David's [aka Patron] double version of the jig? #3: Just kidding!

  • Advertise with us
Blog entry by degoose posted 06-13-2009 01:05 PM 3093 reads 13 times favorited 8 comments Add to Favorites Watch
« Part 2: OK the JIG! Part 3 of David's [aka Patron] double version of the jig? series Part 4: First attempt at the double curve LL »

Basic 1/4 ” plywood.. mark a line at a diagonal across the board.
NB. the sharper the angle the longer the piece that can be cut.
Inset two bearings on this line 19” on centre to enable the use of the 9.5” Radius template from the first jig with single curve. Fit a bolt in the righthand bearing and fit to the bearing in the base unit.. turn on bandsaw and cut the curve till you reach the line and then change pivot points to the left hand side of both the jig and the base unit and continue cutting .,. not all the way. I added a border of PH of course to reinforce the edges and to make it pretty lol
The rear of the jig has two Incra Buildit bolts and knobs to hold a strengthening strip to hold the two cut pieces together.
I then worked out where a blank 5’’ by 10’’ would be to the right of the cut and covering the cut.
The two clamp holders were then predrilled for the bolts for the the clamps, bolts fitted and the holders fixed to the jig with screws.

Bridge clamps were then fabricated similar to the other spiral jig. As you can see in the photos there are two positions for the movable fence. The clamps on the left need to be able to reach the movable fence in both positions. The clamps on the right need to hold the blank close to the cut line.

I used the template from the spiral jig to make the position line for the movable fence. I then made the first cut on the blank and then moved the cut to the line made with the template and then used this double curve to mark the rest of the the line for the fence.[ Using the first pivot point until the line is reached and then reposition to the righthand pivot point to continue cutting].

The second line is for the making of ‘worms’ .. just move the new double curved template [ movable fence] across 1 5/8”



I hope this is as clear as I have tried to make it.. If not please feel free to PM me and I will endeavour to make anything unclear more like mud. LOL
This is actually harder to blog than build.

-- Be safe.

8 comments so far

View patron's profile


13722 posts in 4681 days

#1 posted 06-13-2009 01:43 PM

i like the “worms” innovation !
just to throuw in a new ” curve ” ,
either of the radius can be different sizes ,
and it still works !
your addition of the strips really give it some sparkle !

you go boy !

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

View Karson's profile


35295 posts in 5741 days

#2 posted 06-13-2009 03:59 PM

Larry: I’m confused, but that’s not easy. I’ll just need to see you put it into use.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Appomattox Virginia [email protected]

View stefang's profile


17040 posts in 4674 days

#3 posted 06-13-2009 04:15 PM

I’ll get it after awhile Larry. Love the result. I will unashamedly copy it as soon as possible. Meanwhile it will be in my favorites with the others.

-- Mike, an American living in Norway.

View Beginningwoodworker's profile


13345 posts in 5013 days

#4 posted 06-13-2009 04:48 PM

Neat jig Larry.

View TopamaxSurvivor's profile (online now)


23337 posts in 5016 days

#5 posted 06-14-2009 09:36 AM

Neat jig alright, but too deep for me:-))

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

View Sivers's profile


44 posts in 4723 days

#6 posted 08-11-2009 03:08 PM

Wow! This is really slick. I love it.

View a1Jim's profile


118309 posts in 4917 days

#7 posted 08-11-2009 04:03 PM

These jigs amaze me, great job.


View Waldschrat's profile


505 posts in 4776 days

#8 posted 08-11-2009 05:07 PM

I agree, Looks like its quick to use and works well.

-- Nicholas, Cabinet/Furniture Maker, Blue Hill, Maine

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics