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Old 10-08-2020, 10:51 AM
threepiece threepiece is offline
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Default Strange Counterbore

It secures in a tapered spindle but I can’t imagine what looks to be an adjusting nut on the end is for. Any of you fellows know?
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With the amount of energy that is being consumed I expect most people on earth should be living in Utopia. And now this?

It started hitting the fan in the 1950's

A technologically advanced society would teach their children how to start a fire by rubbing two sticks together before teaching them how to use a lighter.

If you are not having fun then you are doing it wrong.
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Old 10-08-2020, 11:03 AM
greywynd's Avatar
greywynd greywynd is offline
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Interchangeable pilot?

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Old 10-08-2020, 12:08 PM
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digger doug digger doug is offline
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I believe it's for the eject part of the Morse taper.
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Old 10-08-2020, 02:30 PM
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LKeithR LKeithR is offline there a prize?
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Originally Posted by greywynd View Post
...Interchangeable pilot?
I doubt it. Interchangeable pilots are usually held in with a simple setscrew in the body. If that part sticking out the end were meant to retain the pilot then the counter bore would have to be hollow and the pilot would be threaded. Highly unlikely.

Originally Posted by digger doug View Post
I believe it's for the eject part of the Morse taper.
That would normally only require a short chunky little stub. What you see there is pretty long and spindly. If the counterbore is threaded then that piece sticking out might be the remains of some kind of jury-rigged drawbar...

Measure twice and cut once...or...wait, was that the other way around?
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Old 10-12-2020, 12:33 PM
Will I Am Will I Am is offline
Join Date: Jan 2018
Location: Niagara Falls
Posts: 3

Maybe a Browne & Sharpe taper with a broken draw bar?
Cheers Will
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