On Fri, 13 May 2005 09:43:31 +0100, Bill Woods
wrote:

Do drill bits for use in ordinary "home use" drills get blunt with
the result that they work less well?

Decent quality tungsten carbide masonry drills for "home use" should
maintain an edge for longer than it takes for you to lose them. Maybe if
you're in a granite or blue brick house and doing a lot of work you'll
wear them out, but for "average" use this just shouldn't be an issue.

Be aware that not all drills with a brazed-in insert use carbide. The
market stall crap is now just that - crap. If your drill bits are
wearing out, get better drills.

You have little chance of sharpening them, although it's easy to do
(much easier than a bit for metal). The right abrasive to do it will
cost you more than several year's supply of drills. Although you can
easily sharpen the non-carbide inserts, it's not worth it.

And get an SDS drill. You won't look back afterwards.

--
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