Hello Paul
Can you see from the drawing (the one that has
written bottom left, the bearings are 60052RS).That the spigot is fastened
to the chassis rail with an 8mm set screw and that if a spanner is placed in the
rebate and turned,then the spigot will turn eccentrically. Which in turn, will
move the bonnet up and down ,back and forth.
Now if you look at the cup (blue in the drawing),
the larger two squares are the top and bottom part of the bearing(60052RS) cut
in half.
The bearing is put in the cup before the cup is
fitted to the wood.
I fitted mine to new wood but if it is a
requirement to use the old wood then the dimensions just need changing to suite
the hole in the wood work.
I did make a cover plate to fit the inside to
finish it off (see photo') but I decided that with the new wood it might look
prettier with just the spigot passing through. So I cut the hole to accept the
cup just 1 1/2 plies short of cutting all the way through.
One photo shows the plastic coated finisher that in
the end I chose not to use.
I hope that I have been of some help.
Best Regards
Jac