A bearing puller or bearing removal tool is a tool used to remove bearing from a rotating machine shaft or from a blind bearing hole. The most common use is removing a caged set of ball or bearings from a rotating machine shaft. These bearing removal tools are made of tool grade steel, so bearing removal tools are harder than the parts they are used on. Bearing removal tools are usually hand-powered with a handle provided on the turn screw. Some of the bearing pullers are hydraulically powered, using a hydraulically powered piston to press against the end of the machine shaft the bearing is out.
There are also small-sized versions of bearing pullers or bearing removal tools are available to remove small millimetre bearings in small fractional horsepower motors and fishing reels and other small machine components. There are two or three arms with extensions that allow the user to pull in the inner race as well. It is preferable to drive from the inner race since it is firmly set on the shaft of bearing to be pulled, while the outer race is not very well secured to the rest of the bearing parts assembly.
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