How to determine bearing shaft and housing fit?
In this situation, your inner ring will rotate, the applied load direction will be constant, and the outer ring is stationary. Let’s get more specific and use the following measurements: the shaft is 20mm with a 6204 ball bearing (0.787402” x 1.85039”) (I.D. x O.D.).
Is there a way to repair a bearing housing?
It might be easier to bore quite a bit larger than the original bore, around the theoretical center, then make and fit a sleeve from material similar to the housing, and pin the sleeve in place, without any chrome at all. Have you got an old,cranky machinist on site with whom to discuss the possible repair options?
What makes a hole in a bearing housing?
This particular case is a housing with an axially free fit, ISO H7. When a hardened bearing spins in a softer cast steel or cast iron housing, it leaves a hole that is slightly larger than the original, and centered on whatever axis around which the bearing had been spinning.
What causes the outer race of a bearing to move?
The problem, in the infrequent cases where it occurs, is slow precession/ rotation of the outer race within the housing bore. It wears thru the cast iron housing and degenerates into a premature machine failure. I’m aware that the floating / fixed system is designed to relieve axial loads between the bearings.
Can a bearing housing be used on a shaft?
I have seen it used on shafts where the bearing has a slight interference. This particular case is a housing with an axially free fit, ISO H7.
Can a slip fit be used on a bearing shaft?
A clearance fit, or slip fit, always enable clearance between the bearing bore and shaft, or outer ring and housing. Installation is generally easy because of the added clearance. If the fit is too loose, you can run into problems where a bearing can creep or spin, either on the shaft or inside the housing, especially when vibration is present.
What should the clearance be between bearing bore and shaft?
For these conditions, we recommend an interference fit between the shaft and bearing bore. The level of interference will increase for heavier loads. When shaft conditions are stationary, and the radial load is constant, a moderate clearance fit between the shaft and bearing bore is an option. Selecting the Proper Housing Fit
How to determine bearing shaft and housing fit-Baart group?
Let’s get more specific and use the following measurements: the shaft is 20mm with a 6204 ball bearing (0.787402” x 1.85039”)(I.D. x O.D.). In this circumstance, you’ll need an interference fit on the shaft because the inner ring is the one rotating.