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2. Drill bit shank - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_shank

   A range of sleeves may be used to bring the size of the smaller Morse tapers up to the size of the drive spindle's larger taper. Sockets are also available to extend the effective length of the drill as well as offering a variety of taper combinations. The detail image shows a Morse taper shank on a 16 mm diameter drill bit.

3. Machine taper - Wikipedia

   en.wikipedia.org/wiki/Machine_taper

   The rate of taper is 1:20 on diameter, in other words 0.600" on diameter per foot, .050" on diameter per inch. Tapers range from a Number 2 to a Number 20. The diameter of the big end in inches is always the taper size divided by 8, the small end is always the taper size divided by 10 and the length is the taper size divided by 2.

4. Collet - Wikipedia

   en.wikipedia.org/wiki/Collet

   A W-type external-thread collet (red) being pulled into its spindle seat (green) with a drawbar (blue), clamping, rotating and then releasing a shaft. A collet / ˈ k ɒ l ɪ t / is a segmented sleeve, band or collar. [1] [2] One of the two radial surfaces of a collet is usually tapered (i.e a truncated cone) and the other is cylindrical.

5. Shaft (mechanical engineering) - Wikipedia

   en.wikipedia.org/wiki/Shaft_(mechanical_engineering)

   The following stresses are induced in the shafts. Shear stresses due to the transmission of torque (due to torsional load). Bending stresses (tensile or compressive) due to the forces acting upon the machine elements like gears and pulleys as well as the self weight of the shaft. Stresses due to combined torsional and bending loads.

6. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   The fitting is known as a reducing coupling, reducer, or adapter if their sizes differ. There are two types of collars: "regular" and "slip". There are two types of collars: "regular" and "slip". A regular coupling has a small ridge or stops internally to prevent the over-insertion of a pipe and, thus, under-insertion of the other pipe segment ...

7. Stuffing box - Wikipedia

   en.wikipedia.org/wiki/Stuffing_box

   A small boat stuffing box comprising an adjusting nut, a locking nut and a sleeve. On a boat having an inboard motor that turns a shaft attached to an external propeller, the shaft passes through a stuffing box, also called a "packing box" or "stern gland" in this application. The stuffing box prevents water from entering the boat's hull.