Donut for a friction chuck

[Alan Weinberg]

Needed a way to reverse a piece with an irregular opening to work on bottom. Grandson’s toy helped.

 

[Mick Fagan]

Now that is thinking outside of the square!

 

[robo hippy]

Hmm, one of our dog's chew toys is a rubber type of doughnut. The dogs don't chew on it any more, they like rubber tires with peanut butter on them. I might have to try that one. Oh, it was pink in color. We have 2 pit bull mixes and they have to chew on some thing....

robo hippy

 

[Kent Reisdorph]

Needed a way to reverse a piece with an irregular opening to work on bottom. Grandson’s toy helped.

Was it stiff enough to keep the piece true? I have done something similar with a jam chuck with a partially hollowed center. I use a piece of 3M Scotchbrite pad for cushion, cutting a donut shape when needed. Sometimes I can get by without the donut.

 

[Alan Weinberg]

Was it stiff enough to keep the piece true? I have done something similar with a jam chuck with a partially hollowed center. I use a piece of 3M Scotchbrite pad for cushion, cutting a donut shape when needed. Sometimes I can get by without the donut.

Wood likely would have been better but it did ok.

 

[Kent Reisdorph]

I like the idea. I wonder if there are donuts out there, made for some other purpose entirely, that would be better suited to this. I googled a little, but didn't come up with much.

 

[Paul Paukstelis]

I like the idea. I wonder if there are donuts out there, made for some other purpose entirely, that would be better suited to this. I googled a little, but didn't come up with much.

I make these. They work great for both an interface ring on a vac chuck and a friction ring. No marking, no denting as I print them in flexible (TPU) filament: https://www.printables.com/model/1110441-vacuum-chuck-interface-rings

 

[Kent Reisdorph]

I make these. They work great for both an interface ring on a vac chuck and a friction ring. No marking, no denting as I print them in flexible (TPU) filament: https://www.printables.com/model/1110441-vacuum-chuck-interface-rings

Aha! I understand there is a softer PLA that might work good here. I have no experience with it, though.

 

[John K Jordan]

I like the idea. I wonder if there are donuts out there, made for some other purpose entirely, that would be better suited to this. I googled a little, but didn't come up with much.

Don't know how tough they are:

https://www.amazon.com/Melissa-Doug-Rainbow-Stacker-Educational/dp/B000067PWG

Rubber Chuckie sells a variety of tough, flexible rubber things, mandrels, etc. I've turned some to fit a particular project.

JKJ

 

[Alan Weinberg]

Rubber Chuckie

I use those but they are pyramid or cone shaped and not round . . .

 

[Jim Reynolds]

I believe that JKJ was referring to the PVC coupling rings / vacuum seals. Link

 

[Mark Hepburn]

I believe that JKJ was referring to the PVC coupling rings / vacuum seals. Link

I have some of the rubber chucky rings shown in the link. They're pretty stiff but still pliable.

 

[BobCoates]

Wonder if Jim's would work attached to the base of a donut chuck. Perhaps with a PVC end cap attached first.