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Compound Angle Cutting Jig with Hold Downs for a Radial Arm Saw

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Project by Aggie69 posted 562 days ago 3439 views 3 times favorited 7 comments Add to Favorites Watch

I have developed a program to calculate cutting dimensions and angles for building 3 dimensional stars. 3-D Star Blog. Trying to cut narrow pieces for the stars at steep angles and bevels on my radial arm saw required some assistance.

I designed a simple jig that would clamp into the table in the fence joint, anywhere along the fence joint. You can make angle cuts to ~60 degrees left or right while leaving the saw carriage arm to run straight back and forth. You can bevel the saw carriage to ~70 degrees to create compound cuts on small pieces. Best of all, you can clamp down the workpiece and keep your hands way clear of the blade while your’re cutting! My normal 10” saw blade wouldn’t clear the top of the jig on bevels from about 20 degrees to 70 degrees. Changing out the blade to a 7-1/4” blade worked great.

Not wanting to cut up my jig everytime I make a cut, I use a piece of sacrificial 1/8” hardboard (Masonite) underneath the piece being cut. I used a mini-T track fastened into the wood angle arm and 1/4” x 20 hex head bolts and knobs for the hold down hardware (purchased from Peachtree Woodworking Supply). The clamps were homemade from 1” x 1/4” x 4”, 5”, or 6 “ash with 1/4” wide slots in the center. The ends of the hold downs were soft pine to reduce surface dinging of the held down wood. The pivot point bolt and the circle hold down bolt are 1/4” x 20 “elevator” bolts (flat head, ~1” dia). The jig table is MDF, the wood angle arm is ash, and the fence is pine.





7 comments so far

View a1Jim's profile

a1Jim

112014 posts in 2208 days


#1 posted 562 days ago

This is a great jig. This jig is a good reason to own a RAS

-- http://artisticwoodstudio.com Custom furniture

View luv2learn's profile

luv2learn

1678 posts in 934 days


#2 posted 562 days ago

I read your blog, and downloaded your XL program. Would you be open to doing a part 2 of your blog showing how you set up your star jig on the RAS and how you made the cuts. I am all about jigs and fixtures but I am also a visual learner :).

-- Lee - Northern idaho~"If the women don't find you handsome, at least they ought to find you handy"~ Red Green

View DIYaholic's profile

DIYaholic

13298 posts in 1306 days


#3 posted 562 days ago

Ditto what luv2learn typed!!!
Read,
Downloaded,
Requested,
Jiggy,
Visually Stimulated….

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

View Aggie69's profile

Aggie69

22 posts in 631 days


#4 posted 562 days ago

I plan to do a Part 2 in a few days. I have some photos of a 3-D star I built with a large undercut bevel on the outside edges of the star points like the program calls for. I want to build another one without that bevel. When I do, I’ll post a Part 2 and show it as a project also.

View DIYaholic's profile

DIYaholic

13298 posts in 1306 days


#5 posted 562 days ago

That sounds marvelous!!!
I’ll be sitting at my laptop, until such time!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

View JoeinGa's profile

JoeinGa

3169 posts in 638 days


#6 posted 562 days ago

I’m glad you guys asked, because I was all kinds of confused by just the written description! :-)

And hey Aggie… aVIDEO would be fantastic!

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View helluvawreck's profile

helluvawreck

15623 posts in 1498 days


#7 posted 562 days ago

That’s great jig. Very creative.

helluvawreck aka Charles
http://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

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