
| Auto Parts Probe Measuring System | Oil Skimmer | Water Spray Cooling System |
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