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

    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

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    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

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    Larry was quicker than I was. Shanks are stub Morse taper. Counterbores have a square end, reamers have a chamfer.

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    Quote Originally Posted by L Vanice View Post
    You took a bunch of pictures, but all of the side view, so no way to tell if they have a hole.

    Larry
    I never said I was smart...

    pxl_20210905_211040100.jpg
    pxl_20210905_211047810.jpg

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    Note the tang has nothing to do with torque it is just to help eject the tool.
    Bill D

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    I’m pretty sure these are taper pipe reamers. You would use them before tapping

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    I just checked, and they are not tapered.

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    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

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    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

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    Thanks, all.

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    There is important information on the shanks. We could help you a lot more if you would simply list the information on the shank.

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    Quote Originally Posted by gbent View Post
    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

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    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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    Quote Originally Posted by gbent View Post
    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.
    That would make sense. Thanks for the explanation.


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