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Male threaded Heim Joint (A) the casing (B) the ball swivel (C) the opening for attaching hardware (D) the threaded shaft. A rod end bearing, also known as a heim joint (N. America) or rose joint (U.K. and elsewhere), is a mechanical articulating joint.
Ball joints allow a limited range of smooth movement in all directions Ball Joint Animation. A ball joint is used for allowing free rotation in two planes at the same time while preventing translation in any direction, [1] including rotating in those planes. Combining two such joints with control arms enables motion in all three planes ...
U.S. Patent No 8771 drawing image Patent 8771 image close-up of parts Shaker ladder chair with ball swivels on rear legs for tilting. The Shaker tilting chair – named for its ball bearing or ball and socket [A] button mechanism assembled to the back two legs of a wooden chair – allowed a person to lean back in the chair without slipping or scraping the floor.
Rather than using separate pivots for both the up-and-down motion of the suspension and the steering swivel, the use of a spherical ball joint that could move in two degrees of freedom allowed the same joint to carry out both functions. The hub carrier extended vertically to span the ends of both wishbones, with a ball joint at each end.
In newer designs, a ball joint at each end allows for all movement. Attached to the knuckle at its center is a bearing hub, or in many older designs, a spindle to which the wheel bearings are mounted. To resist fore-aft loads such as acceleration and braking, the arms require two bushings or ball joints at the body.
The biggest concern about anchor swivels is that they might introduce a weak link to the rode. With most swivels the shaft is nice and tidily embedded in the other half of the swivel as in the example of the stainless steel anchor swivel shown here. When used in marine applications, and worse in tropical climates, this is a cause for corrosion ...
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