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2. Machine taper - Wikipedia

   en.wikipedia.org/wiki/Machine_taper

   The National Machine Tool Builders Association (now called the Association for Manufacturing Technology) defined a steep taper that is commonly used on milling machines. The taper is variously referred to as NMTB, NMT or NT. The taper is 3.500 inches per foot and is also referred to as "7 in 24" or 7/24; the computed angle is 16.5943 degrees. [8]

3. Drawbar (machine tool) - Wikipedia

   en.wikipedia.org/wiki/Drawbar_(machine_tool)

   Drawbar (machine tool) A W-type external-thread collet (red) being pulled into its spindle seat (green) with a drawbar (blue), clamping and then releasing a shaft. A drawbar or spindle drawbar is a clamping mechanism for toolholders on machine tools. The toolholder or machine taper itself is held by the draw bar and applies force to the spindle ...

4. Milling (machining) - Wikipedia

   en.wikipedia.org/wiki/Milling_(machining)

   Milling is the process of machining using rotary cutters to remove material [ 1 ] by advancing a cutter into a workpiece. This may be done by varying directions [ 2 ] on one or several axes, cutter head speed, and pressure. [ 3 ] Milling covers a wide variety of different operations and machines, on scales from small individual parts to large ...

5. Boring (manufacturing) - Wikipedia

   en.wikipedia.org/wiki/Boring_(manufacturing)

   Boring (manufacturing) A part's-eye view of a boring bar. Hole types: Blind hole (left), through hole (middle), interrupted hole (right). In machining, boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a ...

6. Timken Company - Wikipedia

   en.wikipedia.org/wiki/Timken_Company

   Company history. In 1898, Henry Timken obtained a patent for an improved tapered roller bearing, and in 1899 incorporated as The Timken Roller Bearing Axle Company in St. Louis. In 1901, the company moved to Canton, Ohio, as the automobile industry began to overtake the carriage industry. Timken and his two sons chose this location because of ...

7. Indexing head - Wikipedia

   en.wikipedia.org/wiki/Indexing_head

   Indexing head. Indexing head and tailstock set up on a milling machine's table. An indexing head, also known as a dividing head or spiral head, [1] is a specialized tool that allows a workpiece to be circularly indexed; that is, easily and precisely rotated to preset angles or circular divisions. Indexing heads are usually used on the tables of ...