Model | STR160 |
---|---|
Max. swing over bed/saddle | Φ500/300mm |
Max. machining shaft diameter | Φ160mm |
Max. machining length | 300mm |
Bar capacity | Φ45mm |
Max. dia. of workpiece through spindle hole | Φ45mm |
Travel of X-axis/Z-axis | 125/350mm |
spindle motor output power | 5.5/7.5kW |
The form of spindle end | A2-5 |
Max. spindle speed | 6000rpm |
Hydraulic tailstock center | MT4 |
Chuck inch | 6” |
Servo turret | 8 |
Rapid feed rate (X-axis/Z-axis) | 30/30 m/min |
Size of lathe tool | 20x20mm |
Max. dia. of boring bar | 32mm |
Positioning accuracy (X/Z-axis) | 0.008/0.008mm |
Repeatability (X/Z-axis) | 0.004/0.004mm |
Power capacity | 15 kVA |
Machine dimension(L x W x H) | 2000x2250x1550mm |
Net weight | 3000kg |
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.
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.
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.
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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