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Wood + concrete drills

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rlitman

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Are those multi-material bits? I'm not quite sure what the OP is asking about, but I think he wants bits that can drill in both wood and concrete.

Regular masonry bits have a negative rake relief on the carbide that will not drill wood.
Bosch (and a few other companies) make special carbide tipped bits that have a rake angle able to drill wood, steel, and also concrete, among other things.
Here is one example:
http://www.amazon.com/dp/B003TO5FEA/?tag=atomicindus08-20
 
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rlitman

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Agreed. The multimaterial bits are not so great in concrete, and not so great in metal, but here's two places that I was really pleased to have a set sitting around for.

1) I had to drill through a steel door frame set into concrete. They went right through the steel and concrete in one shot.
2) I had to drill through a wooden sill plate for concrete anchor bolts. They went right through the wood and then the concrete.

In either of those cases, if I started with a regular twist drill, I would have ruined the bit as soon as it hit concrete. And a masonry bit would not have been able to start the hole.
 
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Monte

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for the tasks you described the multi material drill bits are perfect, but for wood i would use wood drill bits and for metal metal bits....for stone (brick) the multi material bits work good though.
 
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neophyte

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You would be better off buying bits for the specific material you want to drill. If you choose to go with multi-material bits, the Bosch ones are made in Germany, or at least the ones I've seen in the US are, so I presume it would be the same for Europe.
 
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MellyVan

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Well,
I'm not a fan of multi-material. I already have a cassette with good metal bits, so am looking for both wood and concrete bits.

Thanks Monte for using the Dutch sites for me, really fantastic help!! The Bosch set seems great. What I also like about this is the 'set' it is in. I want one line, one complete set, not multiple bits laying around.

So for concrete, the first Bosch set you sent seems the best deal, correct?

As for wood, I like the Famag set on bootbouwer.nl - is the 14,95 euro set good or more rubbish, seeing as their next 10-piece set costs 10x more, 149,95 euro to be exact?
 
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rlitman

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Sorry, but this is wrong. They are indeed drills. What you call a "drill" is simply the tool that rotates the chuck.
 
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rlitman

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Monte said:
for the tasks you described the multi material drill bits are perfect, but for wood i would use wood drill bits and for metal metal bits....for stone (brick) the multi material bits work good though.
Click to expand...

Totally agreed. Multi-material bits are not the best at anything. They fill a small niche and handle otherwise difficult jobs. They are also good for field techs who do not know what they will encounter next and must be prepared for anything. But as usual, a jack of all trades is master of none.

Anyway, I only suggested the multi-material bits because of my understanding of the original question. The language barrier clearly left me with the wrong impression.
 
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bcradio

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What I call a drill is what Wikipedia calls a drill. I mean I can understand that the bit can simply be referred to as a drill, but why introduce the confusion. Nobody has problems interpreting drill bits.

Edit: so in rebuttal, sorry but no it isn't wrong
 
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MellyVan

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Not everyone is american :)

It's just a language barrier thing, we call this a bit:
Bits_851-1_BDC.jpg


and this a drill:
175208.jpg


and this a drill machine:
makita-accu-schroefmachine-boormachine-bdf343rhe.jpg


And good you pointed it out, because that's not proper English/American.


Back on topic:
@Monte: So for concrete, the first Bosch set you sent seems the best deal, correct?

As for wood, I like the Famag set on bootbouwer.nl - is the 14,95 euro set good or more rubbish, seeing as their next 10-piece set costs 10x more, 149,95 euro to be exact?
 
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Monte

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MellyVan said:
@Monte: So for concrete, the first Bosch set you sent seems the best deal, correct?

As for wood, I like the Famag set on bootbouwer.nl - is the 14,95 euro set good or more rubbish, seeing as their next 10-piece set costs 10x more, 149,95 euro to be exact?
Click to expand...

the Heller set is 5.- cheaper so maybe i would buy that set......
but for concrete the Bosch might be better (?).....

The 14,95 Famag set should work, it´s a standard quality set with chrom vanadium drill bits. The higher priced bits are made of HSS and are ground, usually have a better runout and come with a special point/tip for better/cleaner cutting hence the difference in the price. So for the DIY user the 14,95 set and for the professional/perfectionist the HSS set.
 
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MellyVan

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Thanks for the info Monte...

As for wood:
CV drill bits are capable of temps up to 250degr celsius, whereas HSS drillbits withstand almost 600degr celsius. So I am going for HSS, that's for sure.

As for concrete:
The Bosch ones have a hard metal carbide tip (thats where the HM CT stands for), which is better. I like those, since not every other brand states the materials on the sets or drill bits (not even Metabo and the like)...
 
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Monte

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Stone drill bits usually have carbide tipped heads. If there are big differences in quality of the carbide among the professional manufacturers and which one is better/lasts longer i don´t know.... But you can´t go wrong (i think) if you buy something from these manufacturers:
http://en.pgm-online.org/company-list/


just played around with some wood drill bits....soft wood, hard wood, plywood, multiplex, laminate, even plastic and rubber...no problem for wood drill bits :thumbup:

 
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