What I've found out about vacuum chucking
#9
  
And it's not all good. I found a pump on c/l 4 years ago, and now I'm getting around to doing something with it. It came off of a piece of X ray equipment, max vacuum is about 22 in Hg. I added the manifold, gauge, hoses and fittings. Not as good as an A/C pump, but should suffice.  Yeah, I know.

I have so far made 2 chucks and 2 adapters , and only 1 will pull a vacuum. I suspect the bearings. I thought these would work, maybe they will. 



https://www.amazon.com/R6-2RS-Sealed-Bea...ay&sr=8-33

This is the foam.

https://www.amazon.com/gp/product/B07FPF...UTF8&psc=1
 

The flat disc with the black foam is the only 1 that works. I turned it on, placed a 3 lb. coffee can on it, got the 22 in Hg, and could not pull it off. Not even close.

The deep chuck would only pull 2 in Hg at first, I wrapped it with painters tape and got it down to 6 in Hg. I took off the tape and painted it with TB3, still 6 in Hg. I can only partly blame the bearing here.

I have some corian epoxied together, will try it soon.I used 2 part epoxy to attach a bearing to either lamp rod or a brass fitting. I thought I had a pretty good seal. I'm going to try to come up with a way to pressure test with compressed air.

I gave up on making just an adapter, and ordered 1 from Robust. They have to modify it to fit. I got a 10 year old Sweet 16 that's still as sweet as the day I brought it home 10 years ago. I'm going to just make few chucks.

I'd like to hear your success stories, and your fails. I might try MDF as a chuck body.


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#10
  Re: What I've found out about vacuum chucking by hairy (And it's not all goo...)
I never had any luck making my own vacuum chucks. I built the vacuum pump from Joe Woodworker and tried to make several different chucks. I finally broke down and bought a Holdfast setup and never looked back. It works great!

https://www.woodturnerscatalog.com/p/102...uck-System
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#11
  Re: RE: What I've found out about vacuum chucking by FrankAtl (I never had any luck...)
(05-09-2019, 06:58 PM)FrankAtl Wrote: I never had any luck making my own vacuum chucks. I built the vacuum pump from Joe Woodworker and tried to make several different chucks. I finally broke down and bought a Holdfast setup and never looked back. It works great!

https://www.woodturnerscatalog.com/p/102...uck-System


same here, Holdfast works great with my air compressor Yes Got mine from Hartvill tool, with woodnet discount and free shipping
Life is what you make of it, change your thinking, change your life!
Don's woodshop
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#12
  Re: RE: What I've found out about vacuum chucking by Woodshop ([quote='FrankAtl' pi...)
(05-11-2019, 10:27 AM)Woodshop Wrote: same here, Holdfast works great with my air compressor Yes Got mine from Hartvill tool, with woodnet discount and free shipping

Thanks fellas!  I'm not going to use a venturi system, or shop vac.

I love that Hartville discount Yes

Anyone using hot glue, or construction adhesive, silicon caulk?
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#13
  Re: What I've found out about vacuum chucking by hairy (And it's not all goo...)
I bit the bullet years back and bought one way Chuck's work great but pricey. Gave up on foam. Use rubber Chucky ones

https://www.rubberchucky.com/store/p39/_...Drums.html

If I was making my own chucks I'd make them to fit rubber chuckys
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#14
  Re: RE: What I've found out about vacuum chucking by Wipedout (I bit the bullet yea...)
(05-11-2019, 08:52 PM)Wipedout Wrote: I bit the bullet years back and bought one way Chuck's work great but pricey.  Gave up in foam. Use rubber Chucky ones

https://www.rubberchucky.com/store/p39/_...Drums.html

If I was making my own chucks I'd make them to fit rubber chuckies

Thanks for the link. I never knew about rubber chucky.
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#15
  Re: What I've found out about vacuum chucking by hairy (And it's not all goo...)
Yeah I kept chewing up foam seals and since getting these I haven't had to replace them yet
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#16
  Re: What I've found out about vacuum chucking by hairy (And it's not all goo...)
I want to sell my gast system, but the shipping would be expensive!
VH07V  
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