Making a Longworth chuck

Excellent Jim! Thanks for posting this.

-- One of these hammers oughta fix that...

Although I’m not a turner, that Longworth chuck is really cool and looks like a lot of fun to layout and build. Good luck and thanks for sharing.

-- John C. -- "Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth." George Washington

Hey Jim. Thnx for the link Very good

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

Now I can take some of those ‘failed’ projects and finish them! Having this chuck will definitely be a problem-solver! Thanks for posting!

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!

Nice layout technique. Seems pointless to bring in the four slots in further than the others though. That part of the slot will never be used and also weakens the piece. Unless of course you remove the four other knobs when using that inner part.

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

Thanks for the tip! That makes it very simple and easy! ;-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence Wake Up America!! Please read; http://www.commondreams.org/view/2009/01/26-0

Hi Rance. I think that you can just use 4 pins on a smaller diameter with the deeper slots. I’ll have to lay one out to see if that is true. I did lay out a 6 pin chuck using his technique and I think that is the way I will go. I’m still thinking about making every other slot short on the 6 pin one. It looks like it will be strong enough if I don’t.

I was thinking about Corian for the plates. It is flat and stable and can be cut easily. I have to find a flange with a 1”-8 thread to get started.

............Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!!

These are handy Jim, I dont have one myself however, they do make it super easy to centre up and hold a bowl to finish of ther bottom. I’m sure a lot of the guys will have a go at this one, easy to make. I did make an oversized set of coles jaws when I had a patch of making irregular or wainey edge bowls.
BTW Jim, Just managed to score a rotary vane oiless Gast vacuum pump that had become surplace to a job (best part it’s free) so having a lot of fun making several vacuum chucks, dont know how I went so long without one.
Catch ya mate
Pete

-- Pete G: If you always do what you always did you'll always get what you always got

Looks great Jim, thanks for the post.

Thanks for sharing

-- Chuck Emery, Michigan,

Pete, that is cool to have a vacuum chuck. I’ve seed a few in use and they are slick to work with!!

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!!

Well I made a flange today- could not find one that I wanted with enough “meat” to it for all the holes I put in it.
It has 1”-8 thread 1 1/8 deep and the whole thing is 1 3/8 thick and 3 1/4” diameter with 8 1/4-20 holes in it. I laid out the plates in Corian and I’m having them cut at the Geek Group here in Grand Rapids on a CNC router to make them perfect. I was thinking I could do it with a router and pivot pin, but I would have needed a clear base plate to see through to stop the cut in the right place.

I saw one at our guild meeting on Tuesday and it was made from 2 sheets of 1/2” phenolic which looks like a good way to go- stronger than Corian and more stable than wood. I may have to make another bigger one…..........Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!!