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Twelve sided Segmented Bowl jigs

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Project by CalgaryGeoff posted 06-24-2013 04:43 AM 3507 views 23 times favorited 12 comments Add to Favorites Watch

These are two jigs I use when making twelve sided segmented bowls. Pictures 1,2,3 show the table saw being used with the 12 sided segmented bowl segment cutting jig. It’s set at 15 deg to get the angles to work. The sled base is made of 3/4” birch ply, other woods are red oak or maple, just what I had at build time. Front and back pieces provide strength and a handle. Middle piece with clamps is the fence I cut from, and both clamps have wing nuts for quick adjustments. The last big piece on the sled is a blade guard to protect my sausage fingers while I clear the cut segments from the sled Pic 2 and 3 show this best with blade. I made the fence 7/4 thick to enable me to cut two identical bowls at the same time, or three depending on thickness of rows. Of course one at a time is fine too. I use a clamp to hold my length stop block for now.

Pic 4 shows my segment piece sanding sled I use with a 12” disk, 80 grit paper. This is a Malcolm Tibbets idea from one of his books. It sets the final segment length, final angle and cleans up the cut ends nicely.

Pic 5 shows the underside of the sled and its two runners as I don’t want any error due to sled wiggle. Screws are added to both runners to adjust as needed to keep wiggle to a minimum.

Last pic shows the options provided by such a tall fence for cutting one or two bowls at a time.

Thanks for looking.

-- If you believe you can or can not do a thing, you are correct.





12 comments so far

View TopamaxSurvivor's profile

TopamaxSurvivor

14849 posts in 2361 days


#1 posted 06-24-2013 05:38 AM

I like it. Nice work.

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

View steliart's profile

steliart

1808 posts in 1373 days


#2 posted 06-24-2013 06:59 AM

I love the idea
thanks

-- Stelios L.A. Stavrinides: - I am not so rich to buy cheap tools, but... necessity is the mother of inventions - http://www.steliart.com --

View Roger's profile

Roger

14847 posts in 1489 days


#3 posted 06-24-2013 12:00 PM

Nifty jig. I like the toggle clamps extended bolts for holding things in place

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

View ldl's profile

ldl

1135 posts in 1050 days


#4 posted 06-24-2013 12:50 PM

I like this idea. I just finished a segment bowl and cut the pieces on my SCMS. I had to do a little sanding on the two halves to make them mate. This would take any variation in the SCMS out.

-- Dewayne in Bainbridge, Ga. - - No one can make you mad. Only you decide when you get mad - -

View lew's profile

lew

10088 posts in 2440 days


#5 posted 06-24-2013 01:02 PM

Great work, Geoff! I really like the extra stability/accuracy afforded by the double runners.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View Lee A. Jesberger's profile

Lee A. Jesberger

6663 posts in 2665 days


#6 posted 06-24-2013 01:41 PM

Jigs are a great way to increase both safety and accuracy, not to mention repeatability. Nice post.

Lee

-- by Lee A. Jesberger http://www.prowoodworkingtips.com http://www.ezee-feed.com

View MShort's profile

MShort

1727 posts in 2103 days


#7 posted 06-24-2013 01:51 PM

Nice jig setup.

-- Mike, Missouri --- “A positive life can not happen with a negative mind.” ---

View luv2learn's profile

luv2learn

1761 posts in 988 days


#8 posted 06-24-2013 03:44 PM

I love jigs especially the one’s that keep hands and fingers out of harms way. Nice build Geoff.

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

View oldnovice's profile

oldnovice

3788 posts in 2053 days


#9 posted 06-24-2013 05:52 PM

I have always been a believer in good jigs for repeatably and safety.

They are helpful when setups change and another piece, or two, are required as a jig serves the purpose for making a duplicate piece.

-- "I never met a board I didn't like!"

View Blackie_'s profile

Blackie_

3502 posts in 1198 days


#10 posted 06-24-2013 09:53 PM

Thanks for sharing Geoff.

-- Randy - If I'm not on LJ's then I'm making Saw Dust. Please feel free to visit my store location at http://www.facebook.com/randy.blackstock.custom.wood.designs

View wuzfuzde's profile

wuzfuzde

24 posts in 1335 days


#11 posted 06-25-2013 11:20 AM

On behalf of my remaining fingers ..Thank you for some fine ideas on the jigs.

View CalgaryGeoff's profile

CalgaryGeoff

937 posts in 1167 days


#12 posted 06-27-2013 03:06 AM

Thanks to everyone for the comments. If this jig can save just one finger it was worth the effort to post. :-)

-- If you believe you can or can not do a thing, you are correct.

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