“i just finished using my new 5 inch core drill with watering adaptor ,it worked like a champ !! even bored right thru a piece of 5/8 rebar without a hiccup ! i am very happy very nice people to deal with ..thanks Mark Hollister ( Kentucky)”
“Upon request I update my review of two weeks ago. I received a new bit last week to end the unexpected release from the adapter. When I order the next core bit for another job I shall let everyone know how all went. I am happy with the E Diamond response to my problem. Other discs from the company previously purchased worked well.”
“I had two 4” holes to drill though a twenty year old 5” concrete floor. A rental tool would have cost me 2/3 the price of the EDiamond 4” core drill and the 1/2 drill adaptor. That’s a no brainer for me. The core drill arrived two days after I ordered it from EDiamond and even with some shipping was a little less than the Amazon prime price.
As some of the other reviewers suggested I cut a 4” hole though a 2x6 with a standard hole saw a then stood on the 2x6 to get the hole started. A small stream of water flowing on the coring bit kept it cool and flushed during the process. It took me less than an hour to core both holes and the bit still looks brand new. The 1/2 Milwaukee drill I used was probably a little underpowered for the job and got hot but with a few cool down breaks it worked fine.
All in all I was very pleased with the core drill and the adaptor and highly recommend them.”
“So though these tools are made in China they seem to be pretty well made. I did have to provide a pair of O-rings. But that said it allows you to use your SDS MAX hammer drill with diamond core drills. Dry or with the water swivel you should be able to get things done. All in it is far cheaper than a dedicated core drill motor with water, like 5 to 1 cheaper. So highly recommended.”
“I used a 2 1/2" core bit to drill holes for railing posts in granite (and other) boulders. It was a bear doing this with a hand-held drill, but it worked with only occasional grabbing. I used two bits to drill 13 holes four to six inches deep. It worked, but there must be a better way! No issues with the core bits themselves - I was impressed.”
