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Old 06-01-2013, 12:46 PM   #1
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Hollow Clay Brick - Need to Cut


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Tried using a small Coleman angle grinder with a diamond blade, but it would have taken all weekend to cut one block in half. For one thing the blade wobbled on the shaft.

These bricks aren't made any longer as far as I know around here - eastern Ohio. I need to cut just 3 or 4.

Should I just rent a REAL machine?

Thanks!


Last edited by pilk00; 06-01-2013 at 12:51 PM. Reason: add photo
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Old 06-01-2013, 12:59 PM   #2
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Hollow Clay Brick - Need to Cut


Hollow Clay Brick - Need to Cut-capture.jpg

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Old 06-01-2013, 02:03 PM   #3
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Hollow Clay Brick - Need to Cut


You can pickup a 4 1/2" angle grinder at harbor freight for $15.00/$20.00 and a set of disc's come with it.
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Old 06-01-2013, 02:05 PM   #4
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Hollow Clay Brick - Need to Cut


+1

That or take it to Home Depot and have them wet saw cut it.

You will just have to rotate the block 4 times but if you set up the fence on the table, should be quick and easy and have a clean cut line.
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Old 06-01-2013, 02:24 PM   #5
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Hollow Clay Brick - Need to Cut


You can cut this block using a circular saw and a diamond blade. The lowest cost diamond blades are about $15. Four cuts, you are done.
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Old 06-01-2013, 04:06 PM   #6
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Hollow Clay Brick - Need to Cut


coleman makes an angle grinder ? had no idea,,, nevertheless, any small grinder w/4" diamond tile blade IS the tool,,, apron/vest stores sell 4" tile blades OR you can buy 'em off eBay from ' greens garage ' for $ 3 ea.

WOBBLING BLADE MIGHT BE A KILLER/MAIMER ! most likely reasons for the wobbles: 1, blade nut wasn't tight enough; 2, the blade was distorted; 3, blade's bent concave from not using the proper blade spacer behind the blade; or 4, shaft bearings are shot,,, normally those things spin @ up to 10,000rpm's,,, 1 broken segment can cut/tear like an m16's bullet - it'll tumble inside you !
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Old 06-01-2013, 04:12 PM   #7
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Hollow Clay Brick - Need to Cut


I think I'll try the diamond blade for the circular saw first.

Good to know HomeDepot cuts brick. Nearest one is 30+ miles away though, so I usually go to the local Lowes.

I had ordered the diamond blade for the Coleman angle grinder online. Might have worked except for the fact that it wasn't the same thickness as the standard blade that came with the grinder, which has 4 holes in it corresponding to the tightening holes.

I switched to the standard disc and it worked pretty well, but wore down to nothing cutting through just one side of one block

Appreciate all your prompt helpful responses!
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Old 06-01-2013, 04:17 PM   #8
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Hollow Clay Brick - Need to Cut


Sounds like you were using a masonry blade not a diamond blade if it wore down.
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Old 06-01-2013, 04:19 PM   #9
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itsreallyconc, not using the spacer sounds right. I could see the need for one, but didn't know they were available. Does Lowes carry them?

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Old 06-01-2013, 04:23 PM   #10
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Quote:
Originally Posted by joecaption View Post
Sounds like you were using a masonry blade not a diamond blade if it wore down.
True. Is a masonry blade for cutting through mortar?
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Old 06-01-2013, 04:30 PM   #11
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all of our grinders use a backing plate placed over the blade spindle,,, then the blade then the blade nut,,, the only time we don't use 'em is when we put on cup wheels.

abrasive blades have largely been made irrelevant by diamond blade technology imn-s-hfo we do all out cutting w/dri-diamonds,,, all they're short cuts like yours
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Old 06-01-2013, 04:47 PM   #12
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Originally Posted by itsreallyconc View Post
all of our grinders use a backing plate placed over the blade spindle,,, then the blade then the blade nut,,, the only time we don't use 'em is when we put on cup wheels.

abrasive blades have largely been made irrelevant by diamond blade technology imn-s-hfo we do all out cutting w/dri-diamonds,,, all they're short cuts like yours
I think I have a very cheap angle grinder - that probably cost less than the diamond blade I bought separately.

You've sold me on dry cutting with diamond blades. In your opinion does it make sense to buy a diamond blade for my circular saw and do the job that way, or does this job really call for a good angle grinder?

thanks!
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Old 06-01-2013, 05:01 PM   #13
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Hollow Clay Brick - Need to Cut


call greenie rent a grinder
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Old 06-02-2013, 04:45 AM   #14
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Hollow Clay Brick - Need to Cut


Years ago we used to fill them with sand, as with clay pipes, and cut them with a really sharp chisel, using gentle taps with the hammer. Took a bit of patience, but the diamond blade has sent that method to the history books.

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