Model | Unit | GMC3230B | GMC4230B | GMC5230B | |
---|---|---|---|---|---|
Standard controller | FANUC 0i MF | ||||
Travel |
X axis travel(work-table) | mm | 3200 | 4200 | 5100 |
Y axis travel(saddle) | mm | 3400 | |||
Z axis travel(spindle head) | mm | 1000 | |||
Distance from spindle nose to table | mm | 235-1235 | |||
Distance between columns | mm | 3050 | |||
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 | Arm 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 | 40500 | 45500 | 50500 |
Model | Unit | GMC3230B | GMC4230B | GMC5230B | |
---|---|---|---|---|---|
Standard controller | FANUC 0i MF | ||||
Travel |
X axis travel(work-table) | mm | 3200 | 4200 | 5100 |
Y axis travel(saddle) | mm | 3400 | |||
Z axis travel(spindle head) | mm | 1000 | |||
Distance from spindle nose to table | mm | 235-1235 | |||
Distance between columns | mm | 3050 | |||
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 | Arm 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 | 40500 | 45500 | 50500 |
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.
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.
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.
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.