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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?

  • Oh the biscuits are too small, not too big! Dang I was about to pass on a tip to shrink them. You can't use them wet, they must be dry (bone dry if at all possible) so soaking in water is absolutely a no-go. Bottom line you need to buy different biscuits, unless a different blade is available that will fit the Ryobi which has a narrower kerf. – Graphus Apr 8 '18 at 11:24
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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.

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4mm or 5/32" kerf is standard.

  • Are different sized biscuits all the same thickness? I know FF sized biscuits ("Face Frame") require a different blade. Are they different than 0, 10, and 20 biscuits? – Charlie Kilian May 8 '18 at 21:59

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