Yet Another Box Joint Jig

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Project by rmac posted 07-22-2010 05:45 PM 13221 views 72 times favorited 31 comments Add to Favorites Watch

The dial and the screw on the table saw fence micro adjuster posted by BritBoxmaker a few days ago reminded me of a similar mechanism on a jig I made a few months ago. Instead of allowing precise adjustments to the fence, my jig makes it easy to make precisely spaced crosscuts. I originally intended it as a box joint jig, but it’s actually useful for other operations as well.

My jig is a variation on a standard crosscut sled. The basic idea came from Matthias Wandel's orignal box joint jig. Instead of a crank like Matthias used, I put a knob with a dial on mine to move the carriage crossways past the blade. Each mark on the dial represents 0.002” of carriage movement, so with a little planning, you can make any sort of box joint you want. At first I had numbers on the dial, but I found that the colored lines and dots on the dial shown in the pictures made it easier to use the jig without making stupid mistakes.

The first few pictures show the jig itself. The last few show some of the first joints that I made with it.

Update, November 13, 2011: There’s now an article on my blog with plans and lots more details about this jig.


-- My table saw laughs at hot dogs.

31 comments so far

View Dennisgrosen's profile


10850 posts in 2207 days

#1 posted 07-22-2010 06:20 PM

niice jiig
thank´s for sharing


View levan's profile


457 posts in 2071 days

#2 posted 07-22-2010 08:28 PM

I like your jig. May have to build one of these.

-- "If you think you can do a thing or think you can't do a thing, you're right". Henry Ford

View BritBoxmaker's profile


4587 posts in 2128 days

#3 posted 07-22-2010 09:10 PM

Well I never thought of using it like that! Brilliant. I’m going to have to try this. The colour coded dot system looks like a winner too. Well done.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

View a1Jim's profile


113836 posts in 2669 days

#4 posted 07-22-2010 09:50 PM

Great Idea Russ super jig

-- Custom furniture

View Kent Shepherd's profile

Kent Shepherd

2703 posts in 2378 days

#5 posted 07-22-2010 10:22 PM

Awesome Russ

Looks like a winner

-- She thought I hung the moon--now she just thinks I did it wrong

View rdjack21's profile


265 posts in 2019 days

#6 posted 07-23-2010 01:39 AM

Really nice jig. It reminds me of another similar jig I saw here that I’ve been thinking about making. Yours is considerably simpler though so I may make it instead.

-- --- Richard Jackson

View rmac's profile


198 posts in 2152 days

#7 posted 07-23-2010 03:17 AM


Yes. The jig I got my idea from was made by the same guy (Matthias Wandel) who built the really fancy one that you saw. That guy is a real genius.


-- My table saw laughs at hot dogs.

View Jim Jakosh's profile

Jim Jakosh

14432 posts in 2197 days

#8 posted 07-23-2010 05:17 AM

Nice idea to incorporate into a sled for super accuracy. Thanks for sharing!!

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View michelletwo's profile


2467 posts in 2107 days

#9 posted 07-23-2010 11:09 AM

MOVE OVER INCRA!!!! Russ, very clever.

View stefang's profile


14974 posts in 2426 days

#10 posted 07-23-2010 05:34 PM

Good jig Russ.

-- Mike, an American living in Norway.

View Paul2274's profile


330 posts in 2204 days

#11 posted 07-24-2010 03:40 AM

I like your jig.

Somehow from one man to another that just doesn’t sound right…... but what the heck….. I like your jig!


View Bricofleur's profile


1296 posts in 2285 days

#12 posted 07-24-2010 06:28 PM

Fully adjustable ! I like it too. Thanks for posting.



-- Learn from yesterday, work today and enjoy success tomorrow. --

View lou's profile


340 posts in 2534 days

#13 posted 07-25-2010 01:32 PM

great idea.i would like to make a copy if you dont mind.super job.

View rmac's profile


198 posts in 2152 days

#14 posted 07-25-2010 05:02 PM

lou: Copy away!

everyone else: Thanks for all the compliements, but credit for the idea really belongs to Matthias.


-- My table saw laughs at hot dogs.

View David's profile


182 posts in 2807 days

#15 posted 07-28-2010 07:03 PM

I got to thinking about using standard threaded rod for “lead screws” and the distance of travel per revolution (and partial revolution) of the rod (or nut). I made up a spread sheet for some of the standard pitches (number of threads per inch) and then if a divider head (disc) was fastened to the end of the rod for even increments of partial turns: what the travel distance would be. Example: If a standard ¼ – 20 screw was used: (20 threads per inch) then one turn would move the nut 1/20 inch or .050 inch. So for a half turn it would move .025, one third turn it would move .0166, and so on. Granted one will not maintain 4 decimal place accuracy due to the thread precision (or lack of) and backlash between the nut and rod threads. Here’s my chart if you want it ~ it’s in pic format so I could store it to share.

Now if we can get someone to draw up and post divider heads (circles with even increments)
Let me know if I have any errors and I’ll correct them; I did a random check on the calculations.


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