Helpful Jigs #2: Two Piece Jig to Make 1" Thick Bent Lamination

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Blog entry by rhett posted 01-06-2014 09:51 PM 947 reads 0 times favorited 3 comments Add to Favorites Watch
« Part 1: Plane iron sharpening jig Part 2 of Helpful Jigs series Part 3: Using the lamination jig »

Too cold to spray finish and waiting on blades, so here is a quick blog on a technique to make matching curves for bent laminations.

NOTE: The desired final thickness of your lamination is equal to the diameter of the bottom bearing trim bit you use in this method.

Blanks for the jig. 4 pieces of 3/4” ply to make a 3” deep jig.

Cut and faired 1/4” template is used to get initial curve on a piece of 3/4” ply.

Flush trimmed curve is used as bearing reference for 1” diameter bit. One uncut blank is screwed to the bottom of your initial curve.

Bottom bearing bit routing a channel in one uncut blank. Important that your router stay tight against the curve, as you are cutting the opposite side of your jig at this time.

Plowed out groove is 1” wide. Cut down the center and use the milled edge of the groove as a reference for a flush trim bit.

You now have both sides of your jig with a matching complementary curve.

Screw the remaining rough cut pieces of ply consecutively together, flushing the new plate each time.

Jig ready for strips of wood.

I will cover the surfaces in box tape to keep glue from sticking. CDX is not the best jig making material but I had half a sheet in the shop so I used it.

-- It's only wood.

3 comments so far

View BubingaBill's profile


247 posts in 338 days

#1 posted 01-07-2014 07:23 PM

Great design!
Thanks for posting. It will help in my up coming project!

-- Measure twice and try not to cut your thumbs off!

View BigRedKnothead's profile


4977 posts in 636 days

#2 posted 01-07-2014 07:32 PM

Good stuff. I’ve never done bent laminations, but I’ve got some coming up this year.

-- Red -- "That the powerful play goes on, and you may contribute a verse." W. Whitman

View rhett's profile


699 posts in 2321 days

#3 posted 01-07-2014 11:16 PM

This is for Flair Woodworks shop stool build off. Just a little pre-work. I will be posting the entire process on my FB page, , on the day of the build off, Jan 25.

-- It's only wood.

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