The table below shows dimensions for adapter assemblies and components used in the mounting of tapered bore bearings on shafts.SNW assembly consists of a sleeve, locknut and lockwasher.SNP assembly consists of a sleeve, locknut and lockplate.

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:a locking device that engages a keyway in the shaft or key slot in the adapter sleeve,or a locking mechanism integrated in the nut.

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.