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View Full Version : What kind of tool is this?



mattthegamer463
12-13-2016, 09:28 AM
Hey guys, I bought a box of old reamers for $5 from a local toolguy on Kijiji, I was there for a toolbox and took a look around his junk. These were in the box;

http://img.photobucket.com/albums/v321/mattthegamer463/20161109_213015.jpg (http://smg.photobucket.com/user/mattthegamer463/media/20161109_213015.jpg.html)

My best guess is they're a type of indexable drill bit, or a boring tool? The hole at the end seems to be designed to hold a tool bit, but there's no apparent way to fasten it in. No set screws or anything. I think its a MT1 on the end.

In any case, I'm curious what they're for and what they would have been used for if they are a specialty tool. Probably won't find a use for them, good shanks for something maybe.

QSIMDO
12-13-2016, 09:36 AM
Are those gun drills?

Toolguy
12-13-2016, 09:52 AM
Not gun drills. I wonder if they went to a Moore jig bore?

Tim Clarke
12-13-2016, 10:00 AM
Pilots for a Black and Decker valve seat grinder

mattthegamer463
12-13-2016, 10:10 AM
Pilots for a Black and Decker valve seat grinder

You're absolutely right. Looks like they're meant to hold a small round grinding stone.

Thanks for the help guys, nice catch Tim. I guess I can see how they made it into the junk reamer box.

A.K. Boomer
12-13-2016, 10:25 AM
Good one Tim --- damn i should have had that but was drawing a blank because they look so different from the ones I grew up with which I believe were sioux...

got fixated trying to figure out what those spirals are for... ?

Tim Clarke
12-13-2016, 10:53 PM
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got fixated trying to figure out what those spirals are for... ?[/QUOTE]

The stone carriers had a bronze bushing that went over the pilot, maybe the grooves were a place for the inevitable grit to go. I think the later stone carriers had ball bearings, kinda like the Sioux you were talking about.