box joint SPLINTERS, UGH!

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Forum topic by kimball posted 04-10-2011 04:54 PM 1121 views 0 times favorited 5 replies Add to Favorites Watch
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323 posts in 2721 days

04-10-2011 04:54 PM

Topic tags/keywords: jig joining tablesaw

Years ago I built my first box joint jig just to have it. It just sat around and sat around, never getting any use. I also had some very beautiful but small QSWO scraps that I couldn’t bring myself to throw away but didn’t know what to do with. Then, last month, I saw a finger jointed salt box on this site. “Ahaa” says I. “I will make my wifey one of those using all of my precious scraps.”
So, I break out my 10 year old Freud 8” dado set and my dusty, untried box joint jig. I set them up on my TS and “VIOLA”, SPLINTERS. I tried a sacraficial fence and …. SPLINTERS.
Is it just because I don’t have a Forrest Dado King or am I doing something wrong? Or do I just need to go back to using dovetails?

5 replies so far

View NBeener's profile


4808 posts in 2598 days

#1 posted 04-10-2011 05:17 PM

Try sandwiching (and I mean firmly—use clamps, if you can) the board that you’re going to use FOR the box … between two pieces of scrap.

Tearout can be greatly reduced in this manner.

-- -- Neil

View Pop's profile


427 posts in 3370 days

#2 posted 04-10-2011 08:57 PM

I built this fancy-dancy box joint jig. It was a kit, but it adjust for different box joint sizes & has a back up support to help with the splinter problem.

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-- One who works with his hands is a laborer, his hands & head A craftsman, his hands, head & heart a artist

View SRHD's profile


4 posts in 2027 days

#3 posted 04-10-2011 09:36 PM

I have built the same jig as Pop and it works perfect for the tear out. I use a thin strip of oak and never really have a problem. Just make sure its clamped tight against the scrap and it should stop.

View kimball's profile


323 posts in 2721 days

#4 posted 04-11-2011 09:28 PM

Thanks yawl (2 masted sailboat) As soon as I have a need for ye ol’ box jig again, I will give that clamping thing a try.

View woodism's profile


46 posts in 2401 days

#5 posted 04-12-2011 04:38 AM

for difficult woods, a layer of masking tape can be a real help.

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