Couplings take big shocks and cure vibration

Whenever vibration and shock loading becomes a problem on arduous, heavy-duty applications, Renold Hi-Tec's PM range rubber-in-compression couplings are able to provide the necessary protection to plant and equipment. Severe shock loading and excessive vibration will result in premature wear of component parts, damage to the machinery being driven and even catastrophic failure in the worst cases.

Rubber-in-compression couplings are made up of two round metal sections with what looks like the paddles of a paddle steamer projecting inwards from the outer section and outwards from the inner. Rubber blocks are placed in the spaces in-between the paddles, and, as the outer section is turned by the engine, the inner section is driven through the rubber blocks. As this happens the rubber is compressed and hence the term, 'rubber-in-compression.' The couplings are also failsafe because even if the rubber blocks failed the strong metal paddles would come together and continue to drive the machinery.

The PM range of couplings is specifically designed for the most arduous applications and provides protection against severe shock loads and vibration. Renold Hi-Tec's engineers are able to eliminate problems with vibration by firstly measuring the levels of vibration in the application and then carefully selecting the correct PM coupling and the formulation of rubber used to form the rubber blocks. The PM range of couplings is ideally suited to applications such as mining and quarrying, metal manufacture, mineral processing, pumps and general heavy-duty industrial applications for torques up to 6,000KNm.

An additional benefit to specifying rubber-in-compression couplings is that they are maintenance free and do not require lubrication or adjustment of any kind, which means they provide the lowest lifetime cost on all applications. The only serviceable item is the rubber blocks, which in most cases are good for over 10 years of service.