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The centre of a shaft is not toothed, as this would add little torque capacity to the coupling and the increasingly narrow teeth would become impractical to cut. For instance, a shaft of 60 mm diameter can be toothed in a 12 mm wide ring only (inner diameter is 36 mm) without jeopardizing the load-bearing capacity of the shaft.
A common type of this style fitting is a "hex bushing" with a hex head for installation with a pipe wrench. A double-tapped bushing is more compact than a reducer but not as flexible. While a double-tapped bushing has a more minor female thread concentric to a larger male thread (and thus couples a smaller male end to a larger female), a ...
Pneumatic tool attached using a coupling. A coupled pair consists of a male nipple or plug and a female coupler or socket. One side is connected to a flexible supply hose; the other may be attached to a manifold, valve, tool, or another hose. A female coupler is used on the supply side, and a male nipple is used on the receiving side.
Spline drives were specified for 5, 6.3, 8, 10, 12, 14, 16, and 20 mm size screws. [84] Its primary advantage is its ability to resist cam-out , so it is used in high-torque applications, such as tamper-proof lug nuts , cylinder head bolts, and other engine bolts.
For example, AN6 bolt has a 3 ⁄ 8-24 thread [3] whereas an -6 AN fitting has a 9 ⁄ 16-18 thread. [ 4 ] Originally parts were made compliant to the specification MIL-F-5509, but they are now controlled under SAE AS (Aerospace Standards) specifications AS4841 through AS4843 and AS4875.
A Schmidt coupling is a type of coupling designed to accommodate large radial displacement between two shafts. Consisting of an arrangement of links and discs—three discs rotating in unison, interconnected in series by three or more links between each pair of discs—a Schmidt coupling can adapt to very wide variations in radial displacement while running under load.
A "cat's paw" is a simple, relatively inexpensive, limited-capability version of an independent-jaw chuck. It typically consists of a ring of metal with screw threads tapped radially into it, in which screws (hex cap, socket hex cap, or set screws) serve as independent jaws. Cat's paws can serve various purposes:
A coupling nut A coupling nut and its orthographic view. A coupling nut, also known as extension nut, is a threaded fastener for joining two male threads, most commonly a threaded rod, [1] [2] but also pipes. [3] The outside of the fastener is usually hexagonal so a wrench can hold it.