Bearings’ excessive housing interference fit and undersized housing seat diameter
What to considerate during design?
- An interference fit between the bearing outer ring and housing seat may be required, but will compress the outer ring and reduce the bearing internal clearance.
- If the fit is too tight, it may result in too little operating clearance in the bearing or even preload. This will lead to a hot running bearing.
What to do?
- Check that the installed bearing has the correct internal clearance.
- If the housing is new or refurbished, carefully check the bearing seat dimensions for both dimensional and form accuracy. Regrind the housing seat to the appropriate fit. If this is not possible, use a bearing with a larger internal clearance.
- Note that an interference fit on the shaft and in the housing will probably result in too little operating clearance.
- Note that for a rotating inner ring load, an interference fit in the housing will cause the "floating" bearing to become fixed, inducing an axial load and excessive heat.