Enter the frictional power loss (W), the heat dissipation per degree above ambient temperature (W/C), and the ambient temperature (C) into the Bearing Temperature Calculator. The calculator will evaluate the Bearing Temperature. 

Bearing Temperature Formula

The following formula is used to calculate the Bearing Temperature. 

BT = (FL / HD) + Tamb

Variables:

  • BT is the Bearing Temperature (C)
  • FL is the frictional power loss (W) 
  • HD is the heat dissipation per degree above ambient temperature (W/C) 
  • Tamb is the ambient temperature (C) 

How to Calculate Bearing Temperature?

The following steps outline how to calculate the Bearing Temperature.


  1. First, determine the frictional power loss (W).
  2. Next, determine the heat dissipation per degree above ambient temperature (W/C). 
  3. Next, determine the ambient temperature (C). 
  4. Next, gather the formula from above = BT = (FL / HD) + Tamb.
  5. Finally, calculate the Bearing Temperature.
  6. After inserting the variables and calculating the result, check your answer with the calculator above. 

Example Problem:

Use the following variables as an example problem to test your knowledge.

frictional power loss (W) = 500

heat dissipation per degree above ambient temperature (W/C) = 60

ambient temperature (C) = 25

BT = (FL / HD) + Tamb =  ?