Box Joint Jig that cuts 10 boards at a time - Page 2 - Woodworking Talk - Woodworkers Forum
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post #21 of 28 Old 06-01-2020, 10:26 AM
CharleyL
 
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I don't think you fully understand my comment, but you likely will after using your jig. I hope the best for you.

Charley
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post #22 of 28 Old 06-01-2020, 12:27 PM Thread Starter
Mark Jones Ozark
 
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Quote:
Originally Posted by CharleyL View Post
I don't think you fully understand my comment, but you likely will after using your jig. I hope the best for you.

Charley
I agree the key on most jigs has to be the same as the saw kerf. This jig is much different than most keyed fingerjoint jigs. On this jig on the same board end you can cut any combinations of mixed size finger joints. The pin is (the key) that goes between these fingers is what has to be exactly right in most cases a few mil less than the size of the saw kerf.

I have made many of the simple keyed box joint jigs over the years that use a fixed dado blade size to make a box joint. This jig is different than those it uses only a single normal table saw blade to cut box joints and that is why I like this jig. With only rearranging the fingers(dominoes) on the back side of the jig one can cut any size of box joint in 1/4" increments.

There is some great instruction on youtube on how to fine tune those jigs to make a perfect joint. In my search for a box joint jig I discovered almost 10 different versions possibly more if I think about it of the box joint jig. I think I have watched every Box joint video there is on youtube at least 3 times over. HA!

Thanks for the feed back. It's good to talk these things over and get opinions.
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post #23 of 28 Old 06-02-2020, 07:51 AM Thread Starter
Mark Jones Ozark
 
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Cutting the fingers down to 2.25" long by 1.5" wide eliminated the flex I was getting. I added some more weight to the jig by adding a shelf to raise the newly cut fingers. Then adjusted the hinged keeper made it 3/4 wider. Moved the finger tightening knob up and fine tuned it with a metal plate at the end of the knob bolt.

Will add a aux fence to add in the 2 T slot tracks. I will have 2 t-slots tracks about 5" between them with a full 1 1/8" of screw thread to hold them tight.

Will add that tonight after work and do some sanding on the jig and take some pictures. It's tight. Came out nice. It's big.
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post #24 of 28 Old 06-04-2020, 06:52 AM Thread Starter
Mark Jones Ozark
 
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Made my first cut making 1/4" box joints. After removing the flex out of my jig fingers the jig works great. Will make up one more 90 degree fence to sandwich the 10 boards in while I cut the box joints all at one time. I need to round over the edges and sand on it and cover up the Knob holes and tear out on the plywood but that won't take long to remedy.

I am very pleased with this jig. A few more simple modifications yet should have this finished and cutting more box joints this weekend.

Here is about 30 pictures of the jig and the box joints it cut. Will have more as I go along with this at this link.

http://readyrangers.tzo.com/2020BoxJ...oxJointJig.htm
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Last edited by Mark Jones Ozark; 06-04-2020 at 07:01 AM.
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post #25 of 28 Old 06-08-2020, 04:36 PM Thread Starter
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Just about to quit making plywood boxes and go for some walnut and maple. I cut out 6 sides last night at a time and they were pretty tight. The 1/4" joint look the best to me. Very tight. The 1" box joints were a quick cut but only 4 fingers holding them. I have seen some of these used in 3/4" boxes.

It's fun making these various sized joints on the fly.

I am thinking of adding a thumb wheel that will allow me to move the sled a 1/8" at a time so the inner cuts would be just a push and go thing.

Last edited by Mark Jones Ozark; 06-08-2020 at 06:05 PM.
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post #26 of 28 Old 06-09-2020, 01:06 AM
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Quote:
Originally Posted by Mark Jones Ozark View Post
There are many versions of this jig on the web. This one would allow me to cut a stack at one time. Have any of you made one of these?

How To Make a Box Joint Jig - YouTube
I made one of those MANY years ago. Yes, it worked. It was tedious to use. I found that there was too much slop in the threads. I had to put a plastic wheel indicator on the thread and adjust 1/256 per cut.

I wound up spending the few hundred dollars for an Incra for the router table. Using their templates I can set up and do box joints in less time than it took to type this.

Rich
Just a dumb old paper boy from Brooklyn, NY
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post #27 of 28 Old 06-09-2020, 02:17 PM Thread Starter
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Originally Posted by NoThankyou View Post
I made one of those MANY years ago. Yes, it worked. It was tedious to use. I found that there was too much slop in the threads. I had to put a plastic wheel indicator on the thread and adjust 1/256 per cut.

I wound up spending the few hundred dollars for an Incra for the router table. Using their templates I can set up and do box joints in less time than it took to type this.
I figured the threads would cause me to make many mistakes. I didn't make one with threads or a wheel or a crank. The Jig I made uses the dominoes. I can make any combination of 1/4" and bigger on the fly with a setup up or change in less than a minute. Just rearrange the dominoes to the size of box joints I want. I did find that if the dominoes flex even a bit it is no good. So I cut the dominoes down to 1.5"x 2.25" tall. The drill bit index pin sticks down about a half inch into these pins. I would make the next one with shorter dominoes so no flexing could happen.

This jig can cut 24 quarter inch thick boards at one clamping. I can't wait to pull in some maple and walnut so these joints will go WOW!
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post #28 of 28 Old 06-19-2020, 11:55 AM Thread Starter
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Wow all of a sudden it's 90 plus degrees outside. Pulled out the Walnut that was stickered in the shed and resawed it down to 5/8" boards then jointed one surface and surfaced the other side down to 3/8" thick by 4" wide. Now to resaw some maple and do the same thing. Looking to make some box joints this next week with this stuff. On vacation and then retirement hits me 2 weeks after that! Woo Whoo!

I may put a mirror on the front fence of the boxjoint sled so I can see what joints I may need to clean up while using the table saw. This thing is so big and safe you never see the blade cutting.
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