Reviews for VEVOR Dry Diamond Core Drill 4.5"/114mm Dia. Hole Cutter for Concrete Masonry

MC PETTI

This worked really well, BUT!

This worked really well drilling through the side of a concrete storm sewer. BUT! I had to buy a $240 hammer drill. This will not work in standard 3 tooth chuck of the hammer drill I already had.

See More See Less

Helpful Sending feedback... Thank you for your feedback. 1 people found this helpful

GW621

Mr

I have not yet used this bit, but after reading some of the reviews, I felt a comment was in order. People are complaining about the pilot bit, but if it is used correctly, it is a huge help. Note the use of the term "pilot bit". That means you need a pilot hole. The proper way to use it is to remove the pilot bit from the mandrel and insert it by itself, into a hammer drill and use that to drill your pilot hole. Then you install it back into the mandrel and screw that into the coring bit. The coring bit should be used only with rotary motion, not hammering, unless you're fine with huge breakout on the back of your hole. I will write a follow up review or update this one after I actually use it, but I wanted to point out the error in some of the reviews I've read.

See More See Less

Helpful Sending feedback... Thank you for your feedback. 1 people found this helpful

DennisS

Worth the money

Overall a pretty good drill bit. I needed to drill five - 2 inch holes through a 5 inch thick reinforced concrete floor. After starting the pilot hole, it was tough to get the large bit started due to the size. I found starting more at a slight angle, then gradually moving to a straight up angle made it easier. It is not an easy hole to drill, but this drill bit works well. The only negative is the set screws for these pilot drill bits will vibrate loose causing the main bit to really wobble badly. I had to retightened the bit often. And.. Definitely use water. Much faster, cleaner, and no dust. Well worth the money compared to hiring others or renting equipment.

See More See Less

Helpful Sending feedback... Thank you for your feedback. 0 people found this helpful

Pamela S Cooper

It worked

Was really skeptical of this due to price. I was able to core 2 holes full depth 14 inches in a poured solid concrete and block wall. Went slow with variable speed wet angle grinder with lots of water. Bit looks fine and ready for some more.

See More See Less

Helpful Sending feedback... Thank you for your feedback. 0 people found this helpful

Regular Joe

"" Worked Extremely Well ""

While pouring a new garage floor, I decided to stub in for a future washer and dryer rather than keeping it in the basement. Bought the 2 1/2" core drill to safely run 2'' pipe through an 8' basement wall. I had my doubts, but thought I'd by this set. I used a 1/2 inch Skill, hammer drill and it was a chore, but very doable. Saved me a $100 from the local tool rental.The center drill is pretty much worthless, too much flop to get a good starting cut. I drilled a 2 1/2'' hole in a scrap masonite and used it as a guide to get each hole started.Pro's..... It will get the job done.Cons...... You can skip the gym that day.... It's a workout. LOL

See More See Less

Helpful Sending feedback... Thank you for your feedback. 0 people found this helpful

The Baum Mom

Works as advertised

Drilled 3 holes in standard patio. Worked as expected. The drill bit was useless. Made a would jig to align boring tool instead of using the drill bit.

See More See Less

Helpful Sending feedback... Thank you for your feedback. 0 people found this helpful

Brian Thomsen

Did the job

Worked great, only drilled one hole so far but it worked great

See More See Less

Helpful Sending feedback... Thank you for your feedback. 0 people found this helpful

Chad Lincoln

Gets the Job Done

As others have mentioned, the pilot is pretty useless and failed shortly into my core. However, this bit got through my 8” solid concrete foundation wall (took about 30 minutes). Not sure if it would be good for any future work as it slowed down towards the end, but it paid for itself on the one use.

See More See Less

Helpful Sending feedback... Thank you for your feedback. 0 people found this helpful

Tunaoue

Heavy Cylindrical Boring

Had to bore a breather hole for tankless water heater through 8” of solid concrete. Drilling horizontally about eye-level, this is a heavy boring tool, difficult to handle, so I built a wood fixture to help target and hold the weight. I think the bit can be used wet or dry, in my case dry cutting was my only option. Lot of DUST, so wear a breather mask and eye protection. I wore ear plugs too because it was an enclosed shed. The task took a week, about 20-25 hours of actual powering (slowly) through about an inch per day. If the drill angle is a tiny bit off, the whole thing BINDS UP and stalls the drill. I could stand and push the drill with my back leg braced agains the rear wall for maybe 10 minutes at a time before I succumbed to the fatigue. Rest for 5 - 10 minutes, and resume the attack. You’ll need patience and persistence because (in my case) it was literally a long, . . . hard, . . . grind.If your project is straight down into a concrete floor, your results will probably be more efficient.

See More See Less

Helpful Sending feedback... Thank you for your feedback. 0 people found this helpful

G. T. Bauer

Works

I bought this with the intention of drilling a single hole through a hollow concrete block for a dryer vent. For that purpose, it worked like a charm. I was able to get through the front half off the block before burning out my cheap 20 year old drill. Another better drill finished the back hole.I saw one review that said the drill bit was too short. That was not true for me.I cannot speak to the longevity of the bit, but for the single hole I needed, this was a great value.

See More See Less

Helpful Sending feedback... Thank you for your feedback. 0 people found this helpful

Customer Reviews for VEVOR Dry Diamond Core Drill 4.5"/114mm Dia. Hole Cutter for Concrete Masonry

Customer Reviews

Ratings by Features

People Who Bought This Item Also Bought