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Krager Woodworking jigs #1: A universal jig for precise finger joints and small wedges

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Blog entry by Dan Krager posted 806 days ago 3072 reads 1 time favorited 9 comments Add to Favorites Watch
no previous part Part 1 of Krager Woodworking jigs series Part 2: Loose Tenon, Precision Fence, Dowel making, Good looking turnbuckles, Router MultiJig »

Here is a video I made about a universal precision box joint and small wedge jig. Quick and easy to set up, cheap to make, it replaces the tedious one at a time process usually done. The insidious “creep” of finger joint jigs is eliminated. It safely makes small wedges precisely and cleanly. Thank you for watching. The last 10 seconds got truncated due to a time limit on Photobucket. Better way?

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-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com



9 comments so far

View gfadvm's profile

gfadvm

10551 posts in 1288 days


#1 posted 806 days ago

That is a very useful appearing jig and you did a nice job with the video. I’d be interested in a’ how to’ to build this jig.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Dan Krager's profile

Dan Krager

1465 posts in 832 days


#2 posted 805 days ago

Thank you. I’ve already had an offer to buy one… Sounds like the two could work together. Hmmm.

-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com

View kapanen's profile

kapanen

105 posts in 1380 days


#3 posted 804 days ago

I like it as well. Add me to the ‘how to’ list. or the buy list….

-- "Art washes away from the soul the dust of everyday life"....Pablo Picasso

View Dan Krager's profile

Dan Krager

1465 posts in 832 days


#4 posted 804 days ago

OK. I’ll make some sketches. Google Sketchup OK? PDF? Other? You can send your email address to me privately on my web site if you wish. The sketches will be free.

http://kragerwoodworking.weebly.com/contact.html

Give me a few days to complete the sketches. Thank you for your interest.

I’ll be willing to build them for you or send you a kit to build yourself. I’ll include everything you need except the miter gauge. The cost will be $279 built, $179 for the kit, plus shipping. Let me know in the comment section what your interest is.
Dan

-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com

View Dan Krager's profile

Dan Krager

1465 posts in 832 days


#5 posted 804 days ago

Oh, BTW. The miter gauge might be deceptive. It looks like the sloppy old Craftsman that it was. I souped it up. If your miter gauge is the SLIGHTEST bit sloppy, this jig is almost worthless unless you know how to handle backlash. Because of the long distances involved, any slop is magnified. Before I fixed it, my gauge let the jig wobble almost 1/8”, unacceptable, and the slop was only 0.003” inch.

I tried the center punch method, but it was far too worn for that. I ended up drilling two holes crosswise (for roll pins) and sawed the bar in half clear down almost to the pivot. You can see the saw cut if you look carefully in the video. After inserting the roll pins to keep the halves aligned in their original orientation, I drilled and tapped a set screw hole through only one half right next to the roll pin. Driving the set screw home spreads the halves removing any slop very accurately. I also split the bar at the heel right through the screw holes that hold the pointer block almost up to the pivot. Another set screw at the heel makes the entire bar nicely tight but not sticky.

I polished any nicks and dings from the bar and saw slot (this used equipment had been abused). Works really well now.
Dan

-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com

View Dan Krager's profile

Dan Krager

1465 posts in 832 days


#6 posted 804 days ago

OK. The fence sketches are posted on my web site blog at:
http://kragerwoodworking.weebly.com/blog.html
You can download the Sketchup8 file from there.

Dan

-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com

View steliart's profile

steliart

1807 posts in 1286 days


#7 posted 803 days ago

thanks for sharing, gr8 jig

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

View Dan Krager's profile

Dan Krager

1465 posts in 832 days


#8 posted 795 days ago

The dimensioned jig sketch is now posted on my web site blog at:
http://kragerwoodworking.weebly.com/blog.html
You can download the SketchUp8 file from there. It is designed to be used with my “standard” fence system (above) but you can surely mount it on any suitable miter gauge fence. This jig safely and very accurately cuts multiple box sides and ends at the same time. As shown in the video, it also safely and very accurately cuts small wedges in multiple pieces. I didn’t show the threaded rod and crank assuming you could figure it out, especially with the video. Don’t forget that the horizontal hole in the little block on the dowel is threaded. I used a standard 3/8-16 metal cutting tap. Oh, I used 12” veneer press screws for maximum enjoyment. Enjoy and be safe. I have entered this in Stumpy’s jig contest.

-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com

View Dan Krager's profile

Dan Krager

1465 posts in 832 days


#9 posted 795 days ago

I should probably mention that I use layers in SketchUp to hide and reveal features. The fence sketch has several layers, not all shown in the posted picture above, e.g. dimensions.

-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com

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