what is this tool

[charlie_k]

when i first saw it i thought it was a plumb bob. but now i'm not so sure. i've had it at least 25 years but i never used it or am willing to toss it because some day it might come in handy to beat into a hole in something to make it bigger

 

[xela456]

thats a carbide inset from either an asphault grinder or a trencher
EXTREMELY hard!
grind it down to a fine point and it would make a great center punch

 

[billwood437]

looks like a tooth for a drill head or something like that.

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[hamiltontrailerr]

As previously stated, it's a carbide insert for a rocksaw, drilling head or something related to digging in high abrasive, hard stuff

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[charlie_k]

thanks, i can live with that

 

[KnurledNut]

Similar style carbide bits are used in cutting heads for underground mining.

 

[L.Cheapo]

Didn't AvE do some friction drilling with one of those a while back?

 

[kspwski]

Yep, carbide tipped tooth for a rockwheel or trencher chain. Used for cutting trenches or slots in hard stuff.

I think the flow drilling that AvE did was with a tungsten alloy of some kind, not carbide.

 

[Bighead38]

I've changed thousands of those on big augers, "hole saw" shaped drills, etc. I remember on one job we hit rock that was insanely hard. 30 -60 seconds of drilling and the teeth were gone. I hated when they got so hot that they wouldn't come out or when ran to long you couldn't get the tool in the groove to hammer them out.

 

[Michael_in_DE]

We had a few hundred of them on the pavement rippers we sold years ago. That is kind of an expensive piece.