SKF supplies lock nuts in a wide range of sizes; they are also referred to as shaft or withdrawal nuts, depending on their use. They are used to locate bearings and other components onto a shaft as well as to facilitate mounting bearings on tapered journals and dismounting bearings from withdrawal sleeves. SKF lock nuts offer five different ways of locking on the shaft, as described below.
Locking washerLocking washers are simple, stable and reliable fastening elements. The washer engages a keyway in the shaft and locks the nut in position if one of the tabs is bent over into one of the slots around the circumference of the nuts. Locking washers are used with lock nuts in the KM and KML series as well as for the lock nuts with inch dimensions in the N and AN series (fig 1).
Locking clip or plateLocking clips are attached to the nut using a bolt to engage a slot in the nut and a keyway in the shaft. Locking clips are used with lock nuts in the HM 30 and 31 series (fig 2).
Locking plates are attached to the nut using two bolts to engage in a keyway in the shaft. Locking plates are used with lock nuts with inch dimensions in the N 0(00) series (fig 3).