What kind of drill bit is this?

Found this in an old tool bag. Not mine and no clue where it came from. What kind of bit is this and what’s it for?

I’m just seeing a drill bit. Maybe it’s different in person

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Diametrically opposed, dual surface, rotary aperture creation device.

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That’s actually not a drill bit, it is called a pocket knife.
Joe

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Alright jokers… it has a raised “bump” all the way down the cutting channel I haven’t seen before. (Most) engineers don’t just throw stuff on other stuff Willy nilly like.

I have a number of the raised edge bits. They are metal bits with supposedly less drag than the solid ones. They do seem to cut a little faster and last a little longer before they need sharpening but that’s am impression nothing I have ever tried to measure.

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This one has nylon in it. Doesn’t mean whoever was using before I accidentally stole it was using it the right way. Lol

I’m gonna chuck it into the drill press and see how well it cuts steel angle. I may need it soon.

Haha, Ok I stand corrected. That is different and I don’t know what it is.
What I want to know is what is the book from the other thread?
Joe

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Nice, Thanks

It’s a masonry bit. For drilling bricks and tiles

that is what i looked like to me, they do have more of a sharp corner with a ridge…

All my masonry bits have a larger tip on them than the drill bit body. I didn’t see that on this bit. The nylon insert is different though, didn’t pick up on that before. That may make it something else. IDK

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The one time I feel confident enough to respond. It’s appears to be to be just standard HSS (high speed steel)
Jobber drill with 118 deg point,with a black oxide finish. for drilling mild carbon steel . The nylon on the outside is put on the Drill by tool grinder, to protect the cutting edges. The Mason’s drill have a carbide tip made for a hammer drill.

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What are you drill bit Rain Man?! Jk. I trust that answer if for no other reason it sounds better than the rest.

You should respond more often! Thanks @Roaddogtx

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Well I wouldn’t call myself a professional pressure washer yet, but in a former life I was a machinists, for about 20 years, so I’ve drilled a few holes.
Any questions about cutting metal I’ll throw out my .02 , and help when I can, but all else I’ll just look and read. Y’all are the pros here. I’ll learn from everyone else’s mistakes.

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It’s a diamond coated laser guided magnesium carbide bit. It’s what the bomb squad use for drilling holes into suspicious packages so they can insert their endoscope.

How’s that :slight_smile:

This is a spiral cut bionic ham.