andrew-theasby
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| posted on 2/12/12 at 07:54 PM |
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150mm holes through brick
Hi, whats the best way to make about half a dozen 150mm holes through a brick wall (3 total, through both sides of the wall)? I have a decent sds
drill so was thinking either a tungsten carbide tipped or a diamond tipped hole saw. Which is best or is there a better/cheaper way? Is the sds the
best tool for doing it or will it be too torquey, what about a normal hammer drill, or even just chain drilling and chiseling? Dont mind paying the
£30 for the tool as long as it wont burn out on the second hole!!
diamond tipped
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br />
Tungsten carbide
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zilspeed
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| posted on 2/12/12 at 08:05 PM |
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Must be the correct tool for the job, which is a big old core cutting drill which works at lower speed, has a brace to help you steady it and most
importantly, a clutch.
Try it without a core cutting drill and you run the very real risk of at least a broken wrist.
Pilot drill, then a core cutter with mandrel is the correct way.
You can hire the whole setup including the 150mm core cutter and also the power tool.
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BenB
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| posted on 2/12/12 at 08:10 PM |
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I'd be surprised if yoru SDS drill doesn't have a clutch. Even my screwfix cheapy did. I'd go for a cheap and chearful TCT core
drill. I've done a number of holes this way during my house resto. The bits aren't quite so good on the fifth hole as they are for the
first but you can get them pretty cheaply via ebay so they're eminently replaceable.
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daniel mason
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| posted on 2/12/12 at 08:44 PM |
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id mark up 150mm circles with a pencil and pepper loads of 5.5mm holes with sds drill then bash it out with a hammer and chisel! in true locost
style.
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v8kid
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| posted on 2/12/12 at 08:49 PM |
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My cheapest of cheapest Argos SDS has a clutch. Just drilled a 110mm hole through a 600mm solid whin rubble wall using a Tool Station diamond hole
saw. Just take it easy and let the drill do all the work.
Slow but thats just the way of it.
Cheers!
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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andrew-theasby
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| posted on 2/12/12 at 09:39 PM |
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Just measured the bit of pipe luckily, and its nearer 160mm, it seems theres a cheap tct hole saw available at 162mm but the diamond ones are much
dearer. Think ill try the cheap one, but drill a few holes on the circumference too to help it along its way and give the drill a bit of an easier
time too. Thanks for the quick replies.
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Confused but excited.
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| posted on 2/12/12 at 09:42 PM |
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My cheapo Chinese SDS died on it's arse trying to cut a 100mm hole in breeze block.
My advise; hire the proper drill that will handle a150mm cutter or use the locost solution, ring drill a load of small holes and smack out the
middle.
[Edited on 2/12/12 by Confused but excited.]
Tell them about the bent treacle edges!
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JoelP
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| posted on 2/12/12 at 09:59 PM |
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All the ways above work well. Agreed with the clutch though, lad i know smashed himself in the face (eyebrow) when a supatool drill jammed. He was
doing it without the second handle though. Hold it properly, brace it, and work out which way it will go if it does jam!
Assuming you have a core drill the right size, id suggest using it to mark out a nice tidy circle 5mm deep, then drill with a normal bit all the way
round to weaken it/remove some material. This makes it much easier for the core drill to progress. Try it on hammer and just spin, and see which works
best - depends on what you are drilling.
If the core drill is taking too long, id swiss cheese the middle and use a chisel bit in the sds to finish it off.
Beware! Bourettes is binfectious.
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andrew-theasby
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| posted on 2/12/12 at 10:01 PM |
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Its a dewalt d25404k, do you think that will be man enough, it was too expensive to risk breaking, but surely expensive enough that i shouldnt have to
worry about breaking it should i?
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Stott
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| posted on 2/12/12 at 10:03 PM |
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To put a soil pipe through my wall (block inner brick outer) I chain drilled with my sds and knocked the centre out and tidied up, took all of half
hour.
I used said sds drill with a lidl 63mm t carbide core drill last weekend on the same wall, arbor came loose and fell out, core bit snagged and spun
the drill, my arm hurt but luckily I didn't get chucked off the ladder lol, stupid lidl core cutter. It snagged so bad it twisted the sds part
of the cutter through 90 degrees so now it's unuseable, twas only a fiver though so can't complain as I did the job with it.
My vote goes for chain drilling especially if you have an sds and some drill bits/chisel bits already.
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JoelP
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| posted on 2/12/12 at 10:47 PM |
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quote:
Originally posted by andrew-theasby
Its a dewalt d25404k, do you think that will be man enough, it was too expensive to risk breaking, but surely expensive enough that i shouldnt have to
worry about breaking it should i?
Looks a good drill. Id spare it coredrilling the full way though, and chain drill after the circle is marked. I use a £50 titan drill which has cut
loads of holes, but its cheap enough that it doesnt matter if it breaks (though it is actually more powerful than that dewalt).
Beware! Bourettes is binfectious.
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