1. Lock nut positioning method:
When the inner ring of a bearing with an interference fit is installed, one side of the inner ring is usually placed against the shoulder on the shaft, and the other side is generally fixed with a lock nut. Bearings with tapered bores are mounted directly on the tapered journal and are usually secured to the shaft with a lock nut.
2. Spacer positioning method:
It is convenient to use spacers or spacers between bearing rings or between bearing rings and adjacent parts instead of integral shaft shoulders or bearing housing shoulders. In these cases, dimensional and form tolerances also apply to the related parts.
3. Positioning of ladder sleeve:
Another method of axially positioning bearings is to use stepped bushings. These bushings are particularly suitable for precision bearing configurations, offering less runout and greater accuracy than threaded lock nuts. Stepped bushings are often used in ultra-high-speed spindles for which conventional locking devices cannot provide sufficient accuracy.
4. Fixed end cover positioning method:
When the outer ring of a bearing with an interference fit is installed, one side of the outer ring is usually placed against the shoulder on the bearing seat, and the other side is fixed with a fixed end cap. Fixed end caps and their set screws can in some cases have a negative impact on bearing shape and performance. If the wall thickness between the bearing seat and the screw hole is too small, or the screws are tightened too tightly, the outer ring raceway may be deformed. The lightest ISO size series, the 19 Series, are more susceptible to this type of damage than the 10 Series or heavier series.