PT250 CNC Oil Country Oil Field Pipe Threading Lathe
- PT250 CNC Oil Country Pipe Threading LatheDownload
| Items | PT250 |
| Capacity | |
| Max swing over bed | Ø800mm |
| Max swing over cross slide | Ø480mm |
| Pipe threading range | Φ50-250mm |
| Width of bed way | 600mm |
| Max. load capacity | 4000kg |
| Distance between centers | 1000/1500/3000mm |
| Spindle | |
| Spindle bore | Φ255mm |
| Spindle speed steps | 4steps (Variable frequency ) |
| Spindle speed range | 20-400rpm |
| Chuck size | Φ630mm（4-jaw manual） |
| Spindle motor power | 15kW |
| Travel and rapid traverse | |
| X axis travel | 420mm |
| Z axis travel | 750/1250/2750mm |
| X axis rapid traverse speed | 4m/min |
| Z axis rapid traverse speed | 6m/min |
| Turret | |
| Number of tool station | 4-position |
| Tool cross section | 32x32mm |
| Tailstock | |
| Tailstock sleeve diameter | Φ120mm |
| Tailstock sleeve travel | 250mm |
| Tailstock sleeve taper (manual) | MT-6 |
| Others | |
| Overall dimensions (L×W×H) | 1000mm: 3800x1930x1900mm 1500mm: 4300x1930x1900mm 3000mm: 5800x1930x1900mm |
| Net weight | 1000mm: 6000kg 1500mm: 6500kg, 3000mm: 7500kg |
| Item 01 | Descriptions | |
| 01.01 | SIEMENS 808DA | |
| 01.02 | SIEMENS servo motor of X/Z axis | |
| 01.03 | Inverter spindle motor | |
| 01.04 | 4-Jaw manual chuck 630mm | |
| 01.05 | Manual tailstock | |
| 01.06 | 4-station electric tool post | |
| 01.07 | Coolant system. | |
| 01.08 | Lubrication system | |
| 01.09 | Working light | |
| 01.10 | Signal light; | |
| 01.11 | Safety door-lock; | |
| 01.12 | Foundation bolt |
| Item 02 | Descriptions | |
| 02.01 | FANUC 0i TF/ SIEMENS 828D/ GSK980TDi | |
| 02.02 | Rear support bracket | |
| 02.03 | Steady rest |
This machine was designed for use in demanding petroleum industry applications and integrates decades of experience with high reliability and high precision.
Machine bed
The surface of bed ways is supersonic frequency hardened and precision ground.
Big spindle bore and double chuck to ensure process big size pipes
One-piece bed adopts high strength iron to ensure rigidity and precision
Ultrasonic frequency quenched guideways ensure high hardness and good wear-resistance
Carriage and guidways contact surface use Turcite B to maintain good accuracy.
Machine bed
The surface of bed ways is supersonic frequency hardened and precision ground.
One-piece bed adopts high strength iron to ensure rigidity and precision
Ultrasonic frequency quenched guideways ensure high hardness and good wear-resistance
Carriage and guidways contact surface use Turcite B to maintain good accuracy.
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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