In article ,
"Steve" writes:

"Roger Mills" wrote in message
...
In an earlier contribution to this discussion,
The Medway Handyman wrote:


If the fixing is sound you won't have a problem. Use large plugs
7mm/8mm drill size and No;10 screws protruding 50mm ish past the
fixing.

Going off at a tangent slightly . . .

Anyone know whether you can get 7.5mm SDS bits? [I've got some plastic
plugs which won't comfortably go into a 7mm hole, but are like a prick in
a shirt-sleeve - and turn with the screw - in an 8mm hole.]
You could use a 7mm bit and 'wiggle' it around a bit to slightly enlarge the
hole. Also I've found debris can prevent plugs going in cleanly, so I
usually vacuum clean the hole after drilling. Or you could replace your
plastic plugs.

Or, to get a smaller cleaner 8mm hole, drill a 6mm one first,
and then widen it out using 7mm and 8mm bits without hammer
action.

I have a 5.5mm SDS, but I suspect that above that, any .5's
are generally lost in the inaccuracy of the hole, resulting
from the way a hammer drill (most particularly SDS) works.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]