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Hickory Crib and GIANT Circle Cutting Jig

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Project by JoshLawson posted 05-05-2012 05:48 PM 3074 views 2 times favorited 11 comments Add to Favorites Watch

Here’s a crib I made a couple of years ago, it’s very similar to two other cribs that I’ve made. I don’t particularly like working with Hickory, but it looks pretty good so long as you are going for wild color changes.
One thing I thought you fellow LumberJocks might be interested in is the Jig I made to cut giant circles (16’ diameter)

It’s a pretty simple jig, I had one of my friends CNC some 1/2” polycarbonate base plates for the router end and the pin (which sets the center of the circle). Then I connected the two pieces with some T-Nuts and an 8’ piece of 80/20 extruded aluminum T-Slot stock. The beauty of the 80/20 is that it provide an infinitely adjustable radius.

I’ve used it on a number of projects and it really is a great jig to have around. With a good solid carbide spiral bit, it cuts perfect arcs, every time. I just do a quick touch up with sandpaper and it’s good to go.

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-- Josh Lawson - Ankeny, Iowa





11 comments so far

View indefatigable's profile

indefatigable

10 posts in 1412 days


#1 posted 05-05-2012 06:38 PM

Nice! I really like the smooth curves. Good job!

View BigTiny's profile

BigTiny

1667 posts in 1791 days


#2 posted 05-05-2012 07:09 PM

Nice jig, but I’d worry about the pin coming out since it doesn’t seem to be secured. I’d have used some sort of lock on the pin.

Paul

-- The nicer the nice, the higher the price!

View JoshLawson's profile

JoshLawson

63 posts in 1907 days


#3 posted 05-05-2012 07:13 PM

The Pin really hasn’t been much of a concern at all, it’s buried about an inch deep in an interference fit hole in the wood (really snug) and the in the polycarbonate is also really tight. The biggest thing going for it, is there really isn’t any non-shear forces in the setup.
That said, I’m sure it wouldn’t hurt, it’s just not really necessary.

-- Josh Lawson - Ankeny, Iowa

View Sodabowski's profile

Sodabowski

2196 posts in 1736 days


#4 posted 05-05-2012 07:26 PM

Whoa, so when are you building that giant 16’ round table for King Arthur and his doods? ;) Nice crib :)

-- Thomas - Pondering the inclusion of woodworking into physics and chemistry classes...

View gervase's profile

gervase

11 posts in 1120 days


#5 posted 05-05-2012 07:53 PM

I so like this jig & it’s simple construction. I have made arcs before & used an MDF contraption I’ve made in a hurry. It worked but this looks like a treasure & I need one as I have a project I am about to start. You lead the way…
BTW the cribs look ace as well

-- Gervase..... keep your wood as long as you can as long as you can

View LittlePaw's profile

LittlePaw

1571 posts in 1981 days


#6 posted 05-06-2012 01:09 AM

Great jig. I love it!

-- LittlePAW - The sweetest sound in my shop, next to Mozart, is what a hand plane makes slicing a ribbon.

View doncutlip's profile

doncutlip

2832 posts in 2459 days


#7 posted 05-06-2012 01:55 PM

Nice work

-- Don, Royersford, PA

View Woodbridge's profile

Woodbridge

3132 posts in 1321 days


#8 posted 05-06-2012 03:32 PM

Nice crib and a pretty serious looking and large circle cutting jig! You have also got a pretty good looking workbench.

-- Peter, Woodbridge, Ontario (peter.marcucci@rogers.com)

View Martyroc's profile

Martyroc

2708 posts in 1209 days


#9 posted 05-07-2012 10:47 PM

The crib looks great, i like the color variation. That’s a serious circle cutting jig :)

-- Martin ....always count the number of fingers you have before, and after using the saw.

View DocSavage45's profile

DocSavage45

6040 posts in 1745 days


#10 posted 05-27-2012 05:15 PM

Damn, fits on that bench! Two good ideas, but no space for such a long bench to get the arc. Thanks for sharing

-- Cau Haus Designs, Thomas J. Tieffenbacher

View sscartozzi's profile

sscartozzi

47 posts in 663 days


#11 posted 09-15-2013 12:57 AM

Nice job. I’m also envious of the size of you work bench.

-- Steve, Malvern, PA

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