30 Degree Jig for Table Saw

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Forum topic by onestop posted 03-31-2015 05:30 PM 2050 views 0 times favorited 8 replies Add to Favorites Watch
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4 posts in 1153 days

03-31-2015 05:30 PM

Topic tags/keywords: jig tip tablesaw

For some reason i am having a really difficult time trying to figure out how to build a jig for my table saw that will allow me make 30 degree cuts on each corner of a piece of wood. In my head it seems as though once you make your first 30 degree cut your reference point for the complimentary cut goes away and the workpiece is no longer at 90 to the jig.

You can see what I’m after in the attached image. I know this would be rather simple on my miter saw but it’s been giving me grief lately with some sort of front to back alignment issue. I’ve squared the fence over and over to verify that’s it’s 90 with the blade but for some reason it wanders off the cutline by about 1/16” over the length of the cut.

But I digress, in the meantime I’d like to build a jig that will allow me to make the cuts in the image over and over if possible without adjustment each time.

8 replies so far

View darinS's profile


709 posts in 2867 days

#1 posted 03-31-2015 06:59 PM

It appears that you are trying to cut the ends at a 30° angle, and you want to use your table saw. If so, you could easily do something similar to this and modify it to 30° since it appears adjustable to many different angles.

If you don’t need the adjust-ability like that, you can always attach the fence permanently.

-- They say many people die because of alcohol. They never realized how many of them are born because of it.

View hotbyte's profile


991 posts in 2976 days

#2 posted 03-31-2015 07:10 PM

Seems like something you could do with miter gauge and miter gauge fence using a stop block at least half width of your piece being cut to ensure length is kept consistent on cuts.

Oops…Unless the piece is too wide for miter gauge…is the 4-1/4 length of just that one angled cut?

View Ghidrah's profile


667 posts in 1222 days

#3 posted 03-31-2015 07:38 PM

Even if you attach a long enough backer to the miter gauge there’s nothing to keep the mat stabile as you slide it into the blade. However if one cuts a section of 1/2” ply or MDF and makes a temp miter slot guide with DS tape and slides it up to a miter gauge set at 30° one might attach a backer to it and a toggle clamp to stabilize the mat.

-- I meant to do that!

View dhazelton's profile


2767 posts in 2297 days

#4 posted 03-31-2015 07:53 PM

I have to think a miter saw would be better for repeatability.

View Ghidrah's profile


667 posts in 1222 days

#5 posted 03-31-2015 08:09 PM

Or you could rough cut the excess off then make a 30° jig and finish it with a router

-- I meant to do that!

View mrg's profile


826 posts in 3000 days

#6 posted 03-31-2015 08:50 PM

Miter gauge will work, set to 30 cut the piece laying flat and flip. Put a stop block on the end and you will be in the same spot.

-- mrg

View onestop's profile


4 posts in 1153 days

#7 posted 04-03-2015 11:44 AM

Thanks for all the helpful advice…I made a quick and dirty jig that allows me to mass produce these cuts a few at a time. I’ll try post a pic later.

View lunn's profile


215 posts in 2309 days

#8 posted 04-03-2015 12:22 PM

mrg that’s how I do it !

-- What started as a hobbie is now a full time JOB!

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