"tony sayer" wrote in message
...
In article , Another Dave
scribeth thus
On 25/09/2010 15:59, js.b1 wrote:
Tsk, remember the last discussion :-)

Cast iron is strong in compression - but weak in tension.

Angle grind if possible a horizontal slot in the side higher up,
and a
slot in the bottom.
Alternatively scratch the enamel away (pointed cold chisel), then
drill with something like a HSS-G or whatever is good on cast
iron.
Hit the bottom so as to create a tension load so the slots can no
propogate into cracks.

Frankly I am not sure a club hammer is the best thing, I think
one of
those hexagonal road bars is probably better because it has both
small
area, fantastic kinetic energy, long duration impulse rather than
"bounce off". You would need a short one unless you want to
simultaneously do the ceiling at the same time.

You are undoubtedly correct (I did Metallurgy at Sheffield
University
back in the early sixties) :-(

However I did not have:

a. An angle grinder
b. A pointed cold chisel
c. An HSS-G drill
d. A hexagonal road bar

I did have a friend with a club hammer so that's what I went with.

Who says a university education is wasted?

Another Dave


Simple!, Just wait till paddy is digging the road up again and slip
him
a few quid and a gallon of the black stuff, and I'm sure you'd get a
road drill in most bathrooms...


--
Tony Sayer




I'd lend the o/p (my big bruvver) a road drill if he so desires, but
it's almost a heavy to get up the stairs as the bath is to come down
!!!!

AWEM