MDF chuck jaws

Re: MDF chuck jaws

David Walser

If you were to make the jaws out of two layers of MDF, you could turn a recess into the top layer to give you an "adjustible" jam chuck.

Re: MDF chuck jaws

john Lucas

This is an adjustable jam chuck, sort of.

maple jaws

Ralph Lindberg

Dale Larson does something like this:

He adds pieces of 2x (8/4) maple (or other hardwood) to the colejaws of a chuck.

Then turn a recess into the wood and "jam" chuck the bowl rim to the jaws.

Of course it takes a continuous rim, ie not natural edge.

But it does allow an oval bowl to be reverse turned so the foot can be finished.

Re: maple jaws

john Lucas

I have cole jaws but you can't spin them very fast. I like to turn my mirrors at a higher speed for cleaner cuts. this smaller version can turn pretty fast. I like the concept of adding wooden jaws to the cole jaws for special applications. I might make a set for that purpose.

I usually have 3 or 4 wooden platters that I use when a need a sacrificial board for a special turning. I can glue or screw turning to these in just about any configuration because they are sacrificial.

Re: MDF chuck jaws

Dale Bonertz

Out of curiosity John, do you need those bolts straight out. You said it is little dangerous. If you don't need them straight out couldn't you put them in at a slight angle creating a dove tail affect on the holding side? May may them a little safer.

Re: MDF chuck jaws

john Lucas

The dangerous part is on the backside of the jaws. I want the screws adjustable in length because of my weird designs I never know what I'll have to put on there. I tend to over design things. This is designed to roughly hold my hand mirror heads and since I'm working out new designs I need options.

Re: MDF chuck jaws

John K Jordan

I might need to make some of those - I like the long adjustable support posts. I think I'd like a little wider tips somehow.

For the spinning finger modifiers on the back, how about wrapping them with tape or a big rubber band cut from an inner tube? And maybe use hex socket cap screws instead of sharp flat-head screws?

For someone who who wants custom jaws without making them, Teknatool makes nylon jaws that can be cut to fit:

http://www.amazon.com/NOVA-6021-Soft-Chuck-Accessory/dp/B0064JJEGW/ref=sr_1_51

JKJ

Re: MDF chuck jaws

john Lucas

John I really don't think it's that much of a danger. Since the jaws stick out further than the bolts I doubt I would ever reach behind them. If I'm that nervous I can always just buy the bolts as long as I need them instead of these extra long ones. It will probably be a rarely used accessory. I did consider making some tapered wooden jaws to fit the screws. Drill and tap the wood and then coat the outside with Plasti-dip.

Re: MDF chuck jaws

John Veerkamp

or put a rubber band cut from an inner tube around the protruding bolts.

Re: MDF chuck jaws

Barry Irby

I like it and I have something similar. Made mine out of baltic birch plywood. bought a spare set of the the rubber grippers that came with my cold jaws and use them on my home made ones.

Your MDF makes me a little nervous. I find it brittle and would be a little scared it would break at an inappropriate time. I trust the plywood more.

Re: MDF chuck jaws

john Lucas

Me too but this is only 6" in diameter and I won't be putting anything large on it. If I have any of the plastic left over when I build my new table saw inserts I'll remake these out of it. It's really tough stuff.

John Lucas, What about these? *LINK*

John Kaner

John, Here I go again, spending your money... LOL..,

These are like the ones they use on homemade Longworth chucks. Being silicone, and tapered, should hold well. I read where a guy used neoprene and froze them before drilling...

Part Number: 7-SR-R00-S

Top Diameter: 5/8" | .590" | 15mm

Bottom Diameter: 3/8" | .393" | 10mm

Length: 1" | 1.023" | 26mm

Durometer: 55

Material: Silicone

Please note: This company also has the green neoprene stoppers.




http://www.widgetco.com/silicone-rubber-stoppers