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More Rules of thumb-Design

Bearing clearances differ by type of bearing and application. See our chart "Clearances Chart" on the next page. APS can work with you to suggest proper clearances.

 

Pressure fed oil provides more cooling than the slinger ring method of lubrication.

 

Temperature rise of the oil as it goes through the bearing is a prime consideration in controlling operating temperatures.

 

Water cooled housings provide lower operating temperatures than air cooled housings for cooling bearings. These are typically high heat fan bearings

 

Elliptical bore bearings provide more cooling by oil circulation and give more stability than round bore bearings.

 

Shaft deflection should be considered in determining clearance needed.

 

In general, bearing loading will be between 75 PSI and 250 PSI

 

When designing with the slinger ring method of lubrication, oil viscosity and shaft speed are major considerations for lubricating and cooling.

 

For electrically insulated bearings,  some type of "Double Housing" with insulation between housing, or insulation on the outside diameter is usually required. APS can test for isolation when the bearing arrives for repair and re-insulate as necessary.

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