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Screw Advance Box Joint Jig

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Project by Blackbear posted 04-13-2013 01:44 AM 4653 views 21 times favorited 11 comments Add to Favorites Watch

My father and grandfather gave me a ton of old woodworking magazines. I’ve been browsing through them, trying to find useful projects, and stumbled across this screw advance box joint jig. I built it out of hard maple following the plans closely. The screw is a piece of 3/8” all thread from a big box store. The jig works well, although there is a ton of cranking involved. In one of the pictures you can see I wrote the number of turns per desired distance. For example, if you want 1/2” box joint fingers, you have to turn the handle 16 times (8 for 1/2”, 8 more to skip the next finger) for each cut. Times that by four sides and x number of fingers each side, that’s a lot of cranking. The face on the front is some replaceable plywood backing.





11 comments so far

View revwarguy's profile

revwarguy

125 posts in 656 days


#1 posted 04-13-2013 04:17 AM

which magazine and which issue?

-- "72.6 per cent of all statistics are made up on the spot." - Steven Wright

View owennbw's profile

owennbw

15 posts in 700 days


#2 posted 04-13-2013 12:15 PM

Add a rotating handle at the end of your crank, similar to the knob on a tablesaw wheel and that should make the turning less burdensome. Novel idea though and looks to produce a decent joint.

View Blackbear's profile

Blackbear

109 posts in 974 days


#3 posted 04-13-2013 12:59 PM

Haha, the plans actually do call for that nowen1975, I just haven’t found one I like quite yet. I definitely think that will make the turning easier, but it is still quite a bit of turning!

revwarguy, if I can find it I’ll post back. That magazine is in a stack of 100 others!

View mbmattvt's profile

mbmattvt

65 posts in 666 days


#4 posted 04-13-2013 03:56 PM

Looks like a nice jig. Would you post the plans or where to get them?

-- "There are three kinds of men. The ones who learn by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves." --- Will Rogers

View Greg D's profile

Greg D

199 posts in 706 days


#5 posted 04-13-2013 06:10 PM

Looks simple. Nice choice. Love looking through old magazines for new projects. Just the project I’ve been wanting to make.

Thanks for sharing!

-- Greg D, Cen. CA, "Keep it on the Level, Do it Right the First Time!"

View Blackbear's profile

Blackbear

109 posts in 974 days


#6 posted 04-13-2013 08:26 PM

You guys sent me off on a magazine organizing spree. I finally found the issue; Wood magazine issue 27, February 1989. Good hunting!

View Homebrew's profile

Homebrew

64 posts in 941 days


#7 posted 04-13-2013 09:19 PM

Nice. I was just going to do this – literally two nights ago, but I have another project needing to be finished up. Should be super simple and very accurate. I was going to add some sort of hand wheel to ease the cranking a bit, and possibly add a gear clicker – I saw the clicker somewhere on woodgears…It might actually be used on his box joint jig, but I can’t remember which machine he used it on for sure. It just adds more precision and takes away the need for you to look at the marker as much.

-- Scott Rieman

View NormG's profile

NormG

4566 posts in 1759 days


#8 posted 04-13-2013 09:48 PM

Great jig, thanks for sharing

-- Norman

View Randall Sly's profile

Randall Sly

48 posts in 635 days


#9 posted 04-13-2013 09:51 PM

may I suggest http://lumberjocks.com/projects/46595 from fellow LJ kiefer to ease the turning struggles

-- I could retire nicely if I could sell my experience for what it cost me.

View Blackbear's profile

Blackbear

109 posts in 974 days


#10 posted 04-14-2013 01:04 AM

Sharp looking hand wheel. It looks a tad big for this jig; the handle on this one is only about 2 1/2” long.

View _Moose_'s profile

_Moose_

40 posts in 1019 days


#11 posted 04-26-2013 12:02 PM

Blackbear, thanks for posting this. I used your photos & made one of these yesterday. Works very well. For the threadall & the nuts I’m into it about $4.50.

Great post.

-- _Moose_ Hooper, UT

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