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EXPERTS IN BEARINGS SOLUTIONS |  Made in Austria 

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CLUB BIKONE

CLEARANCE and STIFFNESS

Bearing preload

On most bottom bracket shafts, the bearings are selected and mounted in such a way that they retain some clearance during operation. But when the performance has to be pushed to the limit, the bearings have to be manufactured and assembled with a controlled clearance, close to zero, which assures us that we use all their rolling elements.

 

Rolling element bearings, compared to plain bearings, have the following advantages:
– less torque, energy conservation
– greater availability of different types and sizes, globally and standardized
– many capable of taking combined radial and axial loads
– greater load carrying capabilities within limited design space
– maintenance free, sealed “for-life” design arrangements
– less lubrication consumption
– very precise guidance of shafts
– rolling element bearings are more suitable to greater operating temperatures

MORE ENERGY TO RIDE

Bottom bracket with axial clearance without defining or controlling

PowerSet Hub with controlled axial clearance thanks to the central spacer

The term clearance in a bearing is defined as the distance that its components can move relative to each other.
Depending on the type of bearing, the internal clearance of the bearing can be defined in two variants, radial and axial, depending on its direction with respect to the axis.
In Bikone’s Asymetric PreSet Hubs we use the double row angular contact bearing configuration, with greater precision than the rest of the design, although it requires strict control of the axial clearance to optimize the distribution of the contact pressure according to your power or weight. The axial clearance is measured in microns of millimeter and only with the best technology in automatic processes can it be controlled. Improper configuration can result in overpressure, increased temperature and premature bearing failure.