|Project by hypnos||posted 04-23-2010 04:49 PM||3524 views||12 times favorited||5 comments|
This jig is a modified version of one found on American Woodworker – I added a height adjusting shelf and horizontal clamping to it so I wouldn’t have to mess with using shims at all. The dimensions are also slightly wider and deeper so it accepts stock a tiny bit bigger than the 3” wide and 4 1/2” deep dimensions from the article. The first picture shows the sacrificial bottom with a stop block (the piece to the left of the jig) that is inserted on top of the shelf and does not move when the adjustable height shelf is tightened.
I just bought this router about a month ago and I’ve never made a mortise before, plus I do not trust my ability (or rulers) to make easily repeatable and parallel mortises.
For these six coffee table legs I am making, I just had to find the center point on one leg, adjust the distance from the edge guide to the center of the bit, and adjust the stop blocks on top for the height of the mortise I wanted (it’s a 1” tall mortise and 1/2 inch wide – the same width as the spiral upcut bit I’m using), and I could cut them all after that with no measuring – just slide the leg in the back up to the stop block and tighten the clamps that go through the back wall…
All of the hardware can be found at Lowes, no such luck at Home Depot.
The last picture shows a couple legs with my first attempts at squaring the corners, it turned out great but a bit time consuming – it was my first time using my chisels I’ve had for a year too. I’m getting faster at that part though.
-- David P., Kansas City