Thermal expansion of the shaft, Axial displacement

The locating ring can be removed from a bearing block of a pair placed opposite each other so that bearing axial displacement is possible.

Allow for thermal expansion and contraction

There is a total clearance available for thermal expansion that is equal to the thickness of the location ring. The expansion and contraction of material must be considered in order to maintain the clearance that is required to operate the bearing well. In the diagram, the clearance for contraction by cooling is indicated by C and the clearance for expansion by heating is indicated by B. The table shows the maximum values for C and B depending on the diameter of the shaft.

Extra room for more axial displacement

It is possible that the standard option in our Extreme bearings is not sufficient, because your construction has very long shafts, large temperature difference or other causes. in this case we supply an extra extension ring that fits between the bearing unit and the cap.

Linear displacement through the bearing unit

A situation can arise where extreme axial displacement is required or a linear movement is required through the bearing unit. For this situation you can choose an Extreme Bearing with a Cylindiche bore without a locking adapter

Calculate the maximum shaft length depending on the temperature in your application. In case you need to mount a long shaft, it is necessary to calculate the thermal expansion or contraction and adjust the bearing position to take this into account. As an example, a stainless steel shaft of 1 metre will become 0.023 mm longer when the temperature rises by 1°C and a carbon steel shaft of 1 metre will become 0.016 mm longer when the temperature rises by 1°C. The table shows the maximum shaft length depending on how the temperature changes during operation after the time of installation.