"Pete Zahut" wrote in message
...
I've got a couple of wall lights for use in the bedroom. They're actually
meant to be permanently wired but I need to add flex to them so that I can
plug them into a standard 13A socket. There's a picture here
http://www.thelightingsuperstore.co....roductid=44427 and,
although these are not the actual fittings I've got, this illustrates the
problem very well.

The bottom of the fitting is curved and I need to drill a hole to take a
rubber grommet that will then allow an entry for some black 3-core 0.5mm
flex. I've never tried to drill on a curve before - any particular
techniques to it?


I did very similar once. I found it easier to drill from the inside out.
It meant the drill going into the hole at a slight angle but I placed a bit
of scrap metal between the drill tip and inner face to prevent it moving
forward and started with a small drill. Once the hole was started this
piece of scrap was removed. The curve had no effect because the drill
would have had to climb up. Any imperfections in the shape of the hole were
hidden by the grommet. Of course you might have to remove the switch
temporarily to make space to work.
--
Tinkerer