| Items | BR40 | |
| Machining capacity | ||
| Max. swing over bed | Φ400 mm | |
| Max. swing over slide | Φ260 mm | |
| Max. turning length | 400 mm | 1000 mm |
| Max. turning diameter | Φ285 mm | |
| Max. bar diameter | Φ42 mm | |
| Spindle | ||
| Spindle nose | A2-5 | |
| Spindle through-hole diameter | Φ57 mm | |
| Spindle speed | 70-3000 r/min | |
| Main motor power | 7.5 kW | |
| Hydraulic chuck diameter | 6 inch | |
| Travel and rapid traverse | ||
| Travel of X axis | 165 mm | |
| Travel of Z axis | 410 mm | 1030 mm |
| Rapid traverse of X/Z axis | 12 / 16 m/min | |
| Tailstock | ||
| Diameter of tailstock quill | Φ70 mm | |
| Travel of tailstock quill | 80 mm | |
| Taper of tailstock center | MT-4 | |
| Turret | ||
| No. of turret station | 8 (or 12) | |
| Turning tool size | 20x20 mm | |
| Boring tool size | Φ32 mm | |
| Accuracy | ||
| Position accuracy of X/Z axis | X:0.010mm; Z: 0.010mm | |
| Repeatable position X/Z axis | X:0.005mm; Z: 0.005mm | |
| Other | ||
| Slant angle | 45° | |
| Type guide ways | Box way | |
| Overall dimension | 2370x1670x1970mm | 3200x1670x1970mm |
| Net weight | 3000 kg | 4500 kg |
| Item 01 | Descriptions | |
| 01.01 | FANUC Oi TF | |
| 01.02 | FANUC X/Z axis servo motor | |
| 01.03 | CTB AC servo spindle motor | |
| 01.04 | 6’’ 3 jaw hollow hydraulic chuck | |
| 01.05 | Hydraulic tailstock | |
| 01.06 | 8-station tool post | |
| 01.07 | Coolant system. | |
| 01.08 | Working light | |
| 01.09 | Automatic lubrication system | |
| 01.10 | Heat exchange for electric cabinet | |
| 01.11 | Full enclosed splash guard | |
| 01.12 | Installation damping pads |
| Item 02 | Descriptions | |
| 02.01 | SIEMENS828D SIEMENS808D or GSK980T CNC system | |
| 02.02 | Chip conveyor | |
| 02.03 | 12-station tool post | |
| 02.04 | FANUC AC servo spindle motor |
Features
These series machines are high precision CNC machines with good performance-price ratio.
The high grade cast iron bed, slant rails and box way guide-way.
High precision cartridge type spindle are designed to damp vibration.
The multi-station turret changes tools in the nearest path.
This series lathe can be equipped with FANUC0i-TF(5), Siemens 828D or other control systems.
These series machines are high precision CNC machines with good performance-price ratio.
The high grade cast iron bed, slant rails and box way guide-way.
High precision cartridge type spindle are designed to damp vibration.
The multi-station turret changes tools in the nearest path.
This series lathe can be equipped with FANUC0i-TF(5), Siemens 828D or other control systems.
| Item 01 | Descriptions | |
| 01.01 | FANUC Oi TF | |
| 01.02 | FANUC X/Z axis servo motor | |
| 01.03 | CTB AC servo spindle motor | |
| 01.04 | 6’’ 3 jaw hollow hydraulic chuck | |
| 01.05 | Hydraulic tailstock | |
| 01.06 | 8-station tool post | |
| 01.07 | Coolant system. | |
| 01.08 | Working light | |
| 01.09 | Automatic lubrication system | |
| 01.10 | Heat exchange for electric cabinet | |
| 01.11 | Full enclosed splash guard | |
| 01.12 | Installation damping pads |
| Item 02 | Descriptions | |
| 02.01 | SIEMENS828D SIEMENS808D or GSK980T CNC system | |
| 02.02 | Chip conveyor | |
| 02.03 | 12-station tool post | |
| 02.04 | FANUC AC servo spindle motor |
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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