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Adjustable Box Joint Jig for a Router Table

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Project by Aggie69 posted 530 days ago 2356 views 8 times favorited 4 comments Add to Favorites Watch

Not having a table saw, I needed an adjustable jig for cutting box joints on my router table. I liked the design by Shop Notes that has been used by several others on Lumberjocks, such as Tyka's posting. The design is for use with a table saw, but with a few small modifications, it works very well with a router table.

My router table didn’t have an adequate miter T-track to use for sliding the jig, so I added 2 parallel aluminum miter T-tracks to my existing Craftsman router table and I added 2 miter T-bars to the bottom of the jig. The original design had a 3/4” thick board on the bottom of the jig to help serve as a ledge for the piece being jointed. On a router table, that increases the distance a router bit would need to extend above the table to an unacceptable height, so I eliminated the board. I purchased the miter T-track, T-bar, and knobs from Peachtree Woodworking Supply. The rest of the metal hardware was 1/2” metal L-brackets and 1/4” x 20 – hex bolts, washers, lock nuts, screw insert nuts, and flat headed “elevator” bolts. The wood was ash.





4 comments so far

View Diggerjacks's profile

Diggerjacks

1738 posts in 1737 days


#1 posted 530 days ago

Hello Aggie69

I like this jig with a lot of ajustable pieces

Can you post a picture of a joint made with your jig ?

Thanks for sharing

-- Diggerjack-France ---The only limit is the limit of the mind and the mind has no limit

View Knothead62's profile

Knothead62

2342 posts in 1560 days


#2 posted 529 days ago

Very good idea! BTW, your work is very neat!

View Paul Stoops's profile

Paul Stoops

321 posts in 1160 days


#3 posted 529 days ago

Very innovative adaptation! It’s hard to tell from your photos, but is the jig wide enough front to back or are the T-runners long enough to prevent tipping as you slide the fence back and forth over the router bit?

-- Paul, Auburn, WA

View Aggie69's profile

Aggie69

22 posts in 599 days


#4 posted 529 days ago

If you’ll look closely at the photos, you’ll notice that the T-bar is captured inside the T-track when it slides. The jig can’t lift up from the table.

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