| Items | BR7516 | BR7516A |
| Machining capacity | ||
| Max. swing over bed | Φ400 mm | Φ400 mm |
| Max. swing over slide | Φ260 mm | Φ260 mm |
| Max. turning length | 400 mm | 400 mm |
| Max. turning diameter | Φ285 mm | Φ285 mm |
| Max. bar diameter | Φ42 mm | Φ42 mm |
| Spindle | ||
| Spindle nose | A2-5 | A2-5 |
| Spindle through-hole diameter | Φ57 mm | Φ57 mm |
| Spindle speed | 55-5500 r/min | 80-3500 r/min |
| Main motor power | 11/15 kW | 7.5/11 kW |
| Hydraulic chuck diameter | 6 inch | 6 inch |
| Travel and rapid traverse | ||
| Travel of X axis | 165 mm | 165 mm |
| Travel of Z axis | 410 mm | 410 mm |
| Rapid traverse of X/Z axis | 12 / 16 m/min | 12 / 16 m/min |
| Tailstock | ||
| Diameter of tailstock quill | Φ70 mm | Φ70 mm |
| Travel of tailstock quill | 80 mm | 80 mm |
| Taper of tailstock center | MT-4 | MT-4 |
| Turret | ||
| No. of turret station | 12(optional:8) | 12(optional:8) |
| Turning tool size | 20x20 mm | 20x20 mm |
| Boring tool size | Φ32 mm | Φ32 mm |
| Other | ||
| Slant angle | 45° | 45° |
| Guide way type | Box way | Box way |
| Overall dimension | 2370x1670x1970 mm | |
| Net weight | 3000 kg | |
| Item 01 | Descriptions | |
| 01.01 | FANUC Oi TF | |
| 01.02 | FANUC X/Z axis servo motor | |
| 01.03 | BR7516:FANUC AC servo spindle motor BR7516A: CTB AC servo spindle motor |
|
| 01.04 | 6’’ 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 |
| Item 02 | Descriptions | |
| 02.01 | SIEMENS828D CNC system | |
| 02.02 | Chip conveyor | |
| 02.03 | 8-station tool post |
Features
l This series lathe, designed with high vibration strength, adopts high grade cast iron, one piece of bed base, slant guideways, a high precision through-hole spindle driven by large-field AC main motor.
l The multi-station turret indexes fast and continuously with a high repeatability and changes tool proximately.
l The lathe is designed with unique appearance, easy-operated panel, full-enclosed guard, which can prevent the leakage of water, power and oil effectively. It is the most powerful product in its class due to the large power, excellent accuracy and high performance
l This series lathe can be equipped with FANUC0i-TF, Siemens 828D or other control systems.
l This series lathe, designed with high vibration strength, adopts high grade cast iron, one piece of bed base, slant guideways, a high precision through-hole spindle driven by large-field AC main motor.
l The multi-station turret indexes fast and continuously with a high repeatability and changes tool proximately.
l The lathe is designed with unique appearance, easy-operated panel, full-enclosed guard, which can prevent the leakage of water, power and oil effectively. It is the most powerful product in its class due to the large power, excellent accuracy and high performance
l This series lathe can be equipped with FANUC0i-TF, Siemens 828D or other control systems.
| Items | BR7516 | BR7516A |
| Machining capacity | ||
| Max. swing over bed | Φ400 mm | Φ400 mm |
| Max. swing over slide | Φ260 mm | Φ260 mm |
| Max. turning length | 400 mm | 400 mm |
| Max. turning diameter | Φ285 mm | Φ285 mm |
| Max. bar diameter | Φ42 mm | Φ42 mm |
| Spindle | ||
| Spindle nose | A2-5 | A2-5 |
| Spindle through-hole diameter | Φ57 mm | Φ57 mm |
| Spindle speed | 55-5500 r/min | 80-3500 r/min |
| Main motor power | 11/15 kW | 7.5/11 kW |
| Hydraulic chuck diameter | 6 inch | 6 inch |
| Travel and rapid traverse | ||
| Travel of X axis | 165 mm | 165 mm |
| Travel of Z axis | 410 mm | 410 mm |
| Rapid traverse of X/Z axis | 12 / 16 m/min | 12 / 16 m/min |
| Tailstock | ||
| Diameter of tailstock quill | Φ70 mm | Φ70 mm |
| Travel of tailstock quill | 80 mm | 80 mm |
| Taper of tailstock center | MT-4 | MT-4 |
| Turret | ||
| No. of turret station | 12(optional:8) | 12(optional:8) |
| Turning tool size | 20x20 mm | 20x20 mm |
| Boring tool size | Φ32 mm | Φ32 mm |
| Other | ||
| Slant angle | 45° | 45° |
| Guide way type | Box way | Box way |
| Overall dimension | 2370x1670x1970 mm | |
| Net weight | 3000 kg | |
| Item 01 | Descriptions | |
| 01.01 | FANUC Oi TF | |
| 01.02 | FANUC X/Z axis servo motor | |
| 01.03 | BR7516:FANUC AC servo spindle motor BR7516A: CTB AC servo spindle motor |
|
| 01.04 | 6’’ 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 |
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.