Miter Saw Acute Angle Jig

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Project by Bricofleur posted 05-14-2010 11:40 PM 8157 views 27 times favorited 12 comments Add to Favorites Watch

I’ve been thinking about making this jig for years. Since nice weather has arrived I have to make a picket fence. All slats will end to a sharp point, meaning I have to cut them at an acute angle. I used to do that on the tablesaw but each time I got several cutoffs flying around my head. No more !!!

The jig sits on the miter saw bed and is held down to the back fence with a spring clamp. Note that the fence of my saw is coated with PSA sanderpaper which prevents any shifting.

The jig is nothing more than a 1/4’’ plywood base and 3/4’’ plywood back and perpendicular fences. This latter must be square to the back fence and square to the base.

As shown, I clamp a workpiece to the perpendicular fence, slide the whole assembly to the line of cut (reason why I use a spring clamp), and then cut safely at an acute angle.

An alternative to using a clamp to hold the workpiece to the perpendicular fence is adding a backer board between the fence of the saw and the back fence of the jig (shown photos 1-2-3-6)). This way the workpiece rests against this backer board, which prevents the saw blade from catching and kicking it towards the back.

Finally done!

Find 20 more photos and construction details from this page of my website.



-- Learn from yesterday, work today and enjoy success tomorrow. --

12 comments so far

View ZeroThreeQuarter's profile


120 posts in 4028 days

#1 posted 05-15-2010 12:11 AM

that’s a REALLY good idea, ironically I was trying to make something similar, but hadn’t gotten it quite as fine tuned for some reason as yours is showing.

Thanks for this one! It’ll help me next time I make my new sawhorses!

J’vien juste de voir que tu viens du Quebec! De quel coin habites-tu?
I’m originally from Montreal (West-Island) live in Vegas now…

-- Your mind, much like a parachute, works best when open.

View Dusty56's profile


11863 posts in 4659 days

#2 posted 05-15-2010 01:46 AM

Great idea , my friend : ) I can’t tell you how many chances I’ve taken making acute angle cuts without this jig of yours…never again ,now that you’ve shared this with us : ) Thank you sooo much !

-- I'm absolutely positive that I couldn't be more uncertain!

View Bricofleur's profile


1480 posts in 4164 days

#3 posted 05-15-2010 01:54 AM

Yep, this will definitely help building sawhorses, particularly for cutting the legs at an acute angle.

Je suis né et je reste dans la région de Montréal. Tout un changement que de lire du frainçais sur LJ !!!



-- Learn from yesterday, work today and enjoy success tomorrow. --

View patron's profile


13716 posts in 4312 days

#4 posted 05-15-2010 02:27 AM

another winner !

serge ,
you are a master of simplicity ,

well done !

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Bricofleur's profile


1480 posts in 4164 days

#5 posted 05-15-2010 03:46 AM

Hey David – Being called a master by a master! Well, thanks!



-- Learn from yesterday, work today and enjoy success tomorrow. --

View Diggerjacks's profile


2329 posts in 4109 days

#6 posted 05-15-2010 08:30 AM

Hello Bricofleur

A nice jig

Je suis d’accord avec toi un peu de français cela fait du bien.

A quand la finition des 2 meubles qu’on peut suivre sur ton blog ?

Bonne journée

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

View BritBoxmaker's profile


4611 posts in 4007 days

#7 posted 05-15-2010 11:41 AM

Elegantly simple. Tu as bien fait, Serge.


ps My French is a little rusty, please correct if you wish.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

View Bob Kollman's profile

Bob Kollman

1798 posts in 4161 days

#8 posted 05-15-2010 04:04 PM

I really like your jig! Looks like you could easily knock out 50 or so pickets an hour with that set up.

-- Bob Kenosha Wi.

View a1Jim's profile


118153 posts in 4548 days

#9 posted 05-15-2010 06:13 PM

Well done Serge simple but effective


View stefang's profile


17040 posts in 4305 days

#10 posted 05-15-2010 08:35 PM

Thanks for sharing Serge. A great jig worth copying for every miter saw owner.

-- Mike, an American living in Norway.

View falegniam's profile


335 posts in 3923 days

#11 posted 05-16-2010 06:25 AM

very accurate, and safe. excellent idea. i like that a lot.

-- If you work you eat - If you don't work, you eat, drink, and sleep.

View Bricofleur's profile


1480 posts in 4164 days

#12 posted 05-16-2010 04:40 PM

Diggerjack – La suite des meubles est pour bientôt car la santé a pris le dessus sur la maladie. Je m’y remets cette semaine.

Martyn – Your French doesn’t look rusty from here !

Bob – 50 pickets an hour? No problem with this jig, and also with the fact that I’ll use my fast action Kreg pocket hole jig vise clamp to hold the pichets onto the jig. By the way, I use them all the time in the shop. They are real time savers.



-- Learn from yesterday, work today and enjoy success tomorrow. --

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