Drilling holes in concrete wall. Is this tool suitable?

[roland53]

Shelter... guess if it will be crammed with reinforcement!!

Then you should probably look at the construction drawings before you start because if it's a fairly modern shelter, there's almost more reinforcement than concrete in these walls. I actually don't even think you can use this type of machine for what you're going to do.. It relies on you making a cut with the two parallel discs in the concrete and then using a crowbar to break off a part to make a new cut and eventually come through. In the construction you're going through, you have endless reinforcement in all directions, both vertically and horizontally, and if you make a cut from top to bottom, you will encounter a lot of vertical reinforcement that is likely to hold the concrete together so it can't be broken. You've only cut the horizontally lying reinforcement bars. To break it, you would then have to make a lot of new cuts across the entire length. The reinforcement is dense, so there is a big risk this will happen.

Yes, I've now purchased a K3000 cut n break machine. Absolutely wonderful to work with. Thanks to the belt drive, it surprisingly doesn't have kickback or throw tendencies. Regardless, you should always respect such machines and be cautious to stand firmly and pay attention to how you hold the machine. I found it with a local supplier for just a few hundred bucks more than I could find it online. The local firm also offers service if needed, which in itself can be worth a lot... Initially, I thought the prices I found were excluding cutting discs, but it turned out discs were included, and the whole was just under 19,000:-. I expect there will be residual value on the machine when the job is done in a few months, so keep an eye on Blocket if you're interested in such a machine. Practiced on a door opening and the wall is 275 mm thick. The first piece is now loose. None of the concerns Oceanis had have appeared. The reinforcement bars found were 12 mm but were cut by the machine without any issues. Surprisingly few reinforcement bars. Good for me, but one might wonder what requirements they really had for shelters in 1952 when it was built? The work has just begun, so it remains to be seen how many discs will be needed. Discovered that the price can vary greatly from 1600 to about 2500:- /pair. There are different hardnesses of discs, so you have to make sure to get the right hardness adapted to the material you are going to cut.

 

[oceanis]

I must agree that it doesn't seem to be reinforced according to current regulations anyway.....

Otherwise, I can only agree that the machine/machines are amazingly good. I've seen them in action several times and always with the same result.

 

[Radhuset]

Hello,

I am working on a large project and need to create 6 door openings, each 210*90 cm. The concrete wall is about 20cm thick. I am not sure how many sets of blades will be needed. Obviously, the wear varies depending on the concrete and reinforcement.

How long did it take to cut the door opening? How long does the diamond blade last?

 

[roland53]

Now, there are double blades but they last a long time. I would like to claim that when you have finished your 6 door openings, you have half the wear surface left on the blades.
The condition is that you don't push or force but let the machine work its way in by its own weight and of course that you cool with water the whole time.

I took a few days per door opening as it was in a rental building, and to minimize noise disturbances, I didn't run the machine for many hours per day.
Hard to say the time.
But the machine is relatively heavy, so it's not wrong to take it over a longer period.

 

[hempularen]

But what does it cost to have a concrete cutting company do the job?

I have seen it done, a doorway. First, he bolted a track to the wall, and the machine climbed the track by itself. The whole door opening, including mounting the tracks, took a few hours. Or rather, he had just started sawing when I passed by on my way to my workplace, and two hours later when I passed by again, he was almost done, but there was a waterfall through the entire reception area, down the company's entrance stairs. He had managed to cut a pipe for the sprinkler system... The sprinkler was said to deliver 20,000 liters per minute. There were large tanks in the basement because the municipal pipes do not provide such a high flow.

 

[roland53]

Yes, in that case it probably turned out expensive, I imagine

 

[Radhuset]

But what does it cost to let a concrete cutting company do the job?

I've seen it done, a door opening. He first bolted a rail to the wall, the machine climbed on the rail itself. The whole door hole incl. mounting the rails took a few hours. Or rather, he just started sawing when I walked past to my workplace, when I passed by 2 hours later, he was almost finished, but there was a waterfall through the entire reception, down the company's entrance stairs. He managed to cut a pipe for the sprinkler system.... The sprinkler was said to be able to deliver 20,000 liters per minute. There were large tanks in the basement, because the municipal pipes don't provide such high flow.

Received a quote for cutting.

New door opening 910x210 with 20cm depth in concrete. 8671kr incl. VAT
New window opening 1400x700 with 30cm depth concrete 6625kr incl. VAT
New vent opening 110mm in diameter 30cm concrete 1865kr incl. VAT

Then I have to raise all 9 doors which costs 17500kr more...

Feels like a Cut N break is a given

 

[Radhuset]

Now they are double blades, but they last a long time. I would like to claim that when you're finished with your six door openings, you'll have half of the wear surface left on the blades.
The condition is that you don't push or force it but let the machine work its way in by its own weight and, of course, that you cool with water all the time.

I took a few days per door opening as it was in an apartment building and to minimize noise disturbances, I didn't run it many hours per day.
It's hard to say the time.
But the machine is relatively heavy, so it's not wrong to stretch it out over a longer period.

Thanks for the answer! Do you still have your machine or have you already sold it?

 

[Stefan1972]

campaign now at verktygsproffsen. 14500plus VAT

 

[roland53]

Thanks for the response! Do you still have your machine or have you sold it already?

It was sold

 

[roland53]

campaign now at verktygsproffsen. 14500plus VAT

I also looked at vertygsproffsen, but keep one thing in mind.
It's good to buy it nearby in case you need repairs and service.

My choice was a dealer close to me even if I had to pay a few hundred more.

Also, check if the price is with or without blades and in your case for concrete.

There are different blades depending on what material you are going to cut.

 

[SBH]

Yes, I have now purchased a K3000 cut n break machine. Absolutely wonderful to work with. Thanks to the belt drive, it surprises with having no tendency to snag or kickback. Regardless, one should still have respect for these kinds of machines and be cautious to stand firmly and how to hold the machine. I found it at a local supplier for just a few hundred more than what it could be found for online. The local firm also has service if a need arises and just that can be worth a lot…

At first, I thought the prices I found were excluding cutting disks but it turned out that disks were included and the total came to just under 19,000:-. I expect there will be some residual value on the machine when the job is done in a few months, so keep an eye on Blocket if you're after this kind of machine.

Practiced on a doorway and the wall is 275 mm thick. The first piece is now loose. None of the concerns that Oceanis had have arisen. The reinforcement bars present were 12 mm but were cut by the machine without issue.

[image][image][image]

Surprisingly little reinforcement bar. Good for me, but one might wonder what the actual requirements were for shelters in 1952 when it was built? The job has only just begun, so it remains to be seen how many disks will be needed.

Discovered that the price can vary greatly from 1600 to about 2500:- /pair. There are different hardness levels on the disks so you need to be careful to get the right hardness adapted to the material you will be cutting.

Get a proper mm ruler instead :wow:

 

[seniorkonsult]

Watch your toes!

 

[roland53]

fix a proper mmstock instead :wow:

If you think that would get the job done :wow:

But a Skåning can handle any ruler, don't understand the problem

This job was finished long ago, the thread was resurrected.

 

[vergis]

Yes, I have now purchased a K3000 cut n break machine. Absolutely wonderful to work with. Thanks to the belt drive, it surprises with not having any grabbing or throwing tendencies. Regardless, you should always have respect for such machines and be careful to stand firmly and how you hold the machine.
I found it at a local supplier for just a few hundred more than it could be found online. The local company also offers service if needed, which alone can be worth something…
At first, I thought the prices I found were excluding cutting discs but it turned out that discs were included and the whole thing ended up just under 19,000:-. I expect there to be a residual value on the machine when the job is done in a few months so keep an eye on Blocket if you're looking for such a machine.

I practiced on a door opening and the wall is 275 mm thick. The first piece is now loose. None of the concerns that Oceanis had have come up. The rebar present was 12 mm but was cut by the machine without a problem.

[image][image][image]

Surprisingly little rebar. Good for me, but it makes you wonder what requirements one really had for shelters in 1952 when it was built?
The job has just started so it remains to be seen how many discs will be used.
I discovered that the price can vary greatly from 1600 to about 2500:- /pair. There are different hardness levels on the discs so you have to be careful to get the right hardness tailored to the material you are going to cut.

Hello!
I'm going to cut a hole for a door this weekend and have rented a Husvarna cut and break.
Concrete blocks. Do you have any tips for using it?