Both Martin Flex and Fenner Flex tyre couplings come with the convenience of Taper Bush mounting for fixing to the shaft. This allows the tyre coupling hub to be mounted against the bearing on a shaft, which will reduce overhung loads. Or the Taper Lock Bush is able to enter the hub from outside the coupling H Flange , which, in some applications, may assist with ease of installation. Please see pictorial configurations below. A feature offered by the Martin-Flex and Fenner Flex tyre couplings, which are not commonly available from other manufacturers, is the addition of a spacer unit accommodating for standard distances between shaft ends DBSE. For further details, please refer to Figure 1 below.
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Main article: Magnetic coupling A magnetic coupling uses magnetic forces to transmit the power from one shaft to another without any contact. This allows for full medium separation. Therefore can provide the ability to hermetically separate two areas whilst continuing to transmit mechanical power from one to the other making these couplings ideal for applications where prevention of cross contamination is essential.
Oldham[ edit ] Animated Oldham coupler An Oldham coupling has three discs, one coupled to the input, one coupled to the output, and a middle disc that is joined to the first two by tongue and groove. The tongue and groove on one side is perpendicular to the tongue and groove on the other.
The middle disc rotates around its center at the same speed as the input and output shafts. Its center traces a circular orbit, twice per rotation, around the midpoint between input and output shafts. Often springs are used to reduce backlash of the mechanism. An advantage to this type of coupling, as compared to two universal joints, is its compact size. The coupler is named for John Oldham who invented it in Ireland , in , to solve a problem in a paddle steamer design.
Oldham coupler, assembled Oldham coupler, disassembled Sleeve, box, or muff coupling[ edit ] A sleeve coupling consists of a pipe whose bore is finished to the required tolerance based on the shaft size. Based on the usage of the coupling a keyway is made in the bore in order to transmit the torque by means of the key.
Two threaded holes are provided in order to lock the coupling in position. Sleeve couplings are also known as box Couplings. In this case shaft ends are coupled together and abutted against each other which are enveloped by muff or sleeve.
A gib head sunk keys hold the two shafts and sleeve together this is the simplest type of the coupling It is made from the cast iron and very simple to design and manufacture. It consists of a hollow pipe whose inner diameter is same as diameter of the shafts.
The hollow pipe is fitted over a two or more ends of the shafts with the help of the taper sunk key. A key and sleeve are useful to transmit power from one shaft to another shaft. Tapered shaft lock[ edit ] A tapered lock is a form of keyless shaft locking device  that does not require any material to be removed from the shaft.
The basic idea is similar to a clamp coupling but the moment of rotation is closer to the center of the shaft. Requires no lubrication to consistently run as it has no internal components. When used on a drive train they are sometimes known as giubos.
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