Bearing Puller
A mechanical or hydraulic tool designed to safely pull bearings, gears, or pulleys off of shafts.
A bearing puller is a mechanical or hydraulic tool used to remove press-fit components, such as bearings, gears, bushings, or pulleys, from a shaft or housing without damaging the parts. It typically consists of a central forcing screw and two or three adjustable arms (jaws) that grab the outer or inner edge of the component.
As the forcing screw is tightened against the end of the shaft, it draws the jaws back, pulling the bearing smoothly off the shaft. Pullers are designed in various styles: jaw pullers for outer grips, blind hole pullers for bearings recessed in housings, and bearing splitters (which use semi-circular wedges to slide behind bearings with tight clearances).
Using a bearing puller prevents the damage that occurs when attempting to pry or hammer bearings off of shafts. It is widely used in servicing alternator pulleys, wheel bearings, differential pinion bearings, and transmission gears, where precise, controlled pulling force is required.