What are the standard dimensions for biscuit joints?

Question

I recently acquired a Ryobi biscuit jointer and purchased some Freud biscuits. They didn’t fit the slots made by the biscuit jointer very well. I am aware that the biscuits are made to swell when wet, so I tried to check the fit by soaking them in water. They fit better, but it was still not what I would call a snug fit.

So I’m trying to figure out if the biscuit jointer blade is too big, or the biscuits are too thin. Or is there no standard for biscuit thickness?

joinery

So I'm trying to figure out if the biscuit jointer blade is too big, or the biscuits are too thin. Or is there no standard for biscuit thickness?

Chuck S · Answer

4mm or 5/32" kerf is standard.

Toby Won · Answer

I have just purchased one of them myself.

I've jointed a few projects now and they worked brilliantly.  The biscuits I brought were just "off the shelf" size 20.

I think you need different biscuits.  I know it may sound lame but stick a cut into a small piece of wood and take that in for sizing.  I know, I said it was lame but it would help.

What are the standard dimensions for biscuit joints?

2 Answers

Add your own answers!

Ask a Question