🔩 DEWALT Industrial Cobalt Pilot Bit DWA1240 Review

Yes I love these beats. Mostly stainless steel drilling, with Tap Magic Fluid. HSS 5/16" drill bits can drill 4-5 holes in 1/4" stainless steel before dulling. So far I've drilled about 16 and about 12 inches of the entire rod on the lathe and the Dewalt 5/16 inch drill bit is still sharp. They also drill faster than HSS.

They are advertised as heavy duty and capable of drilling through steel. I bought these to drill out 2 bolts from an intake manifold gasket repair. These are not hardened steel bolts, but ordinary aluminum bolts. These parts got hot quickly, and yes, they were lubricated. 2 screws broke after a few minutes of drilling. Another burst at the base. Total garbage. I wouldn't recommend it for anything heavy.

If it wasn't for the pretty packaging I would give these bits a 1. Stainless steel painful even with pro gear and new drill wax. The stainless steel didn't damage the bits, which is good. But at the same time little progress on steel. However, the crowd that gathers during the time you work will admire this case.

I just received these yesterday and used them for the first time today. Not very impressed that the 1/8" bit after drilling steel pipe broke after drilling about 20 holes. I wonder if there is a guarantee on them. They aren't much better than the titanium drills I've used in the past. I really like how the case and drill bits look. I almost didn't want to use them because they were so pretty. Maybe I shouldn't have used them at all.

Sometimes I need to drill a few holes in metal to make antique restoration parts. For example custom bracket here, hidden bracket there. Try using the regular drill bits that come with the drill, or something like "1000 tools in a box of 10". Forget they turn to pulp, they are not designed for metal, even if it says so. I made a mess and started lighting the oil and stuff like that. So I asked a friend who makes fancy doors what he does with all the holes he has to drill in metal. So what I…

I tried using three bits up to 3/16" to pierce a cheap 1/8" Tawain knife blade, and they only have a tiny mark on the blade. I was shocked and very disappointed considering this set cost $30! I used a drill press, lube and low speed and drilled until my hand got tired. Nothing. I only need two small (3/16 inch) holes in the blade of this knife and bought this kit for that purpose. I cannot recommend this set to anyone and will definitely not spend my money on it again.

Bought for some work on a single axle trailer that was converted from a metal grid deck to a sheathing. To attach the skin we had to drill a few holes in the 1/4" steel L-beams and we had to do a little prep to get the job done. We took them and they did a great job. We did worked on this project for several days.and not a single problem and all the bits stayed sharp and working after the job was done.I've used them on several other projects since then without breaking or dulling.they certainly

Received this on my Revain wish list as a Christmas present. These are by far the BEST drill bits I've ever had. I've used them for auto work (including drilling out broken bolts on an engine and drilling new bolt holes!), on the porch, use them for roofing, electrical and other applications. You name it, my drill was there. In 8 months of use I've only broken one of the tiny ones (and I take some of the blame, I drilled something at an angle and it broke). Result; fantastic exercises…