Fixed vs Floating Bearing
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Bearing instructions
Transcript of Fixed vs Floating Bearing
1. The floating bearing is required to allow thermal growth of the shaft when it pushes the bearing inside the pillowblock against the fixed bearing assembly.
As previously stated, the reducer and motor end are usually the fixed bearing end.
If you have a single brake disk, it should be on the fixed bearing side.
Manufacturers supply, as standard equipment, floating bearing housings. To make them fixed, internal shims are applied against the bearing outer race. The gap is usually sufficient for most swings in thermal conditions, but not all.
The thermal growth is a product of both temperature operating extremes and the distance between bearing centers.
The rule of where to apply the fixed bearing unit is common engineering sense. Look to see the cause and effect of the thermal growth.Lawrence NordellConveyor Dynamics, Inc.
website, email & phone contacts:[email protected]: USA 360-671-2200fax: USA 360-671-8450Reply With Quote2. 3. 5th September 2006,9:21#5
Lawrence K. NordellPresident and CEOConveyor DynamicsInc.[eDir]
Professional Experience56 Years / 1 MonthDiscussions2554,Articles0,Publications0Searchingnothing specifiedKnow-HowDesign(1395), Pipe Conveyor(213), Bins(94)Sorry, I omitted an important point. When the bearings are installed, the time of year or operating environment must be considered when positioning the floating bearing gap between the pillowblock housing and the outer bearing race. Any good installer will know how to make this setup that eliminates the bearings pushing a thermal thrust load against each other.Lawrence NordellConveyor Dynamics, Inc.
website, email & phone contacts:[email protected]: USA 360-671-2200fax: USA 360-671-8450
