In article , Wayne Cook says...

Start with a piece of round stock the size of the hole you're going
into (actually it could be larger and just turned down to that size on
the end). Turn a "hook" on the end by going undersized a little before
the end. Drill a hole through it lengthwise for a the expander. Slit
the hook end in 2 or 4 segments. Make a tapered expander bolt to go in
the hole of the first. When tightened the taper will force the hooks
out to get a grip.

I think snap-on actually sells those bearing extractors like that,
for getting in behind blind races or bearings. But for a one-off
like this, a home-made on works pretty well, I've done this.

The step should have a square edge if there's a bit of room behind
the bearing to hook in - if it's *really* blind then you have to
rely on the chamfer on the bearing OD to give some purchase, in
which case a pointy, 45 degree per side, edge seems to work best.

Jim


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