| Model | Unit | RTM500 |
| Type | TC | |
| Max. diameter of workpiece | mm | 500 (20”) |
| Shaft angle | ° | 90° |
| Vertical movement of driven box (above / below centerline) | mm | 75 / 75 (3”) |
| Distance from driving spindle center to driven spindle end face | mm | 120-310 (4.7-12”) |
| Distance from driven spindle center to driving spindle end face | mm | 120-320 (4.7-13”) |
| Driving spindle speed | rpm | 720 / 1440rpm |
| Diameter of bigger end of taper hole | mm | Φ100 (3.9”) |
| Depth of bigger end of taper hole | mm | 180 (7”) |
| Spindle taper | 1:20 | |
| Clamping force for workpiece | Nm | 17000 |
| Main motor power (double speed motor) | kW | 3 / 4.5 |
| Machine dimensions | mm | 1560x1422x1690 |
| Electric cabinet dimension | mm | 600x360x1235 |
| Net weight | kg | 3000 |
With the rolling method of a pair of gears or a gear and a master gear, RTM500 TC tests the tooth bearings of straight bevel, spiral bevel and hypoid gears of intersecting shafts of gear generating machine.
The following tests may be performed:
(1) The final tests of a gear pair to determine the tooth bearing and the best mounting distance;
(2) Determine the necessary setting data for the gear cutting machines;
(3) Continuous tests during the production to guarantee the uniformity of the gears produced;
(4) Gain new setting data for the gear cutting machines through comparisons of the testing results before and after the heat treatment.
| Model | Unit | RTM500 |
| Type | TC | |
| Max. diameter of workpiece | mm | 500 (20”) |
| Shaft angle | ° | 90° |
| Vertical movement of driven box (above / below centerline) | mm | 75 / 75 (3”) |
| Distance from driving spindle center to driven spindle end face | mm | 120-310 (4.7-12”) |
| Distance from driven spindle center to driving spindle end face | mm | 120-320 (4.7-13”) |
| Driving spindle speed | rpm | 720 / 1440rpm |
| Diameter of bigger end of taper hole | mm | Φ100 (3.9”) |
| Depth of bigger end of taper hole | mm | 180 (7”) |
| Spindle taper | 1:20 | |
| Clamping force for workpiece | Nm | 17000 |
| Main motor power (double speed motor) | kW | 3 / 4.5 |
| Machine dimensions | mm | 1560x1422x1690 |
| Electric cabinet dimension | mm | 600x360x1235 |
| Net weight | kg | 3000 |
With the rolling method of a pair of gears or a gear and a master gear, RTM500 TC tests the tooth bearings of straight bevel, spiral bevel and hypoid gears of intersecting shafts of gear generating machine.
The following tests may be performed:
(1) The final tests of a gear pair to determine the tooth bearing and the best mounting distance;
(2) Determine the necessary setting data for the gear cutting machines;
(3) Continuous tests during the production to guarantee the uniformity of the gears produced;
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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