I knew you could do this, but your video showed it well, thanks mate

Good demonstration very useful tip to know. Cheers Tony

Tests like this are a great use for 9mm wrenches.

Great tip and I am sure to use this some time in the future. Thanks for the video.

Wow. I never knew that but I had 4 case hardened steel parts to drill an oil hole in and the masonry bit worked like a charm. Took only 5 minutes to do 4 pieces.

Nice demo.You didn't talk us to death like some do.I like that.I have dulled many bits drilling hardened steel.Now I can do it the right way.Thank you and looking forward to more useful demos.

Thank you for Good information...^^ From South Korea..

i did this trick and bam worked like a charm and i tryed just about every thang thank you sir for your expertes

Your lesson helped me a lot! Thanks

Destruction for "positive" purpose is good. please keep your great work continue.

Brilliant bit of information 👌 Thank you for sharing 👍

Good job Chief!👍👍

Thanks for this! Was drilling hardened steel yesterday and dulled too many bits. Next time I'll know what to do!

Great info. Your attention to detail is what makes the difference between success and failure. Following your procedure also gives (most importantly) repeatable results,,,,the best kind of results. I have a blind hole in a piece of turning stock that inadvertently became ‘work hardened’ through the use of a cheap drill. I now have a viable and repeatable method to drill past this zone in my work piece. Thanks

I really enjoyed this video and would love to have your thrift store in my town with 50 cent new craftsman wrenches and 5$ diamond wheels~!! I have always wanted to try this so I think I will now after seeing your way of doing it.

Worked like a charm Thanks for the heads up! My first try I had it too pointed but once I flattened it out just like he said I was drilling holes :)

Congratulations ! Very usefull, thank you for your excellent explanations.

GREAT JOB

thank you very much. it helped me a lot

Amazing. Will try it to drill out a stuck bit in impact driver. Edit: used an unsharpened masonry to drill. It worked well and my drill operational again.

Thank you that awesome

Can you do a video on indicating work pieces on OD and ID for the cnc lathe?

Be aware that when using carbide tooling on the mill or lathe you either do or do not use cutting fluid or coolant,the reason is this if you use oil/coolant(milk) you have to flood the part not just add it here and there because the carbide is so hard it cannot take heat stress ie sudden cooling ,it will shatter. No lube or coolant can be done easily at reduced speed,in the case of the drill i would add the oil to the top of the drill shank to allow a constant feed down the drill as the oil gets closer to the carbide the steel shank will heat the oil up to match the carbide temperature,use a brush to add the oil as it holds oil on the bristles as a reservoir. I've ruined plenty of cutting tools on the mill and lathe by not realising carbide is happy dry cutting,just don't thermally shock it or it's done for.

Thanks, I've been know to break taps and not have a carbide bit to drill them out. Masonry bits are widely available and cheap. I'm not as steady as you are so I'll try sharpening a masonry bit on my Deckle knock off tool grinder. You should have more subscribers!

nice tip

that under cut could be made with the drill held in a vice and use a small diamond wheel on a dremel.

Just wondering what rpms was the drill turning at. I drilled hard steel last week with a masonary bit , but the package said good for steel too. Able to do rebar, I guess. Any way, I had 4, 3/16 holes to drill though 1 1/8 diameter hard steel. It worked but took about 2 plus hours. With a hand drill. Could not get the piece in a drill press. I used rapid tap oil. Masonary bits work. But in my case it was hard pushing. Thanks for the video.

Great idea! I wonder if you could you do the same thing with a Drill Doctor? Drill Doctor doesn't recommend sharpening drills smaller than 1/4" but for larger drills it works reasonably well. I have a broken 1/4" tap that I need to remove so I think I'll try sharpening a 3/16" masonry drill even though it's not recommended, then see how it works.

Great video! Could you share the specs of the diamond wheel you bought of ebay? Thanks! Fabian

my wife watched this with me. She said she needed to purchase that bit from you because I am hardheaded.

Now they make "multi-material" bits like this with slightly better geometry for cutting steel. Some manufacturers recommend high as possible rpm when drilling steel.

Would this principle work on the bigger masonry bits like 1/2 and 3/4 and so on? Do you calculate the RPM for these as 80x4/drill dia or do you use other numbers?

100% - but will this work for enlarging and existing hardened motorcycle sprocket 8.5 mm bolt hole to 10.5 mm? Cobalt drills aren't supposed to work as the central web isn't big enough so they will likely grab and snap; and even if not the sides of the cutting faces in contact will just blunt after one or two holes?

What is the name of the wheel you used ? cheers

the diamond wheel or a green aluminium oxide grinding wheel for carbide.

I've used a few HHS jebbsen bit and some other bits but nothing seems to make a hole bits keep braking.

I was intrigued until you said oopsie

Your demonstration is very informative.. I've yet to try it myself. Thank you. Oh, one question. Does it work with a smaller 1/8 drill bit?

Would drop forged be considered hardened steel?

What rpm did you use?

can you tell how you get the high end diamond wheel for $5 on where of Facebook? thanks for sharing.

What oil do you use?

For us lesser mortals, would you consider doing this demo with a hand drill (for those of us who are drill press-less).

Try it sometimes with an old file. They are very hard. Useful information

A spanner isn't really hardened steel - it may be tough but not hard

to be honest you need better camera skills for this video because it could be one of THE MOST IMPORTANT VIDEOS on youtube. I thought that you needed a diamond wheel in order to be able to grind carbide masonry bits

I wish i could find a $80 diamond wheel for $5. hahaha. Believe me, you didn't need cutting oil.

"Masonry" only has one "a" not two. You repeatedly add an extra "a" between the "n" and the "r". Thanks for explaining how to sharpen an inexpensive carbide bit to drill hardened steel. Agree it would be easier to see with a larger bit. Maybe next time...

3/16" is 0.1875", not 0.875" as stated in the vid. Big difference. Just an oops, but not everyone will know that.

You can also use a dremel type tool with cheap diamond wheels....About 50 cents per blade: kzfaq.info/get/bejne/mMCFeNZkq7LMhaM.html

May - son - re

Pet Peeve: it's may-son-ree, not mays-son-ary

hmm. home made swiss army knife with proper tools on it looks rather doable now

Nice video…this is nothing new…solid carbide bits are available at a price…I don’t understand why carbide tipped bits for cutting through steel are not manufactured as standard….probably because they’d last too long..lol

15 seconds in you say 3/16" is .875....3/16"is actually .1875

Great demonstration. By the way, the Egyptians built everything they ever built with copper tools, which proves the point, you can cut hard stuff with soft tools if you have enough time, are patient, and you put a good point on the tool. By the way, , you are guilty of a pronunciation that I used to be guilty of, until someone corrected me. The word is pronounced MASON RI not MASON ARY. There is no A in there. OK yell at me, but you will be a better person. Oh, and slaves didn't build the pyramids. Egyptian Patriots did. They were proud to work on such a big national project. It was also off season work and a way to make money when they couldn't farm. It was like their Moon Shot. With the pharoah buried in the pyramid, their future and security would be guaranteed. That's a bunch of information you didn't ask for. That could also explain their persistence working with dull tools. I used to be a teacher. Sorry! Video Liked!!