A radial bearing with radial clearance so that the outer ring can move freely axially. Another method is to use a radial bearing with a small radial clearance when mounted on the bearing housing so that the outer ring can move freely axially.
1. Lock nut positioning method
When the bearing inner ring is fitted with an interference fit, the inner ring side is usually placed against the shoulder on the shaft. The other side is usually fixed with a lock nut (KMT or KMTA series)
2. Spacer positioning method
Between the bearing rings, or between the bearing ring and the adjacent parts, a spacer bush or spacer ring. It is convenient to replace the overall shoulder or bearing shoulder. In these cases, dimensional and shape tolerances also apply to related parts.
3. Stepped sleeve positioning
Another method of axial positioning of the bearing uses a stepped bushing. These bushings are especially suitable for precision bearing configurations. It has a smaller jitter and provides higher accuracy than a threaded lock nut. Stepped bushings are often used for ultra-high-speed spindles, for which conventional locking devices cannot provide sufficient accuracy.
4. Fixed end cap positioning method
When the bearing is fitted with an interference fit, the outer ring of the bearing is installed. Usually one side of the outer ring is placed against the shoulder on the bearing housing, and the other side is fixed with a fixed end cover.
Fixed end caps and their fixing screws have a negative impact on bearing shape and performance in some cases. If the wall thickness between the bearing housing and the screw hole is too small, or the screw is tightened too tight, the outer ring raceway may be deformed. The lightest ISO size series 19 series is more susceptible to such damage than the 10 series or higher series.
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