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2. Lockring - Wikipedia

   en.wikipedia.org/wiki/Lockring

   A lock ring is a threaded washer used to prevent components from becoming loose during rotation. [1] They are found on an adjustable bottom bracket and a track hub of a bicycle . Lokring is another form of fastener used in the automotive and air condition industries: these fittings are often confused with lockrings.

3. Harbor Freight Tools - Wikipedia

   en.wikipedia.org/wiki/Harbor_Freight_Tools

   Harbor Freight Tools won a declassification of the class action; that is, the court found that all the individual situations were not similar enough to be judged as a single class, and that their claims would require an individual-by-individual inquiry, so the case could not be handled on a class basis.

4. Bottom bracket - Wikipedia

   en.wikipedia.org/wiki/Bottom_bracket

   The plug is machined to accept a typical bottom bracket, but offset from the center of the plug, so that by rotating the plug, the location of the bottom bracket (and hence the chain tension) may be adjusted (fore and aft to tension the chain, the upper or lower eccentric position for a given chain length can be chosen to fine tune bottom ...

5. List of railroad truck parts - Wikipedia

   en.wikipedia.org/wiki/List_of_railroad_truck_parts

   An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.

6. Tap and die - Wikipedia

   en.wikipedia.org/wiki/Tap_and_die

   Taps and dies are tools used to create screw threads, which is called threading. Many are cutting tools; others are forming tools. A tap is used to cut or form the female portion of the mating pair (e.g. a nut). A die is used to cut or form the male portion of the mating pair (e.g. a bolt).

7. Bottom hole assembly - Wikipedia

   en.wikipedia.org/wiki/Bottom_hole_assembly

   A bottom hole assembly (BHA) is a component of a drilling rig. It is the lowest part of the drill string , extending from the bit to the drill pipe . The assembly can consist of drill collars, subs such as stabilisers, reamers, shocks, hole-openers, and the bit sub and bit.