|Home » Forums » Cabinetmaking » Message||Login|
You are not logged in. Consider these WOODWEB Member advantages:
R&S tenon clearance10/5
I'm having a pair of custom rail and stile cutters made for a job. The approval tooling drawings show zero clearance for the tenon. What clearance should be typical in thickness and length for a good fit?
For tenon thickness, ideally the tolerance should be matched to the shaper. Any runout will create clearance. I guess that for a first order, I would go for zero clearance.
For depth, I think that 0.001" to 0.002" is fine IF you are removing the entire edge during the sticking cut. I've noticed that the better tooling makers will also make sure that the geometry ensures that the outer faces of the joint mate tightly. A very small amount of clearance is designed in right at the groove, tapering to the outside faces. From what I can tell, this is too small to measure though.
Ive had custom door sets made up by Royce/Ayr. Just checked some of the drawings - they also show the tenon and groove the same dimension in thickness, but leave a 0".010 deeper cut on the groove for glue clearance.
WHen I machine the tenons, I always take a cut that fully machines the end of the rails. Never have an issue with the rails not seating in the stiles, ie the shoulders always close tightly.
This is insert tooling and I usually dial indicate the knives after I change them to make sure they are all in the same cutting plane. The fit is never "tight", but not what I'd consider loose either. Similar to my other insert tooling from Byrd and Dimar as well, for door cutters.