"Lurch" wrote in message
...
On Thu, 19 Feb 2004 19:21:09 GMT, "MrCheerful"
wrote:


"David Hearn" wrote in message
...
The manual says not to use the standard 13mm chuck with the SDS drill
when
in hammer mode. What is the actual problem with doing this? A
standard
chuck can cope with basic hammer drills - is it the heavier force from
the
SDS drill that could be a problem?

Its just that I need to make a large hole through a wall for pipework
and
have a 40cm x 20mm standard masonry drill bit but only a short 6" x
22mm
SDS
drill bit. Just wondering whether I can make use of the longer non-SDS
drill bit in hammer mode in the standard chuck. What's the worst that
can
happen?

Thanks

David



The way the chuck locks into the sds hole does not allow any fore and aft
movement, therefore the little hammer inside will smashing against an
immovable object and will get damaged.

I think you're mistaken there.

Well , that is how my wickes sds drill and chuck design is, so I assume
others are similar. The chuck adaptor which fits into the sds slot has only
one depression in the side, this effectively locks the adaptor solidly into
the sds chuck of the drill and allows no fore and aft movement (unlike a
drill bit, which can float )

HTH

MrCheerful

Drill the hole with a small bit all the way through then use a larger bit
from each side , with hammer off if you use the grippy chuck.

That sounds more thought out. I'd agree with that bit.
..

SJW
A.C.S. Ltd.