The Accidental Smallholder Forum
Smallholding => Buildings & planning => Topic started by: Womble on June 03, 2017, 08:53:05 pm
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Hi folks,
I need to drill 24x 10mm diameter holes in an old stone wall (see attached picture). Usually I get to pick which spot to drill into, but not this time, since it's for wall ties. This means I'm going to have to drill through some very hard stones.
I have an SDS hammer drill. Any idea what bits I need to buy for it, and what method I should use?
Cheers! :thumbsup:
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well SDS 10mm bit obviously :) long enough to achieve the required depth. You may start with a smaller bit 1st if you want - 6mm perhaps - to help positioning the holes - but an SDS should go in OK directly with a 10.
method? - if you've not used SDS before I'd only say don't push too hard - you need to allow space for the hammer action to work - just apply moderate pressure and let it go in at it's own speed.
Main issue with stone walls is when you start on the mortar and hit a sloping stone underneath which deflects the bit off to the side - particularly if it's the old lime mortar - not sure if there's an easy answer to that - other than taking it slow until you're sure your properly into the stone.
HTH
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SDS Masonary bits.
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Hmmm, I'm not sure a standard masonry bit is going to be enough though - I've blunted plenty of non-SDS ones in my time. Perhaps I was pushing too hard of course (thanks for the tip Mab).
I just wondered if there was something tougher out there, that might be worth considering?
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yes - let the saw do the work as my dad taught me - same with a drill - you get too many people pushing equipment to its limits and beyond trying to do a fast job when the job takes time
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Just buy quality drill bits from a tool store..not from the supermarket or your local pound shop.
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hilti bits ,( TE-CX 4 cutting surfaces ) if you get some get from hilti so you be sure they are genuine and tell them what you want to drill , makes a difference .rest drill bits during work , as others have said dont force the work and get them redressed professionally, and don't forget if possible water for cooling / dust control I used a pump sprayer.
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What about diamond core drills they dont tend to get deflected