Adjustable Tablesaw Miter Jig

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Project by ratchet posted 2348 days ago 11800 views 120 times favorited 26 comments Add to Favorites Watch
Adjustable Tablesaw Miter Jig
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I was tired of picture frames and boxes having small gaps at the 45’s. Makes me crazy. So I decided it was time for a jig that has adjustable wings on both sides. I can now dial in 45’s with very tight joints. The new jig is safer than my old one as the blade gets buried in the center rail. The hold downs are adjustable in and out to accomodate varied stock width and height.

I may change out the SS 1/4×20 adjustment bolts for machine screws at some point and make a stop block and extensions for the wings to handle longer stock cuts. The entire carriage assembly dismounts for maintenance/upgrade.

Thought this might help somebody out there (as you all have helped me). Many thanks.

26 comments so far

View teenagewoodworker's profile


2727 posts in 2400 days

#1 posted 2348 days ago

thats cool. it looks like the one i saw someone online make on some website (not really sure which one). yours is much better though as you can dial in a perfect 45, have the hold downs, and its good that you took safety into consideration and buried the blade. great job!

View Scott Bryan's profile

Scott Bryan

27251 posts in 2454 days

#2 posted 2348 days ago

Hi rachet,

I have been thinking about making one of these. I have favorited it so I can use it as a guide when I get around to construction. Very nice idea.

-- Challenges are what make life interesting; overcoming them is what makes life meaningful- Joshua Marine

View tenontim's profile


2131 posts in 2376 days

#3 posted 2348 days ago

Good idea, Ratchet. The gaps happen to me all the time. What causes that, anyway? Maybe it’s time for a new eyeglass prescription. Sometimes I think I do better with my glasses off. I’ll put this one in my favorites.

View jcees's profile


946 posts in 2431 days

#4 posted 2348 days ago

Nice job. I built one awhile back that’s similar but didn’t have the “tweakability” of yours. However, I did create interchangeable backer boards for the different spring angles on certain moldings I was using at the time. That worked well and will be a feature on the next one I build. I say that because I loaned mine to a bud and he hasn’t returned it. He knows I’ll make a new and better one when I get around to it. He gets most of my prototypes anyway.

I’m going to have to consider your setup, looks like it works like a charm.


-- When one tugs at a single thing in nature, he finds it attached to the rest of the world. -- John Muir

View Grant Davis's profile

Grant Davis

615 posts in 2540 days

#5 posted 2348 days ago

This is on the list of to do’s

-- Grant...."GO BUCKEYES"

View poopiekat's profile


3596 posts in 2366 days

#6 posted 2348 days ago

I like your idea of adjustable stops! Makes it dead-on accurate!

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!

View Tom Adamski's profile

Tom Adamski

306 posts in 2403 days

#7 posted 2348 days ago

Very cool… That 45 degree angle is elusive. Looks like you have the tool to chase it down and nail it.


-- Anybody can become a woodworker, but only a Craftsman can hide his mistakes.

View juniorjock's profile


1930 posts in 2397 days

#8 posted 2348 days ago

Great jig Ratchet…..... and this would be a good jig to start that “tips and jigs” tab on the LJ home page we talked about a while back. I’ve got a woodworking buddy that’s on me all the time about building too many jigs….. but I have to listen to him, he gives me lots of good lumber. The last time I went to his house he gave me some cherry and said “son, try to build something besides a jig”........ he’s pretty straight forward like that.

View Thos. Angle's profile

Thos. Angle

4435 posts in 2594 days

#9 posted 2348 days ago

I like this adjustable rig better than the slider I have. I have to adjust mine with playing cards. I works but I think this one is better.

-- Thos. Angle, Jordan Valley, Oregon

View GaryK's profile


10262 posts in 2620 days

#10 posted 2348 days ago

Nothing like a good jig!

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

View Hawgnutz's profile


526 posts in 2708 days

#11 posted 2348 days ago

looks like a great jig to get those elusive 45 degree joints just right! Gonna have ito make one for myself for those picture frames. (One nice thing about working with almost hundred year old barnwood is that perfect miters sre not relly neccessary like on frame and panel construction.

I am designing one in my head and hopefully will get to it this summer.

God Bless,

-- Saving barnwood from the scrapyards

View Joel Tille's profile

Joel Tille

213 posts in 2876 days

#12 posted 2348 days ago

Rachet – Thanks for posting. I have one very similar to this one. except I loosen screws through the top to adjust. I will have to modify it to use the adjusting screws, this would reduce the time it takes to sneek up on that perfect 45.

-- Joel Tille

View Bradford's profile


1434 posts in 2455 days

#13 posted 2348 days ago

Great jig!

-- so much wood, so little time. Bradford. Wood-a-holics unanimous president

View Kevin's profile


293 posts in 2590 days

#14 posted 2347 days ago

great idea

-- Kevin, Wichita, Kansas

View Yettiman's profile


161 posts in 2370 days

#15 posted 2347 days ago

Many thanks for sharing.

I think your ajustments will also solve my crosscut sledge problem. I can make one of 89.x degrees or 90.x but never 90.

This way I can tweak it, and once right, super glue the nut, with locktight (can be removed if needed to reweek later).

Love the safety centre rail.

-- Keep your tools sharp, your mind sharper and the coffee hot

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