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What are these reamers for? (stubby reamers with Morse taper shanks)

paroikoi

Aluminum
Joined
Oct 2, 2014
Location
Jonesboro, AR, USA
Hello. These two reamers came along with some machining stuff I bought a while back. Will you experts please let me know what these might best be used for? I'm trying to decide if I should keep or sell them. The shanks appear to be Morse Taper #2, or at least they fit snugly in my 10EE tail stock quill. Surely they're made for a different application, though, since the flats can't be used to prevent them from rotating by the stops in the quill (since the reamers are so short).

PXL_20210905_193834353.jpg

Here are more photos:

stub reamers - Google Photos

Thanks in advance,
Josh
 

L Vanice

Diamond
Joined
Feb 8, 2006
Location
Fort Wayne, IN
If there is a hole through the center, they are counterbores. You took a bunch of pictures, but all of the side view, so no way to tell if they have a hole.

Larry
 

Illinoyance

Stainless
Joined
Aug 24, 2015
Larry was quicker than I was. Shanks are stub Morse taper. Counterbores have a square end, reamers have a chamfer.
 

4GSR

Diamond
Joined
Jan 25, 2005
Location
Victoria, Texas, USA
Skully-Jones used to make holders that held these as well as counter bores with this short taper shank. There may be a couple of other companies that made them too. IDK. This stuff is pretty much obsolete unless you can find a holder. The adapter holder usually has a full morse taper shank on them. They do appear in epay once in a while. Ken
 

johnoder

Diamond
Joined
Jul 16, 2004
Location
Houston, TX USA
I have a pile new, but different - cross hole thru straight shank. They turned out to be production reamers for lifter bores in Mopar V8 cylinder blocks
 

gbent

Diamond
Joined
Mar 14, 2005
Location
Kansas
There is important information on the shanks. We could help you a lot more if you would simply list the information on the shank.
 

paroikoi

Aluminum
Joined
Oct 2, 2014
Location
Jonesboro, AR, USA
There is important information on the shanks. We could help you a lot more if you would simply list the information on the shank.

That's why I took all the photos, as mentioned above. You're right, though, that I should have transcribed it here. Here goes:

930-27205-66 BCCO
M2 DIA. .9998
DHM282-6 ID514566
 

gbent

Diamond
Joined
Mar 14, 2005
Location
Kansas
Barber Colman Company, perhaps? The 4 digit size suggests they are just standard reamers with a short shank, probably for use in a radial arm drill with an adapter that allows changing without extending the quill.
 








 
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