| Items | BL7525C |
| Machining capacity | |
| Max. swing over bed | Φ550 mm |
| Max. swing over slide | Φ370 mm |
| Max. turning length | 500 /1000mm |
| Max. turning diameter | Φ450 mm |
| Max. bar diameter | Φ73 mm |
| Spindle | |
| Spindle nose | A2-8 |
| Spindle through-hole diameter | Φ87 mm |
| Spindle speed | 30-3000 r/min |
| Main motor power | 15/18.5 kW |
| Hydraulic chuck diameter | 10 inch |
| Travel and rapid traverse | |
| Travel of X axis | 250 mm |
| Travel of Z axis | 550/1010 |
| Rapid traverse of X/Z axis | 24/24 m/min |
| Tailstock | |
| Diameter of tailstock quill | Φ100 mm |
| Travel of tailstock quill | 100 mm |
| Taper of tailstock center | MT-5 |
| Turret | |
| No. of turret station | 12(optional:8) |
| Turning tool size | 25x25 mm |
| Boring tool size | Φ40 mm |
| Other | |
| Slant angle | 45° |
| Guide way type | Linear guide way |
| Overall dimension | 500mm: 2980x1850x2050 mm 1000mm:3785x1850x2050 mm |
| Net weight | 4800 /5300 kg |
| Item 01 | Descriptions | |
| 01.01 | FANUC Oi TF | |
| 01.02 | FANUC X/Z axis servo motor ;FANUC AC servo spindle motor | |
| 01.03 | X/Z axis linear guideway | |
| 01.04 | 10’’ 3 jaw hollow hydraulic chuck | |
| 01.05 | Hydraulic tailstock | |
| 01.06 | Italian DM 12- 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 |
Optionals
| Item 02 | Descriptions | |
| 02.01 | SIEMENS828D CNC system | |
| 02.02 | Chip conveyor | |
| 02.03 | 8- station tool post |
- An extremely precision cartridge type. the high grade cast iron bed designed to damp vibration and assures.
- 45 degree slant bed type structure provides more convenient chip disposal and handling of the work piece.
- 8-station turret rotates steadily and assures high positioning accuracy and short tool-change time.
- Spindle bearing from famous companies , with high accuracy and long service time.
| Items | BL7525C |
| Machining capacity | |
| Max. swing over bed | Φ550 mm |
| Max. swing over slide | Φ370 mm |
| Max. turning length | 500 /1000mm |
| Max. turning diameter | Φ450 mm |
| Max. bar diameter | Φ73 mm |
| Spindle | |
| Spindle nose | A2-8 |
| Spindle through-hole diameter | Φ87 mm |
| Spindle speed | 30-3000 r/min |
| Main motor power | 15/18.5 kW |
| Hydraulic chuck diameter | 10 inch |
| Travel and rapid traverse | |
| Travel of X axis | 250 mm |
| Travel of Z axis | 550/1010 |
| Rapid traverse of X/Z axis | 24/24 m/min |
| Tailstock | |
| Diameter of tailstock quill | Φ100 mm |
| Travel of tailstock quill | 100 mm |
| Taper of tailstock center | MT-5 |
| Turret | |
| No. of turret station | 12(optional:8) |
| Turning tool size | 25x25 mm |
| Boring tool size | Φ40 mm |
| Other | |
| Slant angle | 45° |
| Guide way type | Linear guide way |
| Overall dimension | 500mm: 2980x1850x2050 mm 1000mm:3785x1850x2050 mm |
| Net weight | 4800 /5300 kg |
| Item 01 | Descriptions | |
| 01.01 | FANUC Oi TF | |
| 01.02 | FANUC X/Z axis servo motor ;FANUC AC servo spindle motor | |
| 01.03 | X/Z axis linear guideway | |
| 01.04 | 10’’ 3 jaw hollow hydraulic chuck | |
| 01.05 | Hydraulic tailstock | |
| 01.06 | Italian DM 12- 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 |
- An extremely precision cartridge type. the high grade cast iron bed designed to damp vibration and assures.
- 45 degree slant bed type structure provides more convenient chip disposal and handling of the work piece.
- 8-station turret rotates steadily and assures high positioning accuracy and short tool-change time.
- Spindle bearing from famous companies , with high accuracy and long service time.
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.