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+-- Thread: What I've found out about vacuum chucking (/showthread.php?tid=7348135)
What I've found out about vacuum chucking - hairy - 05-09-2019
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-Bearings-Ball-Pre-Lubricated/dp/B01CUNOWWG/ref=sr_1_33?keywords=woodturning+vacuum&qid=1557425031&s=gateway&sr=8-33
This is the foam.
https://www.amazon.com/gp/product/B07FPF26VW/ref=ppx_od_dt_b_asin_title_s00?ie=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.
RE: What I've found out about vacuum chucking - FrankAtl - 05-09-2019
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/102/5387/Hold-Fast-6-Inch-Vacuum-Chuck-System
RE: What I've found out about vacuum chucking - Woodshop - 05-11-2019
(05-09-2019, 05:58 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/102/5387/Hold-Fast-6-Inch-Vacuum-Chuck-System
same here, Holdfast works great with my air compressor
Got mine from Hartvill tool, with woodnet discount and free shipping
RE: What I've found out about vacuum chucking - hairy - 05-11-2019
(05-11-2019, 09:27 AM)Woodshop Wrote: same here, Holdfast works great with my air compressor
Thanks fellas! I'm not going to use a venturi system, or shop vac.
I love that Hartville discount
Anyone using hot glue, or construction adhesive, silicon caulk?
RE: What I've found out about vacuum chucking - Wipedout - 05-11-2019
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/_Fits_OneWay%E2%84%A2_Vacuum_Drums.html
If I was making my own chucks I'd make them to fit rubber chuckys
RE: What I've found out about vacuum chucking - hairy - 05-12-2019
(05-11-2019, 07:52 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/_Fits_OneWay%E2%84%A2_Vacuum_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.
RE: What I've found out about vacuum chucking - Wipedout - 05-12-2019
Yeah I kept chewing up foam seals and since getting these I haven't had to replace them yet
RE: What I've found out about vacuum chucking - EightFingers - 05-12-2019
I want to sell my gast system, but the shipping would be expensive!