Lock nuts are used to locate bearings onto a shaft. Additionally, they can be used to mount bearings with a tapered bore onto tapered shaft seats and adapter sleeves, and to dismount bearings from withdrawal sleeves. Lock nuts are also frequently used to secure gears, belt pulleys and other machine components.
Lock nuts have to be secured to prevent unintentional loosening by:
SKF lock nuts provide a variety of ways to secure the nut onto a shaft. The lock nuts listed here constitute the basic SKF assortment. Lock nuts with other locking methods can be supplied on request. For additional information, contact SKF.
SKF industrial lock nuts (table 1)
SKF precision lock nuts (table 2)
Lock nuts with integral locking reduce the cost of the shaft as no keyway is required. Installation is quicker and easier because no separate locking device is necessary. However, the loosening torque of these lock nuts requires more attention. For information on loosening torque, refer to the product data sections for the various lock nut series.
Easy to install, the locking principles used to engage a keyway in a shaft or adapter sleeve thread involve simple, stable and reliable fastening elements – a lock washer, locking clips or locking plates.
Friction is sufficient to lock the nut in place, and because no separate locking device is necessary, installation is quicker and easier, plus the cost of the shaft is reduced as no keyway is required.
