the hydraulic nut
the hydraulic nut

It is most preferred that the nut body of the hydraulic nut is internally threaded.

As with the prior art hydraulic nuts, the nut body further comprises a fluid passage operatively communicating with the chamber and has a fitting for connection to a fluid source under pressure communicating with the passage.

The protrusion on the piston preferably comprises a pair of opposed lugs defining a slot therebetween. The lugs each have a through bore, the displacement bar has a through bore at one end thereof, the displacement bar is disposed in the slot with the through bores in alignment, and a locking pin is inserted in the bores to secure the displacement bar in place. Those skilled in the art will appreciate that any suitable configuration for mounting the displacement bar could be used. For example, the protrusion could be a single lug with a threaded hole and the displacement bar could have a threaded end or stud to screw into the threaded hole.

In its preferred configuration, the piston could further comprise an inwardly directed annular flange to make better contact with the inner ring of the bearing.

In another configuration, the piston can further comprise an outwardly directed annular flange, wherein the protrusion extends outwardly from the flange.

In cases where an adapter sleeve is used, the hydraulic nut is threaded onto the adapter sleeve which, in turn, is fit onto the shaft which typically is unthreaded.

For removal of a bearing assembly from a shaft, a removal sleeve is inserted between the shaft and the bearing assembly by use of the hydraulic nut and with the bearing held stationary. A hydraulic nut is then screwed onto a threaded end of the removal sleeve to force the removal sleeve off the shaft. To assemble the bearing on the removal sleeve, a hydraulic nut is threaded on the threads of a shaft. The hydraulic nut piston is then pushed against the removal sleeve while the bearing is held stationary. http://www.chinhsing.com/