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Another Stumpynubs Box Joint Jig

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Project by RoodyJ posted 04-11-2012 11:55 PM 3745 views 10 times favorited 11 comments Add to Favorites Watch

I just saw William’s posting on the Stumpynubs Boxer and I wanted to also join the list of happy builders. Mine is made from MDF scraps and a few acrylic pieces I adapted to the design. The pre-slotted guide is acrylic cut on the jig itself, and mounted with three 6-32 screw studs for easy changing. The added stick-on tape on the side is a guide for measuring offset, variable spaced cuts if needed. My gears were created with more teeth than the design specified and laser cut by a friend who has an engraver/cutter. Thought this would add a little more accuracy to each turn of the screw. One thing I noticed on the jig that I had to fix (see detail photo) was that the repeatability was a little sloppy due to minor flexing and play in the hold-down screw and bearing. I just added a wood block and some nylon fence slide material to tighten up the thrust nut mounting and contact with the threaded drive rod. As long as I remember to use a backer when I cut the box joints to eliminate tear out, this baby really works well. Thanks Stumpy!

-- Jim, Maryland





11 comments so far

View BigFoot Products Canada's profile

BigFoot Products Canada

620 posts in 2049 days


#1 posted 04-12-2012 12:42 AM

Cool.. Where do we find the plans at?

View woodworm's profile

woodworm

14125 posts in 2246 days


#2 posted 04-12-2012 12:48 AM

Impressive jig!

-- masrol, kuala lumpur, MY.

View jumbojack's profile

jumbojack

1182 posts in 1280 days


#3 posted 04-12-2012 01:14 AM

Here ya go David:
http://www.etsy.com/shop/Midwesterntradingco

-- Made in America, with American made tools....Shopsmith

View DIYaholic's profile

DIYaholic

13564 posts in 1331 days


#4 posted 04-12-2012 01:44 AM

Looks quite impressive. I like the use of the acrylic, I would think it should be more durable than wood.

Great Job!!!

Now, you really need to DO a JIG for your JIG!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

#5 posted 04-12-2012 03:39 AM

Very nice

-- Practice does not make perfect. Only perfect practice makes perfect. Vince Lombardi

View StumpyNubs's profile

StumpyNubs

6192 posts in 1456 days


#6 posted 04-12-2012 01:08 PM

I like the idea you had for adding the block next to the quick release! If you’d made the part that the rod passes through out of hardwood, it may not have been needed, but the hold widens very quickly with MDF and that is a problem. I highly recommend hardwood for that back portion of the carriage.

If you find the hole in that MDF wears too much you can fix it by adding a 1” thick block of hardwood on top of the hole and swapping the rod out for a longer one to compensate.

Looks fantastic!

More great workshop ideas in every episode of Blue Collar Woodworking!

-- It's the best woodworking show since the invention of wood... New episodes at: http://www.stumpynubs.com

View RoodyJ's profile

RoodyJ

47 posts in 1522 days


#7 posted 04-12-2012 03:55 PM

The crank handle is cherry. If I had more cherry scraps, I probably would have made the jig out of cherry. Could then have displayed it in my living room…lol!

-- Jim, Maryland

View ChuckC's profile

ChuckC

691 posts in 1591 days


#8 posted 04-12-2012 04:36 PM

You can strengthen the hole in the MDF with some CA glue. It works well when you have to tap threads.

View eddie's profile

eddie

7316 posts in 1270 days


#9 posted 04-12-2012 05:53 PM

nice jig,Roody uve got it on my list behind the dove tail jig that stumpy has great build

-- Jesus Is Alright with me

View William's profile

William

9035 posts in 1498 days


#10 posted 04-12-2012 11:41 PM

Dang. Now I have to paint mine to look that pretty.
Great job.
I like the acrylic gears. I may redo mine later in half inch thick plexi glass. I find that using the right blade I can cut plexi glass with my scroll saw.

-- http://wddsrfinewoodworks.blogspot.com/

View steliart's profile

steliart

1807 posts in 1344 days


#11 posted 04-17-2012 02:07 PM

Very very nice build of the jig… love it

-- Stelios L.A. Stavrinides: - I am not so rich to buy cheap tools, but... necessity is the mother of inventions - http://www.steliart.com --

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