Wood Hinge Layout Questions

  • 10 Feb 2019 1:46 PM
    Message # 7156528

    Hello friends,

    I'm working on my first wood hinge box and following along closely with your DVD.  However, I'm struggling to get the wood hinge working laid out correctly on the router on a test piece.  It's 1/4"  thick which is the same as the finished box will be.

    I've attached a layout as I believe it should work.  Is this accurate?  My questions are:

    • Should the center line of the dowel be in line with the top of the back as I've shown?
    • Does is matter how far the dowel pin is from the edge.  Should it be farther in or does it matter?
    • I assume the top and back are cut with the same router settings.  The video didn't show that but that must be true.
    • When Rob cut his back in the video, he had a small lip on the back side which my diagram wouldn't have.  Trying to understand this.  Please 2nd attachment.

    I've through through this more and drawn this since my unsuccessful attempts so I think I'll head back to the shop and try to replicate this.  This has clarified this somewhat in my head.

    Thank you all very much.

    Michael

    Last modified: 10 Feb 2019 1:55 PM | Michael
  • 12 Feb 2019 9:35 PM
    Reply # 7161483 on 7156528

    Michael,

    I am also getting ready to build a box with wood hinge and was watching Rob but not getting critical dimensions for setting the fence.

    I saw you post and drew this up. I would be interested to know if this sketch helps and works.

    See attached pdf

  • 12 Feb 2019 10:00 PM
    Reply # 7161490 on 7161483
    Anonymous wrote:

    Michael,

    I am also getting ready to build a box with wood hinge and was watching Rob but not getting critical dimensions for setting the fence.

    I saw you post and drew this up. I would be interested to know if this sketch helps and works.

    See attached pdf

    Hi William,

    I checked out your drawing dimensions and found that the top will only open to about 75 degrees.  In other words max opening is 15 degrees short of verticle.  So it will not open to the 10 degrees past verticle you show.

    Carry on.

    Larry

  • 12 Feb 2019 11:01 PM
    Reply # 7161588 on 7156528

    Thanks,

    I will check measurements and adjust

    Thanks for checking, I appreciate it

    Bill

  • 13 Feb 2019 9:42 AM
    Reply # 7162196 on 7156528

    Hi Bill,

    I think there is also a problem with the router table settings you listed in your pdf.  There is a problem with raising the bit above the table more than the radius of the cut.  You get into the straight cutting section of the bit's profile and the result is flats in the cut profile. If I understand the procedure your thinking of you would end up with these results

    Last modified: 13 Feb 2019 9:53 AM | Anonymous member
  • 13 Feb 2019 11:14 AM
    Reply # 7162349 on 7156528

    One possible solution to the position of the hinge is: center offset 5/64" from back and on joint line.  In other words bit is 1/8" above table and buried 3/64" into the fence (ie-13/64" showing).  This configuration allows the top to open approx. 100 degrees.

    Last modified: 13 Feb 2019 11:34 AM | Anonymous member
  • 14 Feb 2019 1:19 PM
    Reply # 7165596 on 7156528

    Thanks Larry.  I'm going to take your measurements and use those as a starting point on some test pieces.  Looks like my simple diagram is correct, but the key is really knowing where to start and then dialing it in.

    How did you make your calculations?  I'd love to understand how you came about those numbers.

    Michael

  • 14 Feb 2019 1:38 PM
    Reply # 7165631 on 7165596
    Michael wrote:

    Thanks Larry.  I'm going to take your measurements and use those as a starting point on some test pieces.  Looks like my simple diagram is correct, but the key is really knowing where to start and then dialing it in.

    How did you make your calculations?  I'd love to understand how you came about those numbers.

    Michael

    http://robcosman.memberlodge.com/resources/MemberAlbums/5127246/Illustrations/Wood%20Hinge%203.jpg

    Hi Michael

    I used Sketchup to make a few actual size test 3D models of the top, back and hinge pin.  The great thing about Sketchup models is the ability to grab hold of the top and rotate it.  By rotating the top until it touched the back it is possible to approximate the maximum angle the top will open and how moving the center of rotation (hinge center) affects the outcome.  A useful tool in the design stage.

    Carry on.

    Larry

    Last modified: 14 Feb 2019 1:50 PM | Anonymous member
E-Mail Support                                                                                                                                RobCosman.com

Rob Cosman's Signature Hand Tools




This site is maintained by AlphaOneStudios
Powered by Wild Apricot Membership Software