MG Series Gantry Mill | JTEKT Machinery North America

MG Series Gantry Mill

The MG Series is a universal moving gantry machining center engineered for ultra-heavy applications where precision and power are equally critical. Designed for industries demanding large-scale machining with tight tolerances, the MG Series combines rigid construction, advanced motion systems, and operator-focused features to deliver unmatched performance in its class.

Equipped with heavy-duty roller guides, the MG Series ensures smooth, high-speed movement and superior load capacity, even under the most demanding cutting conditions. Twin linear scales provide exceptional positioning accuracy and repeatability, allowing the machine to maintain tight tolerances over extended production runs. For enhanced versatility, the MG Series offers optional multi-head configurations, enabling 5-face machining to tackle complex geometries in a single setup.

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MG Structure

Rigid Structural Design

The machine is built on ultra-heavy precision roller linear guideways across all axes, ensuring smooth motion, stability, and long service life. For X-axis travels exceeding 6 meters, a rack and pinion driving system is employed to maintain high performance and accuracy. Its column design is carefully simulated to minimize bending moments from cutting forces, guaranteeing consistent precision even during the heaviest of cuts. A widened foundation design further enhances structural rigidity and provides a stable base, ensuring excellent results in both heavy-duty and high-accuracy machining.

With its modular bed design providing a load capacity of up to 2,500 kg/m², and optional automatic multi-head storage systems, the MG Series is built for maximum versatility and efficiency. Additional features such as twin servo motors with dual linear scales on the X-axis deliver synchronized precision, while a twin screw chip auger system along the X-axis ensures effective chip removal throughout the machine’s full travel.


MG Spindle Glow

High Performance Spindle Options

The MG Series spindle system is built to provide the power, versatility, and accuracy needed for large-scale machining operations. Designed for heavy-duty cutting as well as high-speed precision work, the spindle ensures outstanding performance across a wide range of applications.

Spindle Highlights

  • Standard Spindle: Geared 6,000 rpm spindle for heavy-duty versatility.
  • Optional Spindles:
    • Geared 4,000 rpm spindle (Taper 50) for ultra-heavy roughing.
    • Built-in 8,000 rpm spindle for high-speed machining of lighter alloys.
  • Rapid Traverse Rates: 10 m/min (X), 18 m/min (Y), and 12 m/min (Z) for efficient machining cycles.

MG Cutting5

Versatile, Heavy-Duty Performance

Designed for versatility, the spindle head can be equipped with a new-generation automatic 5° index mechanism and optional multi-head configurations, enabling efficient multi-face machining that delivers exceptional value to customers. The automatic multi-head exchange system further boosts productivity, ensuring seamless operations while maintaining precision. Each head storage position is equipped with a positioning sensor, guaranteeing accurate placement and reliable functionality.

For precision assurance, the MG Series features an automatic tool length measurement system capable of detecting tool wear during operation. The system also incorporates an anti-dust head storage design, preventing chip and dust contamination to maximize the reliability of automatic head exchanges. With the capacity to store up to five heads in its automatic head storage system and compatibility with tool magazines of up to 32 tools, the MG Series provides the flexibility, precision, and reliability needed to maximize shop floor efficiency.


Models & Specifications

Table Size (W × L)in (mm)196.9 × 110.2 (5001 × 2799)
X-Axis Travelin (mm)196.9 (5001)
Y-Axis Travelin (mm)118.1 (3000)
Z-Axis Travelin (mm)39.4 (1001)
Distance from Spindle Nose to Table Topin (mm)7.9 – 47.2 (201 – 1199)
Maximum Table Loadlbs (kg)5512 (2502)
Distance Between Columnsin (mm)149.6 (3800)
Spindle Speed MaxRPM6000
Tool TaperBT50
Maximum Cutting Feedrateipm (m/min)394 (10)
Rapid Feedrate (X, Y, Z)ipm (m/min)394, 709, 472 (10, 18, 12)
Tool Storage CapacityTools32
Tool Weight Maxlbs (kg)44.1 (20)
Standard Floor Space (W × L × H)in (mm)421.7 × 258.3 × 165.4 (10711 × 6561 × 4201)
MG630MG640MG650
Table Size (W × L)in (mm)236.2 × 110.2 (5999 × 2799)236.2 × 149.6 (5999 × 3800)236.2 × 189 (5999 × 4801)
X-Axis Travelin (mm)236.2 (5999)236.2 (5999)236.2 (5999)
Y-Axis Travelin (mm)118.1 (3000)157.5 (4001)196 (4978)
Z-Axis Travelin (mm)39.4 (1001)39.4 (1001)39.4 (1001)
Distance from Spindle Nose to Table Topin (mm)7.9 – 47.2 (201 – 1199)7.9 – 47.2 (201 – 1199)7.9 – 47.2 (201 – 1199)
Maximum Table Loadlbs (kg)5512 (2502)5512 (2502)5512 (2502)
Distance Between Columnsin (mm)149.6 (3800)189 (4801)228.3 (5799)
Spindle Speed MaxRPM600060006000
Tool TaperBT50BT50BT50
Maximum Cutting Feedrateipm (m/min)394 (10)394 (10)394 (10)
Rapid Feedrate (X, Y, Z)ipm (m/min)394, 709, 472 (10, 18, 12)394, 591, 472 (10, 15, 12)394, 472, 472 (10, 12, 12)
Tool Storage CapacityTools323232
Tool Weight Maxlbs (kg)44.1 (20)44.1 (20)44.1 (20)
Standard Floor Space (W × L × H)in (mm)483.3 × 258.3 × 165.4 (12276 × 6561 × 4201)483 × 298 × 165 (12268 × 7569 × 4191)482.7 × 337 × 165 (12261 × 8560 × 4191)
MG830MG840MG850
Table Size (W × L)in (mm)315 × 110.2 (8001 × 2799)315 × 149.6 (8001 × 3800)315 × 189 (8001 × 4801)
X-Axis Travelin (mm)315 (8001)315 (8001)315 (8001)
Y-Axis Travelin (mm)118.1 (3000)157.5 (4001)196 (4978)
Z-Axis Travelin (mm)39.4 (1001)39.4 (1001)39.4 (1001)
Distance from Spindle Nose to Table Topin (mm)7.9 – 47.2 (201 – 1199)7.9 – 47.2 (201 – 1199)7.9 – 47.2 (201 – 1199)
Maximum Table Loadlbs (kg)5512 (2502)5512 (2502)5512 (2502)
Distance Between Columnsin (mm)149.6 (3800)189 (4801)228.3 (5799)
Spindle Speed MaxRPM600060006000
Tool TaperBT50BT50BT50
Maximum Cutting Feedrateipm (m/min)394 (10)394 (10)394 (10)
Rapid Feedrate (X, Y, Z)ipm (m/min)394, 709, 472 (10, 18, 12)394, 591, 472 (10, 15, 12)394, 472, 472 (10, 12, 12)
Tool Storage CapacityTools323232
Tool Weight Maxlbs (kg)44.1 (20)44.1 (20)44.1 (20)
Standard Floor Space (W × L × H)in (mm)562 × 258.3 × 165.4 (14275 × 6561 × 4201)562 × 298 × 165 (14275 × 7569 × 4191)561.8 × 337 × 165 (14270 × 8560 × 4191)
MG1030MG1040MG1050
Table Size (W × L)in (mm)393.7 × 110.2 (10000 × 2799)393.7 × 149.6 (10000 × 3800)393.7 × 189 (10000 × 4801)
X-Axis Travelin (mm)393.7 (10000)393.7 (10000)393.7 (10000)
Y-Axis Travelin (mm)118.1 (3000)157.5 (4001)196 (4978)
Z-Axis Travelin (mm)39.4 (1001)39.4 (1001)39.4 (1001)
Distance from Spindle Nose to Table Topin (mm)7.9 – 47.2 (201 – 1199)7.9 – 47.2 (201 – 1199)7.9 – 47.2 (201 – 1199)
Maximum Table Loadlbs (kg)5512 (2502)5512 (2502)5512 (2502)
Distance Between Columnsin (mm)149.6 (3800)189 (4801)228.3 (5799)
Spindle Speed MaxRPM600060006000
Tool TaperBT50BT50BT50
Maximum Cutting Feedrateipm (m/min)394 (10)394 (10)394 (10)
Rapid Feedrate (X, Y, Z)ipm (m/min)394, 709, 472 (10, 18, 12)394, 591, 472 (10, 15, 12)394, 472, 472 (10, 12, 12)
Tool Storage CapacityTools323232
Tool Weight Maxlbs (kg)44.1 (20)44.1 (20)44.1 (20)
Standard Floor Space (W × L × H)in (mm)640.7 × 258.3 × 165.4 (16274 × 6561 × 4201)640.7 × 298 × 165 (16274 × 7569 × 4191)640.6 × 337 × 165 (16271 × 8560 × 4191)