Thermal expansion of the shaft, Axial displacement

Extreme Bearing is made to adapt thermal expansion of the shaft

The seats of an Extreme Bearing are machined to a tolerance in order to provide a loose fit. The bearing seats in the housings are sufficiently wide to allow the bearing axial displacement and likewise to accommodate for thermal expansion of the shaft due to high temperatures.

Room for axial displacement

Suitable for expansion and contraction of the shaft

Fixed and floating bearing location

Extreme Bearing units are suitable for fixed and floating bearing location

Shaft Ø	C, Max. Cooling shrinkage mm	B, Max. Heating expansion mm
20	3,5	3,5
25	3,5	3,5
30	3,5	3,5
35	3,5	3,5
40	3,5	3,5
45	4	4
50	4	4
55	4	4
60	4	4
70	5	5
80	5	5
100	10	10

Size	V
20	8.5
25	8.5
30	8.5
35	8.5
40	8.5
45	11
50	11
55	11
60	11
65	13
70	13
75	13
80	18
85	18
90	20
100	20

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.