|Project by Rick Dennington||posted 02-08-2017 06:37 AM||2796 views||12 times favorited||18 comments|
This is my version of a circle cutting jig…I wanted a jig that was dead-on accurate, easy to build, and didn’t use a lot of parts to make….This is what I came up with after a couple of prototypes, or trial and errors…..
On the back side I measured over to the center of the ply vertically, and mounted the T-track with 4 screws..no glue..The T-track fit perfectly in the miter slot on the bandsaw.. Then I found the center line on the face side, and measured it horizontally, which was 7 1/2”....Drew a line all the way across….Put the T-track in the miter slot, and cut a groove all the way to the center line, stopping the teeth of the blade dead on the line….From the blade I measured over 1”, and measured the rest of the holes in 1” incriments….Took an awl and punched a small hole where each of the holes would go, being careful to stay dead on the line….Then I used a 1/4” Forstner bit and drilled all the holes 1/4” deep, and numbered each hole…After that, I put the jig back on the saw, pushed it to the center line, then added and glued a stop block underneath the front of the jig…..I then cut a 1/4” dowel a 1/2” long to act as a pivot point for the center of the circle I would make, drilling a 1/4” hole in the circle…..After everything was done and tested, I then put iron-on edging on the raw ply edges just to dress it up a bit…..Put on two coats of tung oil top and bottom, and let it dry good….That’s it….!! I wanted this jig to be dead-on accurate, and it is….!! Thanks for looking…
(1) 1- piece of 3/4” Birch plywood 15” x 21”
(2) 1- 3/8×3/4” T-track
(3) 1- 3/4×3/4” Walnut stop block
(4) 1- 1/4” x 1/2” dowel
-- Here in the South, we say "down the road a piece"...and , "it's over yonder".....!!