BenB
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| posted on 17/7/08 at 01:11 PM |
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OT: anyone done any core drilling with a SDS drill?
A bit OT I know 
I've got to drill a 100mm hole through a wall in our flat. I've got a 100mm TCT core drilling bit and all the trimmings (arbor, pilot
drill etc etc) and I've got a cheapo SDS plus drill (flipping heavy one alas).
but...........
the health and safety brigage on some DIY forums tend to say that unless you use a drill with a clutch for core drilling you're almost
guaranteed a broken wrist.
This true???? I can imagine if you want to use loads of pressure behind the bit to get the job done quickly it'll bite like a byatch but surely
if I'm prepared to take my time and go slowly through red brick it's not going to snag *that* badly.
Or am I just being stupidly optimistic???
Plan A at the moment is to try and do it with the stuff I've got but if it snags badly or repeatidly go and hire a clutched drill before I do
myself a mischieve....
Just wonder if the "you should use a drill with a clutch" advice is based upon past (painful) experience or just based upon the fact that
everyone else says you should do it!!!
Thanks in advance for any learned opinions!
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Mr Whippy
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| posted on 17/7/08 at 01:17 PM |
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A clutch? I’ve done this many times with my big Bosch drill (a should add through poured concrete not some woosy red brick) and it doesn’t have one,
besides there’s hardy a lot of torque reaction when core drilling as its slow speed cutting. Even if you hit metal it will just bounce of. These
health and safety people would have you wearing goggles, huge gloves and earplugs to open an envelope.
[Edited on 17/7/08 by Mr Whippy]
Fame is when your old car is plastered all over the internet
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James
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| posted on 17/7/08 at 01:23 PM |
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Someone installing aircon in their bedroom then?
I don't *know* about the H&S implications but I would have thought if you forced yourself to keep the speed low then even if it catches, how
bad can it be.... but keep it slow.
My £60 or so Ryobi has a clutch AFAIK so not something I've thought about much! 
Cheers,
James
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"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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mr henderson
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| posted on 17/7/08 at 01:29 PM |
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quote:
Originally posted by James
Someone installing aircon in their bedroom then?
It's probably a system for extracting noxious nocturnal smells, a f@rt can hang aroung the atmosphere of a bedroom for quite a long time unless
extracted
It can't be for a cooker hood because modern ones use 5" or 6" piping for much higher airflow
John
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Mr Whippy
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| posted on 17/7/08 at 01:32 PM |
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quote:
Originally posted by mr henderson
quote:
Originally posted by James
Someone installing aircon in their bedroom then?
It's probably a system for extracting noxious nocturnal smells, a f@rt can hang aroung the atmosphere of a bedroom for quite a long time unless
extracted
John
Oh dear I’m so sorry to hear of your troublesome bowels  you should see a doctor about that
Fame is when your old car is plastered all over the internet
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BenB
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| posted on 17/7/08 at 01:35 PM |
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It's not for anything as exciting as aircon or methane extraction. It's for a flatmaster2000 (love the name)... It's a positive
pressure ventilation system for our basement (ie damp) flat!!! Obviously with tanked walls we're reliant on airflow to keep the humidity down
and at the moment we ain't go any airflow!!!
The speed or drilling will unfortunately be totally dependant on how quickly a 850W drill going turns a 100mm TCT core drill attached IE binary speed
control on this drill (it's that cheap.....).....
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splitrivet
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| posted on 17/7/08 at 01:35 PM |
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Even the cheapo SDS drills have a clutch.
If your using a core bit it shouldnt be a problem any road, just keep a good grip on the drill and use the secondary grip dont rely on the pistol grip
alone otherwise even with a clutch you can break your wrist.
Just remember to switch off hammer.
Cheers,
Bob
[Edited on 17/7/08 by splitrivet]
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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theconrodkid
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| posted on 17/7/08 at 01:39 PM |
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ive done core drilling,with a proper core driller that has to be anchored to the ground with rawl bolts as it WILL break your wrist if it
catches,dunno about the clutched ones but i would have thought they would be forever slipping as the corer bites
why not break the brick/half brick out and plod the hole up around the pipe?
[Edited on 17/7/08 by theconrodkid]
who cares who wins
pass the pork pies
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eccsmk
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| posted on 17/7/08 at 01:49 PM |
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i have a bosch multi and a proper core drill
only differance is the core drill tries to snap your arm every now and again and spins faster.
my old fella uses his cheapo B&Q jobbie for coring without any hassle
so drill away
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BenB
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| posted on 17/7/08 at 01:49 PM |
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The wall's very thick. Taking out huge chunks and repairing around the pipe sounds a huge job. At the end of the day worst comes to the worst
I'll get a clutched drill. But it's true they often prematurely trigger with big core bits...
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BenB
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| posted on 17/7/08 at 01:50 PM |
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quote:
Originally posted by eccsmk
i have a bosch multi and a proper core drill
only differance is the core drill tries to snap your arm every now and again and spins faster.
my old fella uses his cheapo B&Q jobbie for coring without any hassle
so drill away
Job's a good un
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mr henderson
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| posted on 17/7/08 at 01:58 PM |
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quote:
Originally posted by Mr Whippy
quote:
Originally posted by mr henderson
quote:
Originally posted by James
Someone installing aircon in their bedroom then?
It's probably a system for extracting noxious nocturnal smells, a f@rt can hang aroung the atmosphere of a bedroom for quite a long time unless
extracted
John
Oh dear I’m so sorry to hear of your troublesome bowels you should see a doctor about that
Actually it's not me! I don't mind the smell of my own
John
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nige
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| posted on 17/7/08 at 02:58 PM |
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ive just drilled 100 mm hole for boiler flue
with a "liddle" sds drill
just the job , i was a little red afterwards though ( brick dust )
when you start this journey
you think it will be done in " no " time but then " no " turns into a " bloody " long time
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Mr Whippy
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| posted on 17/7/08 at 03:08 PM |
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quote:
Originally posted by mr henderson
quote:
Originally posted by Mr Whippy
quote:
Originally posted by mr henderson
quote:
Originally posted by James
Someone installing aircon in their bedroom then?
It's probably a system for extracting noxious nocturnal smells, a f@rt can hang aroung the atmosphere of a bedroom for quite a long time unless
extracted
John
Oh dear I’m so sorry to hear of your troublesome bowels you should see a doctor about that
Actually it's not me! I don't mind the smell of my own
John
bet the wife says the same thing
Fame is when your old car is plastered all over the internet
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BenB
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| posted on 17/7/08 at 03:10 PM |
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quote:
Originally posted by nige
ive just drilled 100 mm hole for boiler flue
with a "liddle" sds drill
just the job , i was a little red afterwards though ( brick dust )
Does it have a clutch do you know?? I doubt it (if it's from LIDL) but you never know!!
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splitrivet
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| posted on 17/7/08 at 03:21 PM |
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YES THEY DO HAVE A CLUTCH.
Cheers,
Bob
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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adam1985
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| posted on 17/7/08 at 04:29 PM |
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i used to use a big hilti to do my core drilling with no clutch just gotta hold on tight and brace yourself for when it does catch cause it will but
your'll be fine without a clutch my new core drill i use is brill spins far faster than the hilti and flys through with a tct drill you can use
hammer its the diamond drills you dont
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James
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| posted on 17/7/08 at 04:55 PM |
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quote:
Originally posted by BenB
The wall's very thick. Taking out huge chunks and repairing around the pipe sounds a huge job. At the end of the day worst comes to the worst
I'll get a clutched drill. But it's true they often prematurely trigger with big core bits...
I'd be tempted to chain drill it and then use a brick bolster to take out the remains.
The hole can be left pretty neat... with only a small amount of mortar needed around the flue to fill the gaps.
just a possible alternative!
HTH,
James
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"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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BenB
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| posted on 17/7/08 at 05:09 PM |
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Yup! stitch drilling was my original plan.... until I drilled a test hole. It's a triple layer (ie double air gap) wall 30cm thick!!!
that's some serious drilling! But I might resort to that if the core drilling fails...
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DavidW
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| posted on 17/7/08 at 06:36 PM |
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I've done a 100mm hole through a breeze block cavity wall using a cheapo B&Q SDS drill.
It went like a hot knife through butter but did make a fair bit of dust.
As above, hold it tight and use the secondary grip, should be fine.
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DarrenW
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| posted on 18/7/08 at 09:40 AM |
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Go for it. I used my mates dewalt SDS drill and core drill set recently. That had a lightish clutch so had to be steady with pressure and keep it
level to stop it clutching.
Clutchless should be OK, just be ready to release trigger if it bites and make sure you are secure if up a ladder.
Mate told me to drill through with pilot drill first, then fit the core and get it started. The remove the pilot. Also dont use hammer mode on certain
core drills.
It will only hurt once.
Use glasses. Not for the obvious, but when you break through i found the draft that rushed through blew lots of dust in my face!
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