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GMC3225B 4225B 5225B Gantry Machining Center
  • GMC3225B 4225B 5225B Gantry Machining Center

GMC3225B 4225B 5225B Gantry Machining Center

The Bridge/Gantry Type Machining Center could be equipped with automatic head changer and vertical / horizontal ATC system to provide maximum efficiency as of a 5-face machining center.
  • GMC3225B 4225B 5225B Gantry Machining CenterDownload
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Technical parameters of GMC3225B 4225B 5225B Gantry Type Machining Center
Model Unit GMC3225B GMC4225B GMC5225B
Standard controller   FANUC 0i MF
 
 
Travel
X axis travel(work-table) mm 3200 4200 5100
Y axis travel(saddle) mm 3000
Z axis travel(spindle head) mm 1000
Distance from spindle nose to table mm 235-1235
Distance between columns mm 2550
 
Work table
Table size (length x width) mm 3350x2200 4350x2200 5350x2200
Max. table load kg 15000 18000 21000
T slot size (width x distance x quantity) mm 28x250x13 28x250x17 28x250x21
 
 
Spindle
Spindle taper   BBT50
Max. spindle speed rpm 10000(direct driven)
Spindle  motor       power  ( continual
working/30mins)
kW 22/26
Spindle torque Nm 140/165
X/Y/Z Rapid traverse (X axis) mm/min 15000 12000 12000
Rapid traverse (Y axis) mm/min 18000
Rapid traverse (Z axis) mm/min 15000
Cutting feed rate (X/Y/Z) mm/min 1-8000
 
 
ATC
(option)
ATC type   Chain type
Tool capacity pcs 32
Max. tool diameter mm Φ110 /Φ225
Max. tool length mm 350
Max. tool weight kg 20
 
Accuracy
Full travel positioning accuracy (VDI/DGQ344 1) mm P0.025 P0.030 P0.040
Re-positioning accuracy (VDI/DGQ344 1) mm Ps0.020 Ps0.025 Ps0.030
Air pressure MPa 0.6-0.8
Power requirement kVA 60
Machine size (length/width/height) mm 10125x6840x4715 12035x6840x4715 14035x6840x4715
Machine weight kg 40000 45000 50000

Equipments
1.FANUC 0i MF absolute type;
2. Fine quality machining package;
a) AICC II;
b) Jerk control;
c) Smooth tolerance control;
d) Machining quality level adjustment function;
3. 3 colors warning light;;
4. Working area light;

5. Portable MPG;
6. Ethernet DNC machining;

7. Automatically power off;
8. Transformer;

9. Door interlock;
10. Spindle air sealing;

11. Direct driven spindle BBT50-10000rpm;
12. Spindle chiller;

13. Lubrication system;
14.Machining air blowing device;

15. Pneumatic system;
16. Rigid tapping;

17. Water gun/air gun with flushing function;
18. Full enclosed splash guard;

19. Coolant system;
20. Adjustable level bolts and foundation blocks;

21. Heat exchanger in electrical cabinet;
22. Chain chip conveyor;

23. Tool box;
24. Operation manual;

 
Optionals
1. HEIDENHAIN TNC;
2. Linear scale (Heidenhain);

3. Voltage stabilizer;
4. Tool measuring system;

5. Workpiece measuring system;
6. 3D coordinate system rotation;

7. 3 axis thermal compensation;
8. Oil-feed tool shank port;

9. Column rise 200mm/300mm;
10. Attachment milling head;

11. Rotation storage for attached head;
12. 4th axis/5th axis;

13. Arm type ATC (32/40/60pcs);
14. Oil and water separate box;

15. A/C for electric cabinet;

FORTUNE PACIFIC is proud to offer a variety of gantry milling machines. Engineered and constructed to the highest caliber, these Bridge/gantry type machining centers allow for high volume accuracy, extreme weight allowance, and the ability to approach the part from multiple angles.

Bridge/Gantry Type Machining Center
Introducing with mature manufacturing abilities and advanced technology skills, the GMC series gantry type machining center combines gantry type structure with adjustable crossbeam mechanism, strong horse power and high rigidity features, to provide you with a complete machining solution for extra large work pieces. Bridge/Gantry Type Machining Center has been widely used in aerospace, shipbuilding, energy and machine tools industries.

The Bridge/Gantry Type Machining Center could be equipped with automatic head changer and vertical / horizontal ATC system to provide maximum efficiency as of a 5-face machining center.

Complete product line with full range specifications, the Bridge/Gantry Type Machining Center could be equipped with self-developed milling heads, automatic head storage magazine and vertical / horizontal ATC system to provide high added cutting capabilities for large work pieces.
Equipments
1.FANUC 0i MF absolute type;
2. Fine quality machining package;
a) AICC II;
b) Jerk control;
c) Smooth tolerance control;
d) Machining quality level adjustment function;
3. 3 colors warning light;;
4. Working area light;

5. Portable MPG;
6. Ethernet DNC machining;

7. Automatically power off;
8. Transformer;

9. Door interlock;
10. Spindle air sealing;

11. Direct driven spindle BBT50-10000rpm;
12. Spindle chiller;

13. Lubrication system;
14.Machining air blowing device;

15. Pneumatic system;
16. Rigid tapping;

17. Water gun/air gun with flushing function;
18. Full enclosed splash guard;

19. Coolant system;
20. Adjustable level bolts and foundation blocks;

21. Heat exchanger in electrical cabinet;
22. Chain chip conveyor;

23. Tool box;
24. Operation manual;
Technical parameters of GMC3225B 4225B 5225B Gantry Type Machining Center
Model Unit GMC3225B GMC4225B GMC5225B
Standard controller   FANUC 0i MF
 
 
Travel
X axis travel(work-table) mm 3200 4200 5100
Y axis travel(saddle) mm 3000
Z axis travel(spindle head) mm 1000
Distance from spindle nose to table mm 235-1235
Distance between columns mm 2550
 
Work table
Table size (length x width) mm 3350x2200 4350x2200 5350x2200
Max. table load kg 15000 18000 21000
T slot size (width x distance x quantity) mm 28x250x13 28x250x17 28x250x21
 
 
Spindle
Spindle taper   BBT50
Max. spindle speed rpm 10000(direct driven)
Spindle  motor       power  ( continual
working/30mins)
kW 22/26
Spindle torque Nm 140/165
X/Y/Z Rapid traverse (X axis) mm/min 15000 12000 12000
Rapid traverse (Y axis) mm/min 18000
Rapid traverse (Z axis) mm/min 15000
Cutting feed rate (X/Y/Z) mm/min 1-8000
 
 
ATC
(option)
ATC type   Chain type
Tool capacity pcs 32
Max. tool diameter mm Φ110 /Φ225
Max. tool length mm 350
Max. tool weight kg 20
 
Accuracy
Full travel positioning accuracy (VDI/DGQ344 1) mm P0.025 P0.030 P0.040
Re-positioning accuracy (VDI/DGQ344 1) mm Ps0.020 Ps0.025 Ps0.030
Air pressure MPa 0.6-0.8
Power requirement kVA 60
Machine size (length/width/height) mm 10125x6840x4715 12035x6840x4715 14035x6840x4715
Machine weight kg 40000 45000 50000
Optionals
1. HEIDENHAIN TNC;
2. Linear scale (Heidenhain);

3. Voltage stabilizer;
4. Tool measuring system;

5. Workpiece measuring system;
6. 3D coordinate system rotation;

7. 3 axis thermal compensation;
8. Oil-feed tool shank port;

9. Column rise 200mm/300mm;
10. Attachment milling head;

11. Rotation storage for attached head;
12. 4th axis/5th axis;

13. Arm type ATC (32/40/60pcs);
14. Oil and water separate box;

15. A/C for electric cabinet;

Knee Type Milling Machine: Precision Versatility for Industrial Manufacturing

What is a Knee Type Milling Machine?

A knee type milling machine is a fundamental machine tool distinguished by its vertically adjustable worktable mounted on a "knee" casting. This knee moves precisely up and down a fixed column via a screw mechanism, enabling accurate Z-axis positioning crucial for diverse milling operations.

Working Principle

The core principle involves a rotating milling cutter removing material from a workpiece secured to the table. The adjustable knee mechanism allows controlled vertical movement (Z-axis), while the table provides longitudinal (X-axis) and transverse (Y-axis) travel. This 3-axis control facilitates complex machining of flat, angular, and contoured surfaces.

Key Applications

  • Tool & Die Making: Precision molds, jigs, fixtures
  • Prototyping: Rapid part development
  • Maintenance Shops: Equipment repair & part fabrication
  • General Machining: Slotting, drilling, facing, keyway cutting
  • Aerospace & Automotive: Component manufacturing

Distinctive Features & Advantages

  • Vertical Adjustability: Knee movement enables quick workpiece height changes
  • Rigid Construction: Robust cast iron frame ensures stability
  • Manual & CNC Options: Traditional control or computer numerical precision
  • Turret Design (Common): Swiveling milling head for multi-angle machining
  • Wide Workpiece Compatibility: Handles various sizes and shapes

Primary Classifications

  • Vertical Knee Mill: Spindle axis perpendicular to table (most common)
  • Horizontal Knee Mill: Spindle axis parallel to table (for heavy stock removal)
  • Universal Knee Mill: Table swivels for complex angular cuts
  • Turret Mill: Head rotates on turret for flexible positioning

Main Components

  • Base & Column: Primary support structure
  • Knee: Vertically moving saddle supporting the table
  • Saddle & Table: Hold and position the workpiece (X/Y axes)
  • Milling Head: Houses spindle, motor, and quill (Z-axis)
  • Arbor/Spindle: Rotating shaft holding cutting tools
  • Controls: Manual handwheels or CNC interface

Evolution & Industry Significance

Since their development in the late 19th century, knee-and-column mills revolutionized machining. The iconic Bridgeport design (1938) popularized the turret style. While CNC machining centers dominate high-volume production, knee mills remain indispensable for flexibility, ease of use, and cost-effectiveness in job shops, schools, and repair facilities worldwide.

Fortune Pacific: Your Knee Mill Solution

At Fortune Pacific, we engineer durable, high-precision knee type milling machines for demanding applications. Explore our range of vertical mills, horizontal mills, and CNC-ready models designed to enhance your workshop's capabilities. Discover the ideal machine for your metalworking, prototyping, or toolmaking needs.

Keywords: Knee Type Milling Machine, Vertical Milling Machine, Horizontal Mill, Turret Mill, Knee-and-Column Mill, Milling Machine for Sale, Industrial Milling, Metalworking Equipment, Workshop Machinery, CNC Mill, Toolroom Mill, Precision Machining, Fortune Pacific, Machine Tool Manufacturer.