Remember this creature? http://pfollansbee.wordpress.com/2013/10/10/wooden-saw-vise/
I dug out my copy I started some time ago. It was at the point where I needed to turn the roller that tightens the two frames of the vise. It works by twisting the roller – it has an off-center round tenon fitted into the two front stiles. Here’s the old one showing the roller at the bottom of the front frame.
After turning the cylinder, I thought some about how to make the off-center tenons. I’m not Roy Underhill, so that means I did not mark new centers, re-mount it on the lathe, and turn it off-center . Instead, I marked it out with an awl & compass, and sawed, split & shaved it. Quick & accurate if you take it step by step.
I started by marking plumb lines through the center of the roller’s ends. This helps me get both ends marked out so they agree. I set the roller in the “joiner’s saddles” or V-blocks for any moderns out there. Hit a holdfast, then used a square and awl to strike a vertical line on the end grain, through the centerpoint. Check that w the square, then mark the other end
Now it’s simply a matter of setting a compass to 5/16” to strike a circle of 5/8” on that line, bumped up to the top of the roller…
then some saw kerfs, and splitting off the waste. One:
Then shaving the roughed-out tenon by using the spoon carver’s “crossed thumbs” grip.
Test fit in a hole bored in a piece of scrap hard wood. trim to fit.
Here’s the front assembly.
The roller bears against two strips of hardwood glued to the rear stile’s inner faces. I keep a box of short off-cuts of straight-grained hickory and ash. The box is labeled “tool handle stock” – but I dip into it whenver I need dry, hard clear stuff. Hickory is my first choice for these. The originals were repositioned, after wearing out one side/edge.
right now mine are just glued on. The old ones are glued & nailed. Next time I’ll start testing the action of the cam-roller, and see how well it closes the jaws of the vise.
As I was ready to leave, here’s the view out the window. I love it this time of year.