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Thread: Homemade Chamber Reamer

  1. #1
    Gunco Rookie Randy803's Avatar
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    Default Homemade Chamber Reamer

    Here is a Chamber reamer I made for a project, it worked perfectly. I have made several over the years and it is pretty easy and quick...
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    Gunco Veteran Viper Dude's Avatar
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    Cool chamber reamer !!! How did you harden it ???

    VD

  3. #3
    Gunco Rookie Randy803's Avatar
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    Quote Originally Posted by Viper Dude View Post
    Cool chamber reamer !!! How did you harden it ???

    VD
    Its O1 Tool steel so I chucked it up in my drill press and rotated it slowly under power while applying the torch (I run a propane\oxygen torch) until it reached the sparkle/glittering temp then while still spinning I raised a mason jar of old oil (The older and darker the oil the better, more carbon!)up to it to quench. No need to temper at all, then I touch the edges with a light India stoning and run the power buffer over it a little. I find the harder they are the better they cut and longer they last, just don't drop it on the floor it will break! I have not broken one while reaming a barrel but I have dropped a few and broken them.

    I also cut a 60degree rear for a live center so i can use the tail stock of the lathe to apply forward pressure.

    I am getting many uses out of these before they start to dull beyond use ,more than enough for me. I used to cut D style reamers (As pictured) but they are good for one maybe two barrels but the 3 flute last awhile longer and cut better and the time to make them is about the same. I might move to a 4 flute eventually but why fix it if it ain't broke right?
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    Indian Admin Winn R's Avatar
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    What machining processes are involved to cut the reamer. Would you start with the simpler "d" design first?

    And what source do you use for chamber dimensions?
    There is no nonsense so errant that it cannot be made the creed of the vast majority by adequate governmental action. -- Bertrand Russell


    "Never attribute to malice that which can be adequately explained by stupidity." Robert J. Hanlon

  5. #5
    Gunco Rookie Randy803's Avatar
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    Quote Originally Posted by Winn R View Post
    What machining processes are involved to cut the reamer. Would you start with the simpler "d" design first?

    And what source do you use for chamber dimensions?
    I cut the reamer to size on the lathe, head, body, taper, neck and pilot length and diameter.

    Then I place in the mill and find the EXACT center of the radius and I mean EXACT!!!!!

    Then for a D style just cut in half like my picture.

    You can get dimensions from google. If you get case dimensions add .002 to all of them.

    HERE IS A GREAT TUTORIAL THAT GOT ME STARTED!!!
    How I make chamber reamers

  6. #6
    Gunco Veteran Viper Dude's Avatar
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    Thanks for the info and link.

    VD

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    Indian Admin Winn R's Avatar
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    I have never tryed the tail off set to cut a taper but I've read about it.

    Am I understanding right that the length of the taper then the amount of clearance from the tool at the closest and furthest points is measured?

    There is no nonsense so errant that it cannot be made the creed of the vast majority by adequate governmental action. -- Bertrand Russell


    "Never attribute to malice that which can be adequately explained by stupidity." Robert J. Hanlon

  8. #8
    Gunco Rookie Randy803's Avatar
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    Winn that is correct!

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