Page 1 of 3 123 LastLast
Results 1 to 15 of 34

Thread: How do i match a radius?

  1. #1
    Join Date
    Jan 2018
    Location
    Madison WI area
    Posts
    117

    How do i match a radius?

    I am trying to figure out how to match the radius of the truck box so the board slides down inside and fits tightly to the bed. Thoughts/Suggestions please

    Thanks...

    20190314_230053602_iOS.jpg


    20190314_230059352_iOS.jpg
    Attached Images Attached Images
    Last edited by David Ruhland; 03-15-2019 at 8:21 AM. Reason: turned photo 90 degrees
    Ridgid R4513 jobsite saw, Ridgid R4512 Table saw, Ridgid JP601 jointer/planer,
    Jet DC-1100VX-CK Dust collector, Bosch 1617 EVSPK router, Bosch RA1181 router table, Rikon 10-326 Band saw
    Dewalt 735 planer, Fuji Q5Platinum HVLP,

  2. #2
    Join Date
    Aug 2018
    Location
    Michigan, USA
    Posts
    189
    If you have access to one of those devices that woodturners use to copy a profile (a contour gauge), I think that would work.

    You could also get some Play Doh and mold it into the radius, flatten the sides so you can lay it down on your work piece, and trace the radius.
    Last edited by Gary Ragatz; 03-15-2019 at 9:06 AM. Reason: Because Marshall knows what that device is called.

  3. #3
    Join Date
    Jan 2007
    Location
    Ottawa, ON Canada
    Posts
    1,197
    Grant
    Ottawa ON

  4. #4
    45 degrees wouldn’t for for you?

  5. #5
    Join Date
    Sep 2016
    Location
    Central Missouri, U.S.
    Posts
    1,234

  6. #6
    Join Date
    Sep 2004
    Location
    Jacksonville, FL
    Posts
    799
    Easiest way is to use a contour gauge.

    https://www.amazon.com/s?k=contour+g...nb_sb_ss_i_3_9

    Push it against the radius of the truck bed then transfer that to your 2x4.
    Marshall
    ---------------------------
    A Stickley fan boy.

  7. #7
    Join Date
    Mar 2013
    Location
    North Alabama
    Posts
    354
    Quote Originally Posted by Grant Wilkinson View Post

    I have a practically identical model from some other source. Ideal for the job, as long as the fingers have sufficient reach, or at least enough of the fingers that you can sketch in the rest.
    Chuck Taylor

  8. #8
    Join Date
    Jan 2018
    Location
    Madison WI area
    Posts
    117
    not sure... haven't attempted it yet
    Ridgid R4513 jobsite saw, Ridgid R4512 Table saw, Ridgid JP601 jointer/planer,
    Jet DC-1100VX-CK Dust collector, Bosch 1617 EVSPK router, Bosch RA1181 router table, Rikon 10-326 Band saw
    Dewalt 735 planer, Fuji Q5Platinum HVLP,

  9. #9
    Join Date
    Jan 2018
    Location
    Madison WI area
    Posts
    117
    Quote Originally Posted by Marshall Harrison View Post
    Easiest way is to use a contour gauge.
    .

    Thats what they are called! Thanks.... That is what i was thinking, but called it " a thingy with nail like wires" lol
    Ridgid R4513 jobsite saw, Ridgid R4512 Table saw, Ridgid JP601 jointer/planer,
    Jet DC-1100VX-CK Dust collector, Bosch 1617 EVSPK router, Bosch RA1181 router table, Rikon 10-326 Band saw
    Dewalt 735 planer, Fuji Q5Platinum HVLP,

  10. #10
    Join Date
    Sep 2004
    Location
    Jacksonville, FL
    Posts
    799
    Quote Originally Posted by David Ruhland View Post
    Thats what they are called! Thanks.... That is what i was thinking, but called it " a thingy with nail like wires" lol
    yeah, it had me baffled for a moment too. My first Amazon search was for "radius gauge" but that is a different animal. I have one in my workshop but I had to think about what it was called.
    Marshall
    ---------------------------
    A Stickley fan boy.

  11. #11
    Join Date
    Mar 2016
    Location
    Elmodel, Ga.
    Posts
    326
    You can get a flexible curve ruler like the one Nick posted at Michael's and Hobby Lobby for about the same price. Beats waiting for shipping if you have one of them close by. I've actually used a piece of #10 copper wire to replicate a curve once or twice. Not the best tool for the job, but was what I had on hand and it did the job.

    https://www.michaels.com/staedtler-m.../10192326.html
    https://www.hobbylobby.com/search/?text=slexible+curve
    SWE

  12. #12
    Join Date
    Mar 2003
    Location
    SE PA - Central Bucks County
    Posts
    48,067
    My method...a piece of cardboard and some scissors. Really...that's exactly what I'd do for this particular application. Once I had a template that was really close, it would be easy to get that on paper and figure out the numeric radius in the measuring system of choice so that it's repeatable. Or you could just use the template as a template with a pencil and then cut.
    --

    The most expensive tool is the one you buy "cheaply" and often...

  13. #13
    Join Date
    Dec 2012
    Location
    Bedford, NH
    Posts
    1,173
    Same as Jim; make a cardboard template & you're good to go.
    Thoughts entering one's mind need not exit one's mouth!
    As I age my memory fades .... and that's a load off my mind!

    "We Live In The Land Of The Free, Only Because Of The Brave"
    “The problems we face today are there because the people who work for a living are outnumbered by those who vote for a living."
    "
    Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill

  14. #14
    Join Date
    Oct 2008
    Location
    Columbus, OH
    Posts
    1,570
    Quote Originally Posted by Al Launier View Post
    Same as Jim; make a cardboard template & you're good to go.
    that's the first thought that came to mind for me. Also, you could scribe the curve with a compass such as is done to fit cabinetry to uneven walls.
    Brian

    "Any intelligent fool can make things bigger or more complicated...it takes a touch of genius and a lot of courage to move in the opposite direction." - E.F. Schumacher

  15. #15
    Join Date
    Nov 2016
    Location
    Kamiah, ID
    Posts
    240
    Quote Originally Posted by Jim Becker View Post
    My method...a piece of cardboard and some scissors.
    Ditto.

    I would make the first radius to fit and transfer that to a second piece of cardboard. Both pieces long enough to overlap. Set in place and tape together. You now have a template with not only the correct radii it is also the correct length.

Posting Permissions

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