Page 1 of 3 123 LastLast
Results 1 to 20 of 45
  1. #1
    Ray Behner's Avatar
    Ray Behner is offline Titanium
    Join Date
    Mar 2009
    Location
    Brunswick Oh USA
    Posts
    2,762

    Default gun drilling on lathe

    If there's enough interest in doing this on a conventional lathe, I'll go through all the steps. If not I'd rather not go through all the typing and picture taking. First off, what you need is about $1100.00 in an air over coolant pump and a gun drill. This is NOT like an Eldorado or other, but will result in very accurate drilling. Also what you need is a good lathe with approx. 2 - 3000 rpm with a feed rate of
    .0005'' or less. The tougher and or harder the material the lower the feed rate should be. Response?

    Ray

    on edit: Go down a ways and I'll show you how I made this thing.
    Last edited by Ray Behner; 11-23-2009 at 04:17 PM.

  2. #2
    ToolPost is offline Cast Iron
    Join Date
    Sep 2008
    Location
    Anytown, USA
    Posts
    334

    Default

    Sounds like an interesting read and could prove very helpful to many who don't have the facilities to gun-drill conventionally.

  3. #3
    small.planes is offline Plastic
    Join Date
    Sep 2008
    Location
    Leics UK
    Posts
    42

    Default

    Always interested in learning more 'esoteric' techniques, they come in handy when others will not do.

    Dave

  4. #4
    knudsen's Avatar
    knudsen is offline Stainless
    Join Date
    Jul 2009
    Location
    Cobblers Knob, IN USA
    Posts
    1,106

    Default

    I would read it with interest, but not be able to apply it. At least not directly; never know what I would pick up and use elsewhere.

  5. #5
    GeneT is offline Cast Iron
    Join Date
    Feb 2002
    Location
    Albany, OR 97321
    Posts
    422

    Default

    I would very much like to see this.

    GsT

  6. #6
    Vladymere gr is offline Cast Iron
    Join Date
    Dec 2008
    Location
    Charlotte, NC
    Posts
    261

    Default

    If you write it I will copy it and archive it on my hard drive. I don't know when, if ever, I will piut it into application though.

    Vlad

  7. #7
    Kallam is offline Cast Iron
    Join Date
    Feb 2006
    Location
    South Carolina
    Posts
    263

    Default

    Love to see it.

  8. #8
    jim r is offline Cast Iron
    Join Date
    Aug 2002
    Location
    Sinton, TX.
    Posts
    252

    Default

    Please do.

    jim

  9. #9
    9100's Avatar
    9100 is offline Titanium
    Join Date
    Nov 2004
    Location
    Webster Groves, MO
    Posts
    3,828

    Default

    I gun drilled a bunch of transformer cores on my 15" Sheldon lathe, having to work it all out myself. I will be interested in your solutions.

    Bill

  10. #10
    Join Date
    Nov 2005
    Location
    Maryland
    Posts
    6,769

    Thumbs up One more yes

    Hi Ray,

    I would certainly be interested.

    I don't do any gunsmithing since I let my FFL expire, but I expect the techniques would be applicable to other deep-hole work.

    Thanks.

    - Leigh

  11. #11
    Ray Behner's Avatar
    Ray Behner is offline Titanium
    Join Date
    Mar 2009
    Location
    Brunswick Oh USA
    Posts
    2,762

    Default

    Well good, there's interest! I have a recurring job that requires a 21'' deep hole in 1 3/4'' piston rods for a sensor in some sort of hydraulic cylinder. Getting sick and tired of peck twist drilling that deep with 4 different length drills I bought a Sterling Gun Drill for the lathe. The first pic is the coolant unit. It operates on 100 psi which blows the air through the hollow drill, plus operates an air powered piston booster pump to inject coolant into the mix. The next pic is a 1/2'' x 22'' gun drill.





    Now comes the way I made a drill mount to fit my lathes. It has a 1/2'' base with a 3'' piece of bar stock welded to upright supports. I rough drilled the bar stock to 1 5/16''. Stuck the drill bit in the lathe chuck and slid the bar on it. Now I can measure the height between the bar and base plate for support ribs. The pieces are cut and holes drilled to fit the T slots of the cross slide. After I welded the assembly together I flycut the base bottom because of warpage

    .



    OK, now that it's roughed in it's mounted to the cross slide. I used dowels to align it to the T slots, but don't think it's necessary. I also made one for my 13'' Sheldon which you can see mounted where the compound was. Next to that one is the drill bushing I made to hold the drill to the support.





    Tomorrow I'll show how to make things true to everything.

  12. #12
    Join Date
    Aug 2006
    Location
    Hesperia, SoCal
    Posts
    4,313

    Default

    We'll be here, thank you. I'm most curious how you adapted your drill holder to the air and coolant, lessee, O-rings.......

    Bob

  13. #13
    Ray Behner's Avatar
    Ray Behner is offline Titanium
    Join Date
    Mar 2009
    Location
    Brunswick Oh USA
    Posts
    2,762

    Default

    Quote Originally Posted by Robert Campbell Jr. View Post
    We'll be here, thank you. I'm most curious how you adapted your drill holder to the air and coolant, lessee, O-rings.......

    Bob
    Bob,

    Nope, it's even more niftier than that! Gotta go take more pics of this mess.

    Ray

  14. #14
    jim r is offline Cast Iron
    Join Date
    Aug 2002
    Location
    Sinton, TX.
    Posts
    252

    Default

    Do take some pics of your stock holding/centering setup on the
    back end of your head stock. Thanks for the good photos.

    jim

  15. #15
    Join Date
    Nov 2007
    Location
    marysville ohio
    Posts
    4,019

    Default

    Why is everything so big that I have to scroll back and forth to see and read everything? Can I make it smaller on my computer?

  16. #16
    AussiePhill is offline Plastic
    Join Date
    Nov 2008
    Location
    Perth, Western Australia
    Posts
    41

    Default

    G'Day Ray,

    I think this is a great thread!!!!

    I personally would like to see a few more details about the gun drill itself. Having never seen one, I am very interested in it's sectional profile and it's cutting edges/point angles etc. What material is it made from? Is it ground true?

    I am looking forward to the next installment.


    Cheers,

    Phill.

  17. #17
    Ghost is offline Cast Iron
    Join Date
    Aug 2009
    Location
    Royersford PA USA
    Posts
    276

    Default

    Quote Originally Posted by moonlight machine View Post
    Why is everything so big that I have to scroll back and forth to see and read everything? Can I make it smaller on my computer?
    It's because the pics are so big, there's nothing you can do about it. Ray could make the pics smaller though.

  18. #18
    Garwood is offline Stainless
    Join Date
    Oct 2009
    Location
    Portland, Oregon
    Posts
    1,769

    Default

    I'm very interested to hear how this works! Please give details on the process and the drill!

  19. #19
    RDL
    RDL is offline Stainless
    Join Date
    Jun 2005
    Location
    Edmonton,Alberta,
    Posts
    1,069

    Default

    Great projects; both doing it and documenting it for us. Pictures are clear and well done. I prefer to scroll a clear picture than look at a small poorly defined photo.

    Raymond

  20. #20
    HuFlungDung is offline Diamond
    Join Date
    Jan 2005
    Location
    Canada
    Posts
    6,413

    Default

    Quote Originally Posted by moonlight machine View Post
    Why is everything so big that I have to scroll back and forth to see and read everything? Can I make it smaller on my computer?
    I'm using IE and I found out the other day while fat-fingering my mouse and keyboard, that if one holds down CTRL and zooms with the scroll wheel of the mouse, that everything shrinks real small, real fast But it will resize stuff for a quick view

Page 1 of 3 123 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •