Kundenbewertungen für VEVOR Kernbohrer Bohrkrone φ 64 mm 241 mm Bohrtiefe, M16 Innengewinde, Trocken-Diamantkernbohrer Kernlochbohrer mit 3 Adaptern Pilotbohrer Sechskantschlüssel für Stahlbeton Ziegel Mauerwerk

I bought 5 inch, but the actual diameter was 4.5. I don't know why. I drilled 2 holes in foundation strip with deep 22 inches.

Valutazione ottima ma non eccellente. Da migliorare la punta di centraggio che dovrebbe essere più rigida per iniziare il foro con più precisione, perché a causa della rotazione tende a ruotare più ampiamente rispetto al fulcro. La qualità della tazza è buona. Provato sui forati.

Item are very good and really good quality but it doesn't come with an extender for it or a bit. Now I have to go look for one

It works great drilled in some posts holes into bedrock. Can put it in your normal drill, I use that hammer drill which is not recommended for coring holes.

Aangeschaft om gaten voor spots te boren in mijn oprit tegels. Is goed gegaan. Mooi dat er drie aansluitingen bij zitten

Bit worked very well with Bosch hammer drill!

It worked great

Make sure the adapters compatible with your drill.

This core bit works well and is a great value. As others have said, the center drill is too short but that only affects starting the hole. Once started, the center drill is not necessary. I drilled through a 10" concrete wall, 2" at a time, using a chisel periodically to break off and remove the plug to keep the bit from binding. Definitely use a corded drill.

I bought the 6" drill bit because the HVAC and cement guys told me they didn't have a way to drill through my storm shelter to get air flow. I bought this without any idea what I was doing, and I was pleasantly surprised. It took some time, but I drilled a perfect hole through 10" of concrete with nothing but a Milwaukee hammer drill (which was just as impressive). I don't think they're made to go through rebar, but they eventually went though a couple rods that were in the way as well. I wouldn't be scared to use these core bits on any project.