Fillet Radius

To ascertain proper mounting of the bearing on the shaft and housing while ensuring maximum surface contact area, the proper fillet radius must be used. Too small and the bearing will not sit flush against the shoulder, too large and we forego precious surface area to reinforce the support. Done right, the optimal surface area is used while avoiding any chance of interference between the fillet and the shaft or housing.

The value of the minimum radius dimensions is defined in the ISO 582 / DIN 620 standard Part 6. The actual values used for our Performance Bearings can be found in the bearing tables.