How do i match a radius?

[David Ruhland]

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...

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[Gary Ragatz]

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.

[Grant Wilkinson]

I have one of these

http://www.leevalley.com/us/wood/pag...=1,42936,42958

[Prashun Patel]

45 degrees wouldn’t for for you?

[Nick Decker]

Or this:

https://www.amazon.com/MLCS-9327-Woo...2AB8K4W267NWAV

[Marshall Harrison]

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.

[Charles Taylor]

I have one of these

http://www.leevalley.com/us/wood/pag...=1,42936,42958

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.

[David Ruhland]

not sure... haven't attempted it yet

[David Ruhland]

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

[Marshall Harrison]

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.

[Steve Eure]

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

[Jim Becker]

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.

[Al Launier]

Same as Jim; make a cardboard template & you're good to go.

[Brian Tymchak]

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.

[Tim Bueler]

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.