What the heck is this cutter for?

[ErichKeane]

I got a horizontal milling attachment for my Bridgeport clone, so I picked up some cutters on eBay in a box of randoms.

Most are obviously straight or V cutters of some sort, but this was an odd one! I was wondering if anyone had an idea?

I hope the 2nd picture is clear enough, it has a semicircle out of the flat on the right, plus a step down on the left? I can't imagine what it is for!

 

[matthewsx]

Specialized for making a groove? Could have been custom ground for a specific job, set it up and see what it cuts....

John

 

[davidpbest]

Might be a deframulator cutter.

 

[matthewsx]

Like this?

 

[matthewsx]

Or this?

Stuff that was never made, but you thought it was...

I'm in between connecting the dots on some things, or has everything been done with tools already, besides automating everything? For example, I didn't know about automatic tire inflation, until I got into trucking, then ended up tearing it apart to replace a valve underneath, which they...

www.garagejournal.com

 

[matthewsx]

Or maybe this reference from my cousin's city.

Cranford Historic Preservation Advisory Board

 

[b4autodark]

Keyway cutter most likely. There was a prehistoric one in the old machine shop at the Minneapolis Water Works when I worked there, it never made the trip to the new shop when it was built. A lot of good old "stuff" was scrapped. A shame.

 

[ErichKeane]

Keyway cutter most likely. There was a prehistoric one in the old machine shop at the Minneapolis Water Works when I worked there, it never made the trip to the new shop when it was built. A lot of good old "stuff" was scrapped. A shame.

What sort of keyway would you cut with this? Its just such a strange shape...

 

[Eddyde]

Custom cutter for 'We'll probably never know.

 

[Provincial]

It is a profile cutter for a specific job.