Ever make a pilot bushing?

Discussion in 'Gun Project Questions & Gunsmithing' started by Shawnba67, Jan 13, 2018.

  1. Shawnba67

    Shawnba67 Silver $$ Contributor

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    I have a one time need for a pilot bushing and am strongly considering just making one myself. VS having a custom made
    What material should I be thinking? Brass? Copper? Any old steel? Tool steel?
    This is for a self job not any form if customer. Course Id like decent results.
    Any advice or is it as easy as it seems? Well easy to sub .0003 tolerances lol
     
  2. Cloudrepair

    Cloudrepair Gold $$ Contributor

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    I take it u have a lathe and a small enough boring bar to do it
    if your going to use it only a couple times brass may work great
    Or maybe some pre heat treated 4140 for better wear or even some 1018 for a few more uses.
    Brass would work maybe only one use but if done accurately should be great without hurting the rifling
     
  3. ab_bentley

    ab_bentley I fix stuff, sometimes.... Silver $$ Contributor

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    To make it right, you need a cylindrical grinder.

    Adam
     
  4. carlsbad

    carlsbad Details matter. Silver $$ Contributor

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    If you have a reamer for the ID, you can do the OD first and probably get pretty good results. That way if you don't get the diameter you want on the outside, cut it off and do it again. then drill, bore, and ream the ID.

    If you do the inside diameter first, you'll probably get a taper as the result of flex from tool pressure, no matter how small a cut you make.

    If your tailstock is centered to .0001", which most aren't, then you can use a tailstock with an interchangeable center....

    Lots of time and expensive tooling to make a piece you can buy for $12.

    Now I DO make my own resizing bushings. That way I can play with them until I get he neck tension I want. Worth an hour on the lathe.

    --Jerry
     
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  5. Shawnba67

    Shawnba67 Silver $$ Contributor

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    Lots of time and expensive tooling to make a piece you can buy for $12.

    Now I DO make my own resizing bushings. That way I can play with them until I get he neck tension I want. Worth an hour on the lathe.


    --Jerry[/QUOTE]
    So.... whats a neck bushing cost?
    I apologize for the friendly ribbing.
    And I appreciate all the advice.
    Thank you all.
     
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  6. carlsbad

    carlsbad Details matter. Silver $$ Contributor

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    Yes, a neck bushing is cheap. But they are much easier to make and I can have my reloading setup going in an hour vs days while waiting for a bushing. Also, I avoid having to buy 3 bushings to make sure I got the one I want.

    I prefer to buy them. I only make them when I'm wanting to reload that day. But he .3375 one I made for my 308 has served me well.

    --Jerry
     
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  7. boltfluter

    boltfluter Gold $$ Contributor

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    I made one out of brass and it worked just fine.:D:p

    Paul
     
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  8. carlsbad

    carlsbad Details matter. Silver $$ Contributor

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    Paul,
    did it show cut marks from the rifling? This would be one of the applications I would be concerned about brass. Of course the lands are pretty wide so maybe my concern is unwarranted. --Jerry
     
  9. boltfluter

    boltfluter Gold $$ Contributor

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    Jerry, nothing that I could see by eye. Just needed one to get me out of a bind. Time wise that is.:D:D

    Paul
     
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  10. DaveTooley

    DaveTooley Silver $$ Contributor

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    I've made them before using both steel and brass. I do the ID first then put the bushing between centers and finish the ID. I don't care if there's a little taper on the OD. Just needs to be up to size on one end. Not hard to do using a piece of flat stock and 400 for the final few tenths. Sometimes we over think things, sometimes--nah most of the time.
     
  11. carlsbad

    carlsbad Details matter. Silver $$ Contributor

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    With 35 years in he nuclear industry, I'm more guilty than most of overthinking.
     
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  12. gunsandgunsmithing

    gunsandgunsmithing The best tuners and wind flags on the market Gold $$ Contributor

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    I've made a few. I ream and polish the id to size, then machine the od close, and polish it to size. Then part it off and de-burr. Watch the heat if you want it to truly be to size, within a tenth or so.
     
    Last edited: Jan 14, 2018
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  13. Alex Wheeler

    Alex Wheeler Gold $$ Contributor

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    If your setup is right you dont need a bushing at all. And in some ways the chambers turn out better without one.
     
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  14. Dans40X

    Dans40X Welder

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    In the 21st century
    Whom would have thought a simple pilot would require a rocket scientist to produce such a simple item.

    WTF has this country become!!
     
  15. GenePoole

    GenePoole

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    Just curious, what do you do? I was a "nuke" in the Navy, but 6 years was more than enough nuclear industry for me.
     
  16. carlsbad

    carlsbad Details matter. Silver $$ Contributor

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    I'm the Engineering Manager at a nuclear power plant. The plant has been shut down permanently and my staff and I are managing spent fuel, licensing, and eventual shipping to DOE. All my comments here are mine, and not my employer's. --Jerry
     
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  17. gunsandgunsmithing

    gunsandgunsmithing The best tuners and wind flags on the market Gold $$ Contributor

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    In many cases nowadays, American ingenuity is called "Google". Lol.
    Making these bushings is very easy and you can be very precise in doing it.
     
  18. carlsbad

    carlsbad Details matter. Silver $$ Contributor

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    OK. I take back my concern about taper. They are shorter than I was remembering. --Jerry
     
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  19. Dusty Stevens

    Dusty Stevens

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    San Onofre? Sad deal
     
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  20. butchlambert

    butchlambert Site $$ Sponsor

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    You are correct. I had rather my reamer follow a taper bored hole than a bushing following a wandering bore.
     
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