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A machine tool may have several spindles, such as the headstock and tailstock spindles on a bench lathe. The main spindle is usually the biggest one. References to "the spindle" without further qualification imply the main spindle. Some machine tools that specialize in high-volume mass production have a group of 4, 6, or even more main spindles.
More modern spinning machines use a mechanical means to rotate the spindle, as well as an automatic method to draw out fibres, and devices to work many spindles together at speeds previously unattainable. [17] Newer technologies that offer even faster yarn production include friction spinning, an open-end system, and air jets. [19]
The mechanical toolpath guidance grew out of various root concepts: First is the spindle concept itself, which constrains workpiece or tool movement to rotation around a fixed axis . This ancient concept predates machine tools per se; the earliest lathes and potter's wheels incorporated it for the workpiece, but the movement of the tool itself ...
A jewel bearing is a plain bearing in which a metal spindle turns in a jewel-lined pivot hole. The hole is typically shaped like a torus and is slightly larger than the shaft diameter. The jewels are typically made from the mineral corundum, usually either synthetic sapphire or synthetic ruby. Jewel bearings are used in precision instruments ...
In mechanical engineering, a shaft is a rotating machine element, ... Spindle shaft. Materials. The material used for ordinary shafts is mild steel.
The peak of popularity for building this type of spindle nose was the 1940s and 1950s. The chuck may be held against the taper with cam-lock posts that wedge into a stuck-fast position. Industry-standard spindle nose designs allow wide interchangeability. This cam lock spindle nose system replaced the earlier systems on most machine tools in ...
A segmented spindle, also known by the trademark Kataka, is a specialized mechanical linear actuator conceived by the Danish mechanical engineer Jens Joerren Soerensen during the mid-1990s. [1] The actuator forms a telescoping tubular column, or spindle, from linked segments resembling curved parallelograms. The telescoping linear actuator has ...
Figure 1. C-frame milling machine modified for friction extrusion. At left is an overview image and at right is a close up of the mechanical spindle which provides die rotation and the hydraulic cylinder that provides the extrusion pressure. Wire is extruded vertically through the hollow draw bar of the milling machine.
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