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Compound Angle Sled

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Project by Jim Jakosh posted 10-30-2012 12:50 AM 2284 views 11 times favorited 22 comments Add to Favorites Watch

I have this new brain storm project I want to try that requires these little triangles cut at 72 degrees with a 4 degree angle on two sides. I was going to try to do them in the compound miter saw, but things that small are hard to hold safely in the miter saw. So I threw this little sled together where the parts are clamped solid and my hands are far away from the cut. I first cut the 36 degree angle on half of it and the tilted it 18 degrees off that cut side to get 72 degrees. I made the exact angle gages on my other sled with the sine bar on it and they checked out right on with the Wixie gauge.
The project with the little triangles might be done next week.
I use 5/8” 9 ply plywood for the whole sled. The runners are covered with slippery plastic.
...........Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!





22 comments so far

View Joe Lyddon's profile

Joe Lyddon

7889 posts in 2777 days


#1 posted 10-30-2012 01:18 AM

Looks like you got your 72 triangles!

Is the blade tilted 4*?

I usually put the slippery plastic strips on the bottom of the sled… each side of blade…
... I don’t think my sleds run on the bottom of the runners…

Looking fwd to the rest of your storm… LOL

Nice sled…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View jap's profile

jap

1237 posts in 779 days


#2 posted 10-30-2012 01:18 AM

nice jig, now i’m excited for the project.

-- Joel

View rance's profile

rance

4147 posts in 1885 days


#3 posted 10-30-2012 01:51 AM

Jim, I’ve found that one’s abilities to make jigs is in alignment with what they can create. And this one is a good one.

If it were me, I might consider cutting the 36 degree on the left side and the 72 (with the 4 degree shim) on the right side. No need to tilt the blade that way. Just a thought. :)

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View Grumpy's profile

Grumpy

19586 posts in 2576 days


#4 posted 10-30-2012 02:09 AM

A much safer option than the mitre saw Jim. Nice jig.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View Jim Jakosh's profile

Jim Jakosh

12090 posts in 1830 days


#5 posted 10-30-2012 02:15 AM

Hi Joe. Yes the blade is tilted at 4 degrees and both sides of that 72 degree triangle have to be tapered away at 4 degrees.
My saw does not have a groove for steel runner in the table.The center section is cut parallel to the blade on both sides. I have two pieces of plywood with the plastic on them that ride against the sides of that center section. the bottom of the sled is waxed to keep it slippery.

Thanks, Jap.

Hi Rance, I need the 4 degrees on both sides of that 72 degree angle. I think if I were to use a shim I’d be worried first, that I could make one accurate enough at that slim of an angle and then I don’t know how to hold it absolutely parallel to the cut edge. If it were to slip, the angle would not be true for the next step to glue these edges together. I find that it is easier to control if I clamp it flat to the sled or table and make the blade determine the angle- just my preference. It probably could be done with a shim.

I added a shot of how I set the 4 degree angle!
Thanks, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Bob Collins's profile

Bob Collins

1583 posts in 2408 days


#6 posted 10-30-2012 03:03 AM

That plywood is getting a hammering Jim, nice sledge and safer than that email I sent you. Cheers Bob.

-- Bob C, Australia. I love sharing as long as it is not my tools

View TopamaxSurvivor's profile

TopamaxSurvivor

15030 posts in 2401 days


#7 posted 10-30-2012 05:12 AM

Nice sled. Gluing up a bowl? ;-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View AJswoodshop's profile

AJswoodshop

1057 posts in 1001 days


#8 posted 10-30-2012 12:24 PM

Looks like a miter sled! Like the toggle clamp! I don’t like holding the piece down while I cut, toggle clamps are nice to have! Nice job on the sled, I’m sure it will make the pieces easier to cut.

-- If I can do it.....so can you! -AJswoodshop

View Roger's profile

Roger

15055 posts in 1529 days


#9 posted 10-30-2012 12:32 PM

Gr8 idea/s Jim. Nicely accesorized sled

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

View sedcokid's profile

sedcokid

2683 posts in 2323 days


#10 posted 10-30-2012 12:48 PM

Jim, Does your mind ever stop????? You are so creative. Great job, looking forward to seeing what you are going to use these pieces for ;)

Thanks for sharing

-- Chuck Emery, Michigan,

View Dusty56's profile

Dusty56

11679 posts in 2413 days


#11 posted 10-30-2012 12:49 PM

Great thinking on this sled (and so much safer as well ) : )

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

View Jim Jakosh's profile

Jim Jakosh

12090 posts in 1830 days


#12 posted 10-30-2012 01:19 PM

Thanks for all the nice comments on that sled. Now that I have it done, I have more projects scheduled for it that I used to make on the compound miter saw with a bit of difficulty.

G’day, Bob. Those little pieces int that video at 7.5 degrees were too tine for me to handle. Once I poured out the glue, I’d have them sticking to all sides of my hand LOL!!!

TOPO….......it is not a bowl..you’ll see! I hope it looks good enough to post.

AJ..look at Harbor Freight for cheaper toggle clamps. I found some there for $3. I like them because they are quick and my fingers are no where near that blade!!!!!!!!!!!!!!!

Chuck, that sled idea came to me while sleeping one night. Since I can make any accurate angle on the other sled, now I can use this one for angle cuts an rip a bigger hole in the black. I want to keep the other sled for straight cuts only.
.........................Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View AJswoodshop's profile

AJswoodshop

1057 posts in 1001 days


#13 posted 10-30-2012 04:07 PM

Your right Jim, I never like my hands close to the blade. For christmas I hope I get a set of push blocks, those are handy to have!

-- If I can do it.....so can you! -AJswoodshop

View Jim Jakosh's profile

Jim Jakosh

12090 posts in 1830 days


#14 posted 10-30-2012 05:17 PM

Hey AJ, that is one of the first projects you make in the shop:push blocks /push sticks. Don’t buy ‘em when you can make ‘em. Ask for router bits or clamps or sandpaper for Christmas!!!

When I run the table saw, I always have a push stick in each and unless I am cutting a big sheet of something.
I have a PVC pipe with about 30 of them in it so I know right where to get one. The ends are cut thin or torn up pretty bad on some but never my fingers…......Be safe, always!!!!!!.......................Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View sswilcox's profile

sswilcox

14 posts in 2073 days


#15 posted 11-02-2012 05:46 AM

My guess is a geodesic sphere of some sort. The Death Star, perhaps?

-- sswilcox, Oregon

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