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Tight Reamer

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  #1  
Unread 11-01-2010, 09:36 PM
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Tight Reamer

Hello, I have only chambered about a dozen barrels and ran into a situation I haven't run into before. On a SS and a CM barrel the reamer got tight and was hard to pull out. They were 2 different calibers with new reamers. It felt like the chips weren't moving out of the way while reaming and getting between the reamer and the barrel. I have been using the dark heavy cutting oil. Anyone have any ideas on what I might be doing wrong?

Thanks
Wayne
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  •   #2  
    Unread 11-01-2010, 09:51 PM
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    Join Date: Feb 2009
    Location: Spokane Wa
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    Re: Tight Reamer

    How often are you cleaning the reamer and chamber. I've found that my chambers come out cleaner/ smoother if I clean every .030-.040" while reaming the chamber. If you're not cleaning the reamer and chamber at lest every 1/4 -3/8" the reamer will sieze everytime.
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      #3  
    Unread 11-02-2010, 06:03 AM
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    Re: Tight Reamer

    Who made the reamer?
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      #4  
    Unread 11-02-2010, 09:10 AM
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    Re: Tight Reamer

    Quote:
    Originally Posted by ak1251 View Post
    How often are you cleaning the reamer and chamber. I've found that my chambers come out cleaner/ smoother if I clean every .030-.040" while reaming the chamber. If you're not cleaning the reamer and chamber at lest every 1/4 -3/8" the reamer will sieze everytime.
    +1

    The reamer should be removed and cleaned as stated unless you have a high pressure
    lube system that will flush as you ream.

    If your not having this in the beginning (Sometimes the pilot/bore fit is not good) Then it is probably the cleaning redjument.

    The only other thing I can think of is spindle speed and feed pressure on the reamer.

    Good luck.

    J E CUSTOM
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      #5  
    Unread 11-02-2010, 09:38 AM
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    Re: Tight Reamer

    Thanks guys. I do remove and clean every 0.050". I run the lathe at 90 rpm. Sometimes I will go up to 120 rpm. I feed the reamer appox. 0.005"-0.008" per second. Do you think thats too slow or too fast?
    Thanks again for the in put.
    Wayne
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      #6  
    Unread 11-02-2010, 09:54 AM
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    Re: Tight Reamer

    Quote:
    Originally Posted by cuutter View Post
    Thanks guys. I do remove and clean every 0.050". I run the lathe at 90 rpm. Sometimes I will go up to 120 rpm. I feed the reamer appox. 0.005"-0.008" per second. Do you think thats too slow or too fast?
    Thanks again for the in put.
    Wayne
    I like to hold the reamer with a live center and a tap handel so that I can feel the reamer
    cutting, and 30 to 40 thousandths is normally max depending on the reamer.

    Some reamers load up with .030 feed so I back of and feed .020 to .025.

    Most reamer makers say that you can run faster than I do but I dont have a lube system "YET"
    and I run 40 to 70 spindle RPM to keep from heating the reamer any. also at these speeds I can feel the instant it loads up and needs to be cleaned.

    I know this slows down the chambering job but not by much and my reamers are extremely
    sharp after a dozen uses.

    Everyone has there way of doing chambers and this is mine.

    PS: The smaller the reamer the quicker it will load up because of the depth of the flutes. On the 17 HMRs I can only feed
    .010 to .015 without cleaning.

    J E CUSTOM
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    Last edited by J E Custom; 11-02-2010 at 09:59 AM.
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      #7  
    Unread 11-02-2010, 10:03 AM
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    Re: Tight Reamer

    Thanks again JE. It sounds like it's in the way that I am feeding the reamer. I will try feeding less and see what that does for me.

    Have a great day
    Wayne
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