A multi-layer interference fit can be defined for both, inner and outer rings. For the inner ring fit the layers needs to be ordered from large to small diameter and for the outer ring contact from small to large diameter. The first layer is always in contact with the bearing ring.
If the bearing calculation is used from the shaft calculation, note that the diameters and materials are not coupled to the information within the shaft calculation. All layers for each ring have the same temperature.
