How to drill a opening in tough concrete?


I got an rich concrete drill bit (3/16) from Home Depot
to attempt to drill 6 holes on my house basement concrete floor. However by
the third hole, the bit is completely gone.

The head even appear
a tiny melted by heat. What’s the right mode to drill on
concrete?

Concrete Drill



Tags: , .
April 28, 2010 at 05:46

18 Comments




18 Comments on How to drill a opening in tough concrete? »

April 28, 2010

By metcalfmaintenance1

You have to use water to keep the bit cool.

Get a water bottle and continuously squirt water around the drill bit and into the hole as your drill.

You can easily do that with a house hold heavy drill. Use a concret bit. Preferably a

Did you put some liquid on the surface before drilling?
Ideally, after every few seconds, one should keep adding some lubricant and stop at intervals.

By NEWBEE1

You can try this link for information:

http://search. Yahoo.com/bin/search?fr=ybr_sbc&p=drilling%20concrete

Good Luck

By Cosmo

If you have a masonry bit, your either pushing too hard or allowing the bit to get too hot.

A drop of oil while drilling would help.

Also,you should have a Hammer Drill. This “hammering” action is great for concrete. Rent a hammer drill, grab some oil and a new bit and try again.

By ettavix

Use water as a coolent. . . Or work slower. . Give breaks in between. . . Call a concrete worker. . .

By solo

Too much pressure or too much drilling in a short time will cause the tip to overheat and lose its ‘temper’ (i. E.

Its strength) then it will simply just wear out easily.

Best thing is to drill with less pressure and take breaks – you can cool it with water but i never found this too practical on such a small drill bit (you could try forming a dam out of clay around the hole and filling with water if you really want to try).

Good luck

Sounds like you dont have a hammer action drill, if you do then this shouldnt happen , when drilling raise the drill bit from the hole to clear the drill flutes, after that I would suggest some water.

By Erin W

maybe see if you can use a tougher bit on the drill

By frog

Sounds like you have reinforced concrete flooring.

If it’s a masonry bit, use a thin oil as lubrication, this is far better than water, which will itself get hot and evaporate.

The oil has a much lower boiling point.

It also helps if your drill has a hammer action.

take your time on drilling the whole. . . When I drilled in my basement concrete floor the only thing I did was take my time. .

And when the bit seems to get over heated I just wet it. .

And then went back to work. .

But I did have two Concrete Drill Bits too. . Becareful cause you can also break the bit in the floor too. . Cause that is what happened to me. . LOL. . Good luck. .

Any other questions just email me
amanda

u need a hammer drill, u can rent one.

modified- the person asking the question did state a 3/16″ drill bit! i would say that was light duty!

lic. Gen. Contractor

Hammer drills are OK for light duty work. . 1/4″ and less

For old, really hard concrete, you need a rotary hammer. .

HD rents Bosch SDS rotary hammers. .

The SDS bits are much tougher

If you used a regular electric drill for this operation, that’s probably why you had a tough time. Go back to Home Depot and rent a Roto-Hammer, although any rental yard will carry one for a comparably cheap cost.

The friction caused by the down pressure of your arm burned your bit.

A Roto Hammer has a jackhammer effect which causes less friction on the cutting edge of your bit. By the way, get another bit, too if there is no carbide left on your present bit.

You may be hitting rebar or wire mesh that is embedded into the concrete. That would wreck the bit also.

Just an additional tip, Try to use a lower rpm and like the others “be patient”.

HAMMER DRILL

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