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2. Machine taper - Wikipedia

   en.wikipedia.org/wiki/Machine_taper

   Drill chucks mounted by Jacobs tapers onto arbors with Morse tapers for the spindle. Spindle nose on a lathe headstock. The small female taper is a Morse taper to take a lathe center or a tool such as a twist drill. The large male taper takes a lathe chuck, which is retained by the large nut.

3. Chuck (engineering) - Wikipedia

   en.wikipedia.org/wiki/Chuck_(engineering)

   Taper spindle nose with threaded retention. The retainer ring is wrenched with a spanner wrench. A backplate with threads may screw onto a threaded spindle nose (for lathe work) or onto an adapter plate with the same nose, to be mounted on the table of milling machines or surface grinding machines. This "threaded spindle nose" type of mounting ...

4. Lathe center - Wikipedia

   en.wikipedia.org/wiki/Lathe_center

   Dead center (the conical piece) mounted in the spindle of a lathe and being used to support a workpiece being driven by a carrier setup. A lathe center, often shortened to center, is a tool that has been ground to a point to accurately position a workpiece on an axis. They usually have an included angle of 60°, but in heavy machining ...

5. Milling cutter - Wikipedia

   en.wikipedia.org/wiki/Milling_cutter

   The shell then screws onto the arbor just as old-style lathe chuck backplates screw onto the lathe's spindle nose. This method is commonly used on the 2" or 3" boring heads used on knee mills. As with the threaded-spindle-nose lathe chucks, this style of mounting requires that the cutter only make cuts in one rotary direction.

6. Spindle (tool) - Wikipedia

   en.wikipedia.org/wiki/Spindle_(tool)

   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.

7. Collet - Wikipedia

   en.wikipedia.org/wiki/Collet

   Yet another type of collet is a step collet which steps up to a larger diameter from the spindle and allows holding of larger workpieces. In use, the part to be held is inserted into the collet and then the collet is pressed (using a threaded nose cap) or drawn (using a threaded drawbar) into the body which has a conjugate taper form.