I have some concrete repair to do and I am considering using a Skill HD77
worm gear circular saw and diamond blade to remove the old concrete. Does
this seem like a good approach? Any experience with this approach. Anyone
have alternative ideas? I don't won't to go the rental approach because I
have a lot of small applications that I will be doing over many weekends and
don't won't the expense of repeated rentals.
I assume that I will have to supplement the sawing process with hand cold
chisel work to completely remove the concrete, is that correct?
that saw will work fine for cutting grooves into the concrete. It wont cut all
the way through unless you have thin concrete. we usually cut the concrete as
deep as the saw will go then we use a hammer gun to break out the section.
make sure you use some water on the blade unless you like to have a lot of
dust. they make dry and wet diamond blades. You can use water on the dry
blades just to keep the dut down.
I would go to harbor freight, get the diamond blades, and an corded saw. I
would not use an good tool for cutting concrete. Spend as little as you can
on the saw. This saw should be treated as disposable.
You will need gfci protection cause you need to keep water on the diamond
bit. Even if they say "dry". The blades last a lot longer if you use some
As others have said your just going to get part way through. (usually) and
then you will have to break out the rest. Sledge hammer works ok for this.
Consider a roto hammer/hammer drill for the removal.
Depends on how much you will be cutting. Keep in mind the typical saw is
made to cut a couple of 2 x 4's and maybe a sheet of plywood and then it
sits for a while to stay cool. If you are cutting a long strip you can burn
out a saw in a few feet to maybe 20 feet. Give it a rest requently. I've
seen two saw go in one day from abuse. One did maybe 15 feet, the other a
bit more, but the idiot using them never stopped ntil it was too late.
If you have little luck with your saw, talk tot he rental place. Explain
why you don't want to rent, but would be willing to talk if you could get
some sort of discount for multiple uses. This works better with the local
hardware store than Home Depot.
Another advantage of renting. The big machines have larger blades for
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