Rolling bearings are one of the bare essentials when it comes to machine components. Every day, they are produced and used in their millions in the usual diameter ranges. Despite the high unit costs they are very precise, with tolerances in the order of a few thousandths of a millimetre.
Plain Bearings and Spherical Plain Bearings
Unlike the other bearings described here, plain bearings and spherical plain bearings have no rolling elements (balls or rollers) for transmitting force. During operation, there is therefore dynamic friction instead of rolling friction as with roller bearings. It follows that very high forces can be transmitted at slow speeds, e.g. with pivoting movements. Exceptions are hydrodynamic or hydrostatic bearings, which will not be covered here.
Rolling Bearing Accessories - clamping sleeves and bearing housing
It is well known that good results depend not only on having good tools, but on having the right tools. Alongside lubrication failure, incorrect mounting is one of the most common causes of damage to bearings. This will mean that bearings will not last as long as planned and will often not deliver the desired level of performance or will only partially deliver it: high running noise, vibration of shaft and housing and overheating are some of the results that follow, resulting in operational malfunctions and production stoppages.