Patented in 1923, the self-locking collar remains Timken’s most popular locking system to facilitate mounting of wide inner-ring bearings. The self-locking collar eliminates the need for locknuts, washers, shoulders, sleeves and adapters.

With various seal and inner width variations for many agriculture and industrial applications, self-locking collars are the easiest housed unit to install.

The locking collar has a counterbored recess made purposely eccentric to the collar bore. When assembled on the shaft, this eccentric recess engages, or mates, with an eccentric cam end of a bearing’s inner ring. The collar is engaged on the inner cam of the bearing. This assembly grips the shaft tightly with a positive binding action that increases with use. No adjustments of any kind are necessary. The collar setscrew provides supplementary locking.

Design Attributes

Unit inserts offer extended width, allowing them to be installed wher space might be a constraint.

Rubber-bonded seal has an outboard shroud to protect the seal.

Bearing inner ring has a special profile to resist seal-lip inversion.

Applications

Conveyors

Packaging

General industrial equipment

Fans and blowers

Construction equipment

Food and beverage