I’m working on jigs and fixtures these days, several being made out of Baltic birch plywood, and oak where needed. How much protection do these gizmos need against humidity? For long straight pieces of hardwood, I’m applying 2 coats of shellac, and wax. I’m just finishing a router fence that’s a combination of oak and BB ply, and have applied shellac to all parts. Am wondering how susceptible BB ply is to movement from humidity.
Other jigs on the agenda include a sled for crosscutting, a tenoning jig to slide on the fence, and the dealie-bob for cutting for splines.
forestgirl — you can take the girl out of the forest, but you can’t take the forest out of the girl 😉
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I would really recommend something to control movement; shellac as the reputation of being a really superior barrier to water vapor, though not liquid. I just pitched a 10' (yes, 10 foot) jointing jig that warped.
Though OT some, if you have a cross-cut sled, I would not bother with a tenoning jig for the fence. I made both and the sled is far superior. Its just a block of hardwood about 2x2x10 that I clamp to the back fence of the sled with a metal C-clamp. Really easy to adjust and gives great accuracy. Obviously cautions about saw blades and clamp handles apply...
JK
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