Drilling BIG holes in rock: SDS core bit + DCH133

Рет қаралды 7,595

Күн бұрын

Here I try drilling a 50mm hole in super-hard quartzite rock with a Renegade brand core bit/hole saw.
The drill is the DeWalt DCH133. This scenario was inspired by a viewer question, so if there's something like this you need to know, hit us up in the comments and I'll see what I can do.
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00:00 - Intro
00:21 - The bit
01:13 - Drilling concrete
02:23 - Drilling hard rock
04:34 - Trying predrilling
06:09 - How'd that go?
07:40 - Conclusions

Пікірлер: 18

@justinoff1 7 ай бұрын

That centering bit should be removed once you have your core established

@tassie7325 9 ай бұрын

As can be seen when starting in the stone, the centre guide drill was struggling right from the start. So once the hole saw section hit the stone, the drill was trying to drive both the hole saw and the guide drill. Maybe drilling a smaller pilot hole first would at least reduce the workload on the guide drill.

@skygreen5939 11 ай бұрын

It sounds like you had the hammer mode turned on. I'm not 100% certain, and admittedly this is unintuitive, but i'm pretty sure the optimal drilling setting for coring is with the hammer mode off (i.e. drill only). My understanding is that the hammering rapidly dulls and/or breaks off the hard cutting elements of a core bit (carbide, diamond, etc), and that unlike with a solid bit, the hammering action isn't necessary. Maybe worth investigating?

@tamaskep4902 11 ай бұрын

Hi, this is a carbide bit, that needs to be hammered, although it is more for brick and limestone etc., then hard cocncret. It is definitely not for reinforced concrete, fir that you need diamond bit core, that, as you mentioned,. mustn't be hammered. Also the 8mm drill is need to be removed once you reached like 2-3mm, as it serves only for centering the core bit, and will slow you down considerebly

@skygreen5939 11 ай бұрын

@@tamaskep4902 ah - turn the hammer off on diamond only, eh? good info - thx!. Good point on the guide bit too

@tamaskep4902 11 ай бұрын

Most welcome! Been working with these bits as an electrician. I like both types. The carbides are much cheaper and great with hammer drills,.the diamond bits.are working best with at least 1000watt(corded) drills.

@BoltahDownunder 11 ай бұрын

@tamaskep4902 Thanks mate! That makes sense that the pilot bit can be taken out. It didn't help much.

@tamaskep4902 11 ай бұрын

@@BoltahDownunder my pleasure. Your tests helped me to choose a great hammer drill( a HIkoki 36v), so thanks 🙏

@fredio54 4 ай бұрын

Just bought an "82mm" diamond core drill and adaptors for normal and sds plus chucks. Would be interesting to see the same drill drill the same rock and use the old footage for a side by side overlay. Trouble with my new bit is it's 80-80.5mm and I'm not confident it'll bore oversize by 1.5-2mm to get my 82mm PVC through. Hmmmm.

@BoltahDownunder 4 ай бұрын

Hmmm oversizing with core bit? that I can't tell you, but if you drill almost through and then perforate with say a 10mm bit all around the hole it might be big enough.

@fredio54 4 ай бұрын

@@BoltahDownunder My intention is to pre drill all the way through with a plain impact pilot, then get the big hole started straight and steady, then stop, measure, and if good continue, if not remove the drill from the centre and work it around in circles at all depths as I go further in so as to enlarge it as I go effectively using it like a drum sander or something. I'll let you know how it works out and when I go to pick up the adaptor I'll measure some of the other sizes and see how they compare with the number on the box/laser engraving.

@vasiltop 11 ай бұрын

Hi I like your hole punch channel and I think you have a spot on, I use makita batteries but I don't know if the dhr 243 is reliable and strong enough. Harseam bosch gbh 18v -26 or Ryobi or this DeWalt. What is your recommendation.

@adamdavis2788 11 ай бұрын

Used a Bosch and dewalt side by side and this dewalt wipes the floor with the Bosch

@BoltahDownunder 11 ай бұрын

What's your application? Makita should be reliable enough for most uses. But the 243 doesn't hit that hard. You could upgrade to a DHR 282 if you want more impact energy. Or if you want to change brands I can recommend the DeWalt DCH263. It's also 28mm rated and hits hard but is quite affordable & nice to use

@robertbroughman2056 3 ай бұрын

Take the center bit out after the core is started

@MrHassancehef 11 ай бұрын

seem to be perfect to manufacture holds on route! (well this is off course a joke :p )

@BoltahDownunder 11 ай бұрын

Lol. Back in the 90s there was a style of inset gym holds that fit into a big hole like this, so you're not wrong!

@MrHassancehef 11 ай бұрын

@@BoltahDownunder remember those kind of holds, but I was more thinking about those awfull chipped holds: kzfaq.info/get/bejne/arh-d86qz8u5aXk.html (look behind the guy)