| Model | Unit | PTM350 | ||
|---|---|---|---|---|
| Max. swing over bed | mm (in) | Ф1000 (39’’) | ||
| Max. swing over carriage | mm (in) | Ф640 (25’’) | ||
| Max length of workpiece between centers | mm | 1500,2000,3000,4000,5000,6000 | ||
| Max weight of workpiece between centers | kg | 6000 | ||
| Spindle bore | mm (in) | Ф360 (14’’) | ||
| Range of spindle speed | rpm | 6.3-315 | ||
| Min. clamping diameter of chuck | mm (in) | Ф240 (9’’) | ||
| Longitudinal feed | mm/r | 56; 0.1-12 | ||
| Transverse feed | mm/r | 56; 0.05-6 | ||
| Upper tool post feed | mm/r | 56; 0.025-3 | ||
| Metric thread (pitch) kinds/range | mm | 44 1-120mm | ||
| Whitworth kinds/range | TPI | 37 30-1 -1/8 | ||
| Module threads kinds/range | MP | 46 0.5-60 | ||
| Diametrical thread kinds/range | DP | 46 0.5-60 | ||
| Rapid traverse of tool post | Longitudinal / Cross | mm/min | 3740 / 1870 | |
| Upper tool post | mm/min | 935 | ||
| Max travel of cross slide | mm (in) | 520 (20’’) | ||
| Max travel of upper tool post | mm (in) | 300 (12’’) | ||
| Taper turning | Max. cutting length | mm (in) | 300 (12’’) | |
| Taper turning | ±1:4 | |||
| Diameter of tailstock sleeve | mm (in) | Ф160 (6’’) | ||
| Taper of tailstock sleeve | Metric 80 | |||
| Max travel of tailstock sleeve | mm (in) | 300 (12’’) | ||
| Power of main motor | kW | 22 | ||
Applications
Fortune Pacific PTM350 Big Bore Oil Country Oil Field Pipe-threading Lathe Machine is greatly applied in the oil country. Hollow spindle, geared head machine tool Torno is designed to meet the demanding requirements of oil industry. Fortune Pacific Brand Big Bore Oil Country Oil Field Pipe-threading Lathe Machine is used primarily for turning and threading large diameter of oil field parts. Examples include, drill pipe, wash pipe, pins, and casing connectors used in the energy industry. Fortune Pacific Brand PTM350 Big Bore Oil Country Oil Field Pipe-threading Lathe Machine machinery is also used for machining large diameter tubes, shafts and cutting a wide range of inch or metric threads; A.P.I. tapered, modular, or diametric.
Features
1. Extra rigid one piece floor-type casting structure is used in PTM350 Oil Country Pipe Threading Lathe Torno;
2. Big Bore Oil Country Oil Field Pipe-threading Lathe Machine has a wide range of feeds & threads;
3. Metric / Whitworth dual gear box free for gear exchange;
4. Specialized design for long pipe and petroleum industry components threading.
Standard Accessories
1. 4-Jaws chuck: 800 mm;
2. Steady rest;
3. Follow rest;
4. Taper turning device;
5. Dead center;
6. Coolant system;
7. Work light;
8. Tool box;
Optional Accessories
1. Steady rest;
2. Supporter with rollers;
3. Living center;
4. Motorized tailstock;
5. 2-axis or 3-axis DRO;
1. 4-Jaws chuck: 800 mm;
2. Steady rest;
3. Follow rest;
4. Taper turning device;
5. Dead center;
6. Coolant system;
7. Work light;
8. Tool box;
1. Steady rest;
2. Supporter with rollers;
3. Living center;
4. Motorized tailstock;
5. 2-axis or 3-axis DRO;
1. Extra rigid one piece floor-type casting structure is used in PTM350 Oil Country Pipe Threading Lathe Torno;
2. Big Bore Oil Country Oil Field Pipe-threading Lathe Machine has a wide range of feeds & threads;
3. Metric / Whitworth dual gear box free for gear exchange;
4. Specialized design for long pipe and petroleum industry components threading.
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.