| Items | UHM30 | UHM30A |
| Working area | ||
| Worktable size (L×W) | 1270x300mm(50x11.8”) | 1370x300mm (54x11.8”) |
| T slot (Width x No. x pitch) | 14x3x80mm | 14x3x80mm |
| Max. load of table | 300kg | 300kg |
| Table rotation | optional: ±45° | optional: ±45° |
| Distance from horizontal spindle center to worktable surface | 75-475mm (3-18.7”) | 75-475mm (3-18.7”) |
| Distance from spindle center to ram surface | 155mm (6.1”) | 155mm (6.1”) |
| Travels | ||
| Worktable travel (X) | 720mm (28.3”) | 820mm (32.2”) |
| Worktable travel (Y) | 300mm (11.8) | 300mm (11.8) |
| Worktable travel (Z) | 400mm (15.7”) | 400mm (15.7”) |
| Spindle | ||
| Horizontal spindle speed | 12 steps; 35-1500rpm | 12 steps; 35-1500rpm |
| Spindle taper | 7:24, ISO40 | 7:24, ISO40 |
| Motor power | 3kW | 3kW |
| Feed | ||
| Rapid feed (X/Y/Z) | 1000/1000/750mm/min | 1000/1000/750mm/min |
| Feed range (X/Y) | 30-830mm/min | 30-830mm/min |
| Feed range (Z) | 23-625mm/min | 23-625mm/min |
| Others | ||
| Machine size (L×W×H) | 1720x1680x1730mm | 1820x1680x1730mm |
| Net weight | 1500kg | 1550kg |
| Item 01 | Descriptions | |
| 01.01 | Draw bar | |
| 01.02 | Lifting crank | |
| 01.03 | Horizontal arbor assembly; | |
| 01.04 | Working lamp | |
| 01.05 | Coolant system | |
| 01.06 | Central lubrication | |
| 01.07 | Double-ended wrench | |
| 01.08 | Inner hexagon spanner | |
| 01.09 | Vertical milling head | |
| 01.10 | Operator manual |
| Item 02 | Descriptions | |
| 02.01 | 3-aixs Digital Read Out | |
| 02.02 | Work table rotary±45° | |
| 02.03 | Hang up panel(Aluminum) | |
| 02.04 | Dividing head | |
| 02.05 | Rotary table | |
| 02.06 | Machine vise 160mm | |
| 02.07 | Milling chuck (ISO40) | |
| 02.08 | Clamping kits |
Features
Massive machine frame with very rigid knee slide;
Powerful gear-driven head for heavy cutting;
Driven by AC servo motor to achieve automatic table feed and rapid feed on X, Y and Z axes;
Hardened and ground table for precision clamping and heavy load;
Worktable swivels ±45° on the horizontal plane is optional;
Applications
UHM30 Universal Overhanging Arm Horizontal Knee type Milling Machine has better construction and superior machining functions such as drilling, boring, milling of plane, inclined plane and slot, and such functions available by use of the corresponding attachments.
Over Arm / Overhanging Arm of Heavy-duty Horizontal Milling Machine
Over Arm / Overhanging Arm of Heavy-duty Horizontal Milling Machine is a horizontal beam present at the top face of the column. Over Arm / Overhanging Arm of Heavy-duty Horizontal Milling Machine may be a single casting which slides on the dovetail ways present on the top face of the column.
Introduction of Milling (machining)
Milling is the machining process of using rotary cutters to remove material from a workpiece by advancing (or feeding) the cutter into the workpiece at a certain direction. The cutter may also be held at an angle relative to the axis of the tool. Milling covers a wide variety of different operations and machines, on scales from small individual parts to large, heavy-duty gang milling operations. It is one of the most commonly used processes for machining custom parts to precise tolerances.
| Item 01 | Descriptions | |
| 01.01 | Draw bar | |
| 01.02 | Lifting crank | |
| 01.03 | Horizontal arbor assembly; | |
| 01.04 | Working lamp | |
| 01.05 | Coolant system | |
| 01.06 | Central lubrication | |
| 01.07 | Double-ended wrench | |
| 01.08 | Inner hexagon spanner | |
| 01.09 | Vertical milling head | |
| 01.10 | Operator manual |
| Item 02 | Descriptions | |
| 02.01 | 3-aixs Digital Read Out | |
| 02.02 | Work table rotary±45° | |
| 02.03 | Hang up panel(Aluminum) | |
| 02.04 | Dividing head | |
| 02.05 | Rotary table | |
| 02.06 | Machine vise 160mm | |
| 02.07 | Milling chuck (ISO40) | |
| 02.08 | Clamping kits |
1. Driven by AC servo motor to achieve automatic table feed and rapid feed on X, Y and Z axes;
2. UHM30 SL Overhanging Arm Horizontal Knee type Milling Machine worktable length is extended to 1370mm;
3. 3-point supported horizontal spindle for heavy cutting;
4. Rigid ram for easier mounting of horizontal arbor support and bracket for stable cutting;
5. Hardened and ground table for precision clamping and heavy load;
6. Worktable swivels ±45° on the horizontal plane is optional;
Over Arm / Overhanging Arm of Heavy-duty Horizontal Milling Machine
Over Arm / Overhanging Arm of Heavy-duty Horizontal Milling Machine is a horizontal beam present at the top face of the column. Over Arm / Overhanging Arm of Heavy-duty Horizontal Milling Machine may be a single casting which slides on the dovetail ways present on the top face of the column.
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.
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