Re: carbide bits only for drilling concrete? I only managed to make a hole about 4 mm deep. Use cutting oil will also help, it makes the bit “bite” better, and keeps it cooler so the edge doesn’t lose its hardness.
www.canadiantire.ca Buy these bits here; …Mastercraft 29 piece HSS Drill Bit Set – Carbide Tipped Masonry Bit Canadian Tire
I have used cheapo canadian tires bits for years and never had a problem. Craftsman tools.there was a guy at a local hardware store that had told me to go get carbide bits at brafasco. I got a hole about 5 mm deep, but wider, because of the bigger drill. I am concerned that even those may not work. I mounted a hood fan this weekend and used a carbide tip no name cheapo bit, and it took around 2 minutes to go through the tile.
If you’re drilling through real stone, you might be better off with a masonry/hammer drill bit – with or without a percussive drill. Please select your store to see pricing. Guide template 2-1/8 bi metal hole saw 1″ bi metal hole. .. Bosstools, there a great store with good service. Larger holes using professional hole saws use a 7/16″ hex shank which requires a 1/2″ drill chuck. And the percussion drill (w/ adjustable grip arm) makes it easier to hold steady when punching trough hard steel.
Re: carbide bits only for drilling concrete? Can the piece you are trying to drill be brought to my shop? I have no idea how hard grade 7 would be. Most electric drills run too fast for drilling a decent size hole in metal. You can put a bit of oil on the tip every little bit to help also. If it’s marble, no hammer drill as it will likely split on any veins. I wouldn’t go anywhere near these tiles with a hammer drill for fear of cracking them. The key is to go slow, use lots of water, medium pressure and let the diamonds take the material out. These are best for sheet metal or other thin materials. They also do a very nice job with plastics. Go to your local muffler shop with a 12pk of beverage with your vise grip and an appropriate sized nut. They are sold at machinery shows and on the internet.
[Princess Auto] PA
Drill dropped right through it with no trouble at all, using a hand-held 3/8 air drill. Rainchecks unavailable on all 299# products. Tool chest not included with 400-pc set.
Canadian Tire Mastercraft Pcs Drill Bit Set Unboxing