| Items | PT350 |
| Capacity | |
| Max swing over bed | Ø900mm |
| Max swing over cross slide | Ø535mm |
| Pipe threading range | Φ110-350mm |
| Width of bed way | 705mm |
| Max. load capacity | 5000kg |
| Distance between centers | 1000mm |
| Spindle | |
| Spindle bore | Φ355mm |
| Spindle speed steps | Step-less |
| Spindle speed range | 90-350rpm |
| Chuck size | Φ780mm（4-jaw electrical combination chuck） |
| Spindle motor power | 22kW |
| Travel and rapid traverse | |
| X axis travel | 480mm |
| Z axis travel | 1000mm |
| X axis rapid traverse speed | 4m/min |
| Z axis rapid traverse speed | 6m/min |
| Turret | |
| Number of tool station | 4-position |
| Tool cross section | 40x40mm |
| Others | |
| Overall dimensions (L×W×H) | 1000mm:3950x2050x2050mm |
| Net weight | 1000mm:8900kg |
| 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 electrical combination chuck Φ780mm | |
| 01.05 | 4-station electric tool post | |
| 01.06 | Coolant system. | |
| 01.07 | Lubrication system | |
| 01.08 | Working light | |
| 01.09 | Signal light; | |
| 01.10 | Foundation bolt |
| Item 02 | Descriptions | |
| 02.01 | FANUC 0i TF/ SIEMENS 828D/ GSK980TDi | |
| 02.02 | Rear support bracket |
Briefs
| Items | PT350 |
| Capacity | |
| Max swing over bed | Ø900mm |
| Max swing over cross slide | Ø535mm |
| Pipe threading range | Φ110-350mm |
| Width of bed way | 705mm |
| Max. load capacity | 5000kg |
| Distance between centers | 1000mm |
| Spindle | |
| Spindle bore | Φ355mm |
| Spindle speed steps | Step-less |
| Spindle speed range | 90-350rpm |
| Chuck size | Φ780mm（4-jaw electrical combination chuck） |
| Spindle motor power | 22kW |
| Travel and rapid traverse | |
| X axis travel | 480mm |
| Z axis travel | 1000mm |
| X axis rapid traverse speed | 4m/min |
| Z axis rapid traverse speed | 6m/min |
| Turret | |
| Number of tool station | 4-position |
| Tool cross section | 40x40mm |
| Others | |
| Overall dimensions (L×W×H) | 1000mm:3950x2050x2050mm |
| Net weight | 1000mm:8900kg |
| 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 electrical combination chuck Φ780mm | |
| 01.05 | 4-station electric tool post | |
| 01.06 | Coolant system. | |
| 01.07 | Lubrication system | |
| 01.08 | Working light | |
| 01.09 | Signal light; | |
| 01.10 | Foundation bolt |
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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