I'm referring to this bulkhead fitting:
I ordered 4 of these recently. Nice fitting. However the knockouts
don't seem to be knockouts at all - they are slightly recessed areas
in the case which even a stiff blow with something sharp or a small
ball pein hammer won't shift.
I suppose having tried the brute force technique I ought to give
ignorance a try.
Anyone had problems with knockouts?
I found the same with the Screwfix ones I ordered.
In the end I used a sheet metal punch - the type where you drill a 10mm
hole and then assemble the punch and coller through the hole before
tightening the punch into the coller. Worked fine (after I worked out I
had assembled the coller the wrong way round and the side I was using
was intended for the next punch down in the size range - thought it was
bl**dy stiff to turn!)
3/4" or 20mm. If you think you'll do a lot of this sort of thing, get a
Q-Max punch which produces a perfect hole, rather than a hole saw, and
costs less than a complete single size hole saw. The disadvantage is you
need access to both sides of the job.
*Everybody lies, but it doesn't matter since nobody listens.
Dave Plowman firstname.lastname@example.org London SW 12
I've had 2 of these lamps, only in black from local factors, and found the
same problem. The plastic/polycarbonate seemed to be quite brittle so I
didnt get rough with the hammer / punch / swrewdriver, so took a 20mm hole
cutter to it which worked a treat.
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