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  #21  
Old 24.09.2013, 10:22
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Re: Help needed - drill holes in concrete wall

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As for the power drill, I seriously recommend a Makita. In any case get a power drill that uses the drill heads with the groove - they can't slip inside the machine.
The main advantage of the SDS-Plus system being suggested (regardless of the manufacturer) isn't really about avoiding rotational slippage, but generating serious impact. The wide base of the drill-bit is in direct contact with an independently-pulsing 'hammer' that generates much more pressure through to the object material than could ever be achieved with a traditional 'hammer drill' that simply relies on a ratchet action.

I discovered all this about ten years back, when I was trying to drill mounting holes in the garage of our french house. Even using new masonry bits with my older hammer drills would take an absolute age to penetrate deeper than the softer surface layer. Like half an hour per hole, lots of sweat, and another ruined drill bit. I even thought at one point that there must be something other than concrete in the walls.

But a visit to our local Bricolage shop, where I was asking for a more powerful, higher-speed, drill, revealed all. And in fact the SDS ones generally rotate significantly more slowly. Anyway, 150 euros lighter of wallet I wandered back to the house, got the drill out and had finished drilling my eight or ten holes in about ten minutes. Absolutely amazing difference.

Edit: that EU150 purchase was before the influx of cheap power tools that makes such things available now for half that price, or even less. But mine also had a fixed-hammer setting great for chiselling tiles off and smashing the concrete shell that the previous houseowner seemed to think necessary to install under the bath I was replacing. A good investment, no question.

Last edited by Guest; 24.09.2013 at 10:46.
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  #22  
Old 24.09.2013, 11:03
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Re: Help needed - drill holes in concrete wall

That's very true in his case
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Yes, us men generally tend to take that position, as the Germans would put it: "Männer lassen sich nicht gern von Material verarschen." In other words, men don't like taking crap from materials.
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  #23  
Old 24.09.2013, 11:08
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Re: Help needed - drill holes in concrete wall

That looks like a really good bargain. Hubby is searching for the nearest store to get one. It will keep him busy this weekend and I hope I would be able to sit on sofa & watch TV on Sunday


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I just got the latest Hornbach flyer in the mail today. They have a Pattfield SDS drill (900 watts) that can handle drill bits up to 26mm in concrete for CHF 79.

The drill bit you would need is probably 10mm which will add about CHF 10-12 to that cost.

It seems that Pattfield is a home hobby level of brand that Hornbach sells.

I suggest you buy the drill then keep it or sell it as it will be cheaper/less hassle than renting for the day.
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  #24  
Old 24.09.2013, 11:11
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Re: Help needed - drill holes in concrete wall

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I even thought at one point that there must be something other than concrete in the walls.
There can be! If you hit a reinforcing rod, the head of an SDS bit glows white-hot and the carbide part sometimes falls off. Thankfully, I haven't done this too often.
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Old 24.09.2013, 11:21
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Re: Help needed - drill holes in concrete wall

Call joethehandyman.ch

He can do anything!
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  #26  
Old 24.09.2013, 12:00
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Re: Help needed - drill holes in concrete wall

So a handy tip which will solve most of this problem, even without a particularly magic drill, is to regularly wet the drill bit when drilling, using a handy cup of water. Drills lose effectiveness massively through heat, and concrete drilling generates serious heat. Try it and thank me later
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Old 24.09.2013, 13:06
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Re: Help needed - drill holes in concrete wall

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The main advantage of the SDS-Plus system being suggested (regardless of the manufacturer) isn't really about avoiding rotational slippage, but generating serious impact.
No argument here - I'm not a pro I did notice a lot of slippage with my normal Black&Decker.
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  #28  
Old 11.08.2020, 12:03
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Re: Help needed - drill holes in concrete wall

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I've got a 'proper' makita SDS drill .. However I can also recommend the cheapo from Ikea, they do a drill with a few SDS type bits included, cordless, in a nice little box for 49chf or there abouts.

It's not fancy but i've drilled a few holes in concrete just fine with it. If you only have 8 holes to do then it should be fine.
I have an IKEA Fixa drill
https://www.ikea.com/ch/en/p/fixa-ha...-ion-30232895/

but it was unable to cut through concrete.
I am now planning on trying to get a new set of drill bits instead of a new machine.
https://www.galaxus.ch/en/s4/product...s=426-1029-141

Wish me luck.
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  #29  
Old 11.08.2020, 12:15
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Re: Help needed - drill holes in concrete wall

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I have an IKEA Fixa drill
https://www.ikea.com/ch/en/p/fixa-ha...-ion-30232895/

but it was unable to cut through concrete.
I am now planning on trying to get a new set of drill bits instead of a new machine.
https://www.galaxus.ch/en/s4/product...s=426-1029-141

Wish me luck.
You'll need more than luck. New drill bits will not be sufficient. What you need, as mentioned back when this thread was first active, but not changed since then, is a proper decent SDS drill.

The one that you've got has a purely rotary action, with a sort of ratchet simply moving the mechanism back and forth, but not generating any more pressure on the concrete than you can physically exert yourself.

SDS drills, on the other hand, use a pneumatic hammer action which can generate much more force. Honestly, it will make drilling your concrete walls feel like a hot knife through butter compared with the Ikea one you have already tried.

There's a good choice at Hornbach or any other DIY shop. The cheaper ones in that link, branded 'Pattfield' are an own brand, but I have used one of their drills and some other tools for some years now and would definitely recommend them.

If it's just for occasional home use I wouldn't bother with any of the cordless models, by the way. Just not worth paying the extra for unless you're frequently moving between sites or working in isolated areas with no easy mains power supply, and the cheaper ones do tend to be somewhat underpowered, whereas even the cheapest of the mains ones will be plenty powerful enough.
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  #30  
Old 11.08.2020, 12:26
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Re: Help needed - drill holes in concrete wall

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You'll need more than luck. New drill bits will not be sufficient. What you need, as mentioned back when this thread was first active, but not changed since then, is a proper decent SDS drill.

The one that you've got has a purely rotary action, with a sort of ratchet simply moving the mechanism back and forth, but not generating any more pressure on the concrete than you can physically exert yourself.
It is possible with the "right" drill bits. But it needs time, patient, a steady hand, and cooling.

Here the entry level SDS Bohrhammer from the Bosh professional line:

https://www.microspot.ch/de/baumarkt...w--p0001207250
or this cordless one
https://www.galaxus.ch/de/s4/product...schine-8445556
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  #31  
Old 11.08.2020, 12:34
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Re: Help needed - drill holes in concrete wall



agree with the above. get an sds(plus) drill. makes things a lot easier.

just had to drill through 50cm of wall today. (why do you need 50cm internal walls???)
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Old 11.08.2020, 12:38
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Re: Help needed - drill holes in concrete wall

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just had to drill through 50cm of wall today. (why do you need 50cm internal walls???)
Be thankful. I recently discovered that one of the outer walls of our chalet is just foam covered with crepy on the outside, at least 8cm deep. Seems to be concrete blocks covered in plaster on the inside so I'm not worried about it's structural integrity, but it seems all the wrong way round to me.

All else apart, you can't solidly anchor anything in it. I fitted a couple of shutter latches t'other week, just screwed them directly into this foam by hand. They seem to be holding, but I realised at that point why none had been fitted there originally.
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Old 11.08.2020, 12:41
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Re: Help needed - drill holes in concrete wall

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Be thankful. I recently discovered that one of the outer walls of our chalet is just foam covered with crepy on the outside, at least 8cm deep. Seems to be concrete blocks covered in plaster on the inside, but it seems all the wrong way round to me
what's crepy?
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Old 11.08.2020, 12:46
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Re: Help needed - drill holes in concrete wall

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what's crepy?
Crépi (sorry for the typo) . Wandputz. 'Render' in English, I guess.
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Old 11.08.2020, 12:47
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Re: Help needed - drill holes in concrete wall

i wonder how buildings with this kind of external foam cladding can breathe and whether it will cause condensation between the concrete and foam layers.
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Old 11.08.2020, 12:49
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Re: Help needed - drill holes in concrete wall

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Be thankful. I recently discovered that one of the outer walls of our chalet is just foam covered with crepy on the outside, at least 8cm deep. Seems to be concrete blocks covered in plaster on the inside so I'm not worried about it's structural integrity, but it seems all the wrong way round to me.

All else apart, you can't solidly anchor anything in it. I fitted a couple of shutter latches t'other week, just screwed them directly into this foam by hand. They seem to be holding, but I realised at that point why none had been fitted there originally.
That’s not the wrong way but the new normal according to low energy consumption standards... my house is some 30 cm styrofoam covered with plaster on the outside.
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Old 11.08.2020, 12:49
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Re: Help needed - drill holes in concrete wall

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what's crepy?
An old graveyard at night?
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Old 11.08.2020, 12:52
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Re: Help needed - drill holes in concrete wall

We’ve just hung a rather large mirror floor that was previously floor mounted, and now needs to be out of the way of mini-HIAO as he starts crawling. Our concrete walls are hard work.

After I did the bloke maths, I couldn’t justify buying a dewalt SDS drill from Jumbo that i thought would be perfect. With the right concrete drill bits, it was about 150 bucks per hole.

I think Jumbo also sell a mains SDS drill for 49 bucks and some price points in between.

In the end, I borrowed a non-SDS Bosch Pro, and worked patiently up though drill bit sizes, starting with 3mm. Took 15 mins in total for 2 holes.

Drill was fine. And cost me a bottle of Prosecco.
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Old 11.08.2020, 12:58
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Re: Help needed - drill holes in concrete wall

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Here the entry level SDS Bohrhammer from the Bosh professional line:

https://www.microspot.ch/de/baumarkt...w--p0001207250
I think I have this Bosch model, non-professional but it says SDS-Plus in the description:
https://www.edileehobby.ch/macchinar...0-re/p/4302275
just out of curiosity, would it also work on concrete (with the proper bit)?
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Old 11.08.2020, 12:59
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Re: Help needed - drill holes in concrete wall

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i wonder how buildings with this kind of external foam cladding can breathe and whether it will cause condensation between the concrete and foam layers.
No, it doesn't. It's a complex system, called ETICS (externally thermal insulated composite systems). They have different layers, and they prevent sudden thermal bridges where condensation could occur.
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