Bearing Taper Sleeve Removal Tool

[nova_robotics]

I can't picture this oil injection tapered thing, and reading the documentation is no help whatsoever. Is there a video that explains these?

I grok the concept of using oil pressure to expand the bearing for removal or installation; I just don't understand how they are doing it.

This particular one is F. A. G. (not sure if the filter will catch that). There are some drilled passages in the taper itself. You inject oil into the small side of the taper, which is then forced between the taper and shaft to hydraulically float it and break the friction fit against the shaft surface. They usually let go with a bang. For some unknown reason (possibly to force you to buy their special tool) the oil is injected on the SMALL side of the taper, which makes it essentially impossible to get anything in there. They COULD have drilled the hole on the thick side of the taper where it would still be extremely tight but you'd at least have a better chance of getting a fitting in there.

Their tool is stupid, it's basically just a small length of steel tubing, maybe 4" in length, which is M6 threaded at one end (so it can thread into the taper) and some sort of more conventional hydraulic fitting on the other end. You thread it in, bend it up a bit and attach a Portapower or whatever to release the taper. Their tool still won't fit in most situations, including this one. It's just a hateful design all around.