There are various possibilities for fastening a V pulley, tooth belt pulley or chain wheel to a shaft. This can be done with a bore, key way and tapped hole, but also with a clamping sleeve. In this case, a sleeve is clamped between the shaft and hub (plate) with a prescribed tightening moment and this ensures a play-free connection with high concentricity. The major advantages of clamping sleeves are that assembly and disassembly are very simple and that no axial misalignments occur during fastening. Both cylindrical and conical clamping sleeves are available.
Conical clamping sleeves (also known as a taper bus, taper bush or taper lock) are used in combination with the corresponding taper bus/tooth belt pulleys, chain wheels or V pulleys available as standard. As standard, these plates already have a conical bore with tapped holes for fastening sleeves to the shaft. The taper buses are available in a variety of bore diameters with key way in both metric and inch sizes and are supplied with the corresponding (Allen) bolts.
Cylindrical clamping sleeves, also known as locking elements or clamping bushes, consist of a conical inner and outer ring with clamping bolts. So where does the name cylindrical come from? This is because these clamping sleeves are mounted in a cylindrical bore. When tightening the clamping bolts, the outer ring is pulled onto the inner ring, thus creating the connection between the plate and shaft. A cylindrical clamping sleeve is often used if power transmission needs to be achieved without using a key way.
The comprehensive range of clamping sleeves provides a suitable sleeve for every application. The choice of clamping sleeve primarily depends whether a low or high torque needs to be transferred, but also whether the clamping sleeve needs to be centring or not self-centring. A clamping sleeve also provides a solution with applications where there are small diameters but a high torque needs to be transferred.
With some types of clamping sleeve, there is (minimal) axial displacement in relation to the shaft position during tightening of the bolts, however, there are also sleeves available where this does not occur.
Clamping sleeves are made of grey cast iron or steel as standard, but if the environmental conditions require, it is of course also possible to obtain these in other materials such as stainless steel. It is also possible to nickel plate clamping sleeves or apply another surface treatment. This option is often preferred if the clamping sleeve needs to be resistant to moisture, rust formation or other (aggressive) conditions.
Wherever drive plates are used, clamping sleeves can also be applied. In principle, we come across clamping sleeves in every industry, from (Petro)chemistry to Food and Pharmaceuticals, from Machine Construction to Maritime, but also for example in Agriculture, Forestry and Fisheries.
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