Hard concrete/SDS U/s

Sidney Endon-Lee · 2010-05-04T11:41:17+00:00

Just to resurrect an old thread (sorry about the new posting), but thedrill that was 'full of sound and fury, signifying nothing' now drillsholes in concrete nicely.The solution turned out to be an idiosyncratic chuck mechanism - anignorant user rather than a definite bad tool.In all the other SDS drills I've used, you simply insert the bit asfar as it will go, then twist until it 'clicks', and you are good togo.In this drill, if you do this, it won't work properly.What you actually have to do is insert bit as far as it will go. Pullon bottom of rubberised chuck, which splits circumferentially,allowing the bit to be inserted further, let go of chuck, whichsprings back and locks onto bit, which now cannot be pulled out - torelease, you have to pull on the bottom of the chuck again.The above was a mechanism I'd never come across before.Regards,Sid

May 04, 2010 23 Replies

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The Medway Handyman 16 years ago

(wasn't me, it was Nat Phil).

(that wasn't me either)

It would !!

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John Rumm 16 years ago

I know - you can tell by the level of indentation

see above

Wasn't as much as I had expected ;-)

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Dave Plowman (News) 16 years ago

All I've noticed is a hammer drill won't touch hard concrete, whereas an SDS whizzes through. Same with engineering bricks.

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John Rumm 16 years ago

Could well be a case that the size of the individual impact is the most important factor.... i.e. if 0.1J does no damage at all, then lots of them in quick succession will do multiple lots of no damage. Whereas 2J might make an impression!

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