Results 1 to 11 of 11

Thread: Any tricks or bit recommendations for boring existing pinrail holes larger?

  1. #1
    Join Date
    Nov 2019
    Location
    Brentwood Bay, BC, Canada
    Posts
    36

    Default Any tricks or bit recommendations for boring existing pinrail holes larger?

    Do you guys have any drillbit recommendations and or tips for getting a good clean straight bore out of existing pinrail holes? We are beefing up the belaying pins on the boat I work on and the new pins are ready but I wanted to sound the waters here to see what you guys would use.

    Cheers

    Ryan

  2. #2

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    you can drill a block of wood about 4 inches thick on a pillar drill then clamp the block over the hole as a guide, or use a magnetic pillar drill above the rail

  3. #3
    Join Date
    Apr 2015
    Location
    St. Helens, Oregon
    Posts
    4,964

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    Or you can epoxy in a plug, then re-bore using a conventional bit.

  4. #4
    Join Date
    Feb 2017
    Location
    Seattle, W.A., U.S.A
    Posts
    306

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    All those work, so does a twist drill, or for a belaying pinhole you could probably use a. router jig

  5. #5
    Join Date
    Nov 2019
    Location
    Brentwood Bay, BC, Canada
    Posts
    36

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    Thanks for the ideas guys!

  6. #6
    Join Date
    Nov 2011
    Location
    Salt Spring Island, BC
    Posts
    7,964

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    Yes, the pre-drilled block of wood on top and a solid scrap on the bottom to avoid blowout at the exit and use a forstner bit, known for their very clean boring. Repeat...clamp a piece at the exit to avoid blowout, a fresh piece for each hole.

    This type of forstner...



  7. #7
    Join Date
    Sep 2010
    Location
    Bainbridge Island WA
    Posts
    5,159

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?


    I've had success using stepped drills to enlarge existing holes. In your case you would need to find one that finishes out at the right diameter but they do seem to come in a lot of sizes.
    Steve

    If you would have a good boat, be a good guy when you build her - honest, careful, patient, strong.
    H.A. Calahan

  8. #8
    Join Date
    Oct 2000
    Location
    Padanaram, MA USA
    Posts
    10,310

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    Another couple:

    If you’re only going up 1/8” or so, put a dowel in the existing hole and use it to guide a hole saw.

    If the holes are regularly spaced, a guide block for a Forster bit (or hole saw) could be clamped with bolts through neighboring holes.

  9. #9
    Join Date
    May 2010
    Location
    Port Townsend, Wa.
    Posts
    915

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    Quote Originally Posted by stromborg View Post

    I've had success using stepped drills to enlarge existing holes. In your case you would need to find one that finishes out at the right diameter but they do seem to come in a lot of sizes.
    I have had success with using these step bits to start and get centered, then switching to the bit you really want to use.

    Ken

  10. #10
    Join Date
    Apr 2010
    Location
    Fairfield, CA
    Posts
    2,629

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    Quote Originally Posted by stromborg View Post

    I've had success using stepped drills to enlarge existing holes. In your case you would need to find one that finishes out at the right diameter but they do seem to come in a lot of sizes.
    I like these too. If the piece is thin enough to fit one of the steps those drills are really nice. They do not grab like a twist drill so are easy to do by hand, and they follow the centering of the existing hole.

  11. #11
    Join Date
    Nov 2004
    Location
    Port Townsend WA
    Posts
    14,445

    Default Re: Any tricks or bit recommendations for boring existing pinrail holes larger?

    your can use a block of wood that has been drilled on a drill press to accept the drill as Peter mentions in post #2 or use a Rockler guide that does the same thing. https://www.rockler.com/jig-it-drill...=US&sid=V91040
    Are the pins metal or wood?
    Jay

Posting Permissions

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