On 3 Jul 2003 21:41:52 GMT, (Andrew
Gabriel) wrote:

I always start with hammer off. If you hit mortar (particularly
lime mortar) with SDS hammer on, you end up with a hole 3 times
broader and 10 times deeper than you intended in less than a
millisecond ;-)

Also, I've had the occasional soft brick which drills fine without
hammer, but shatters to a thousand pieces if an SDS hammer drill
bit touches it.

Good advice - thanks.

Andrew

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