193 Vacuum Chuck with Replaceable Fixture Plate Part 4 - Final

Please Note: I am a beginning machinist and I do not pretend to know everything. Please always operate machinery in a safe manner and if you don't know, find a reliable source. DO NOT COPY ME. I make a lot of mistakes. I provide these videos for entertainment only.

[davidsnyder]

I never really took much time to think about making a vacuum fixture plate. Didn’t realize how precise everything must be for it to work really good. That was really interesting…thank you👍🙂

[craigtate]

coolest build I have seen in a long time!

[MattysWorkshop]

Gday, I think you’ll get this sort in job time, trial wand error is the best way to go, thanks for sharing, cheers

[JustGuyMetalworks]

A little thread sealer goes a long way. Interesting project, Rob! Thanks for sharing! 😁
Cheers!

[hilltopmachineworks]

Interesting project. I wonder if you could have used a 1 inch annular cutter and just plunged cut to cut the O ring groves and saved you from having to mill all of them on the rotary table?

[swanvalleymachineshop]

Hey Rob, have a look at the yellow silicone O rings .

[clyded.]

Hi, very great work! There are O-ring calculators available online using tube I.D, O.D., and gland depth as well as the O-ring's cross section, and I.D. If you have the specifications for the O-ring from your supplier, you would be able to design the O-ring gland to match your need from the calculated stretch, squeeze, and gland fill.

[be]

i think the nylon bolts are not seating very well, to stif, maybe a thin o-ring between the nylon bolts en the seating makes the leaking stop ?
thanks for the vid, we all learn together this way.
cheers ben.

[honeycuttracing]

On your leaking plugs, how about also add a small tank to hold more volume of vacuum....just our thoughts!

[CDSolutions]

Maybe drill and tap 1/16" NPT all your 1/4-20 holes. You can then put brass socket pipe plugs instead of setscrews. Maybe 1/8" NPT on your base plate.

[tiagolomar]

Best way to seal is to use regular screws with one o’ring…. Try to use counter sink screw with o’ring….

[trollforge]

I wish I could offer something to help, but my vacuum knowledge sucks... ;)
Actually, if you change out the nylon screws for steel, with washers cut from an inner tube, that might be beneficial.

[iTeerRex]

Man how nice a CnC milling machine would’ve been for this project. What do you think of motorizing the X and Y of the milling machine?

[melgross]

That is an awful amount of work. I like that tapping unit. Do you mind telling the model and manufacturer? You might want to look at the sealing socket head screws in the McMastercarr catalog. The start a 0-80 and go up from there. The have a groove under the head with a buna o-ring fitted. They seal very well. Since you countersunk the holes already, you might want to try these and upgrade those countersinks to actual counterbores.

[jpsimon]

I've always wondered why the drill bit companies can't cooperate with the fastener companies enough to make a step drill that would drill the tap hole and the countersink in one go. I have a handful of tools that do exactly this, they are from the 30s and 40s and we're just called step drills at the time. They only had one step apiece and had advertising suggesting that you use only the finest fasteners such as a, b, and c. Such a simple thing, and the socket head cap screw has become so ubiquitous, I don't understand why these are not widely available. If nothing else, if letter and number test drills had a small counter sink at the top, it would save a tool change before you thread, it always goes so much smoother if you countersink it first. Why? I'm just a moron in a recliner. If I can think that up, why can the drill bit companies not? Perhaps they own the fastener companies and make more money this way, that's much more in line with capitalism

[MP-vdpf]

you are cutting your slot too deep and using the wrong o ring, only go .095 to .100 deep, you need to order Ethylene Propylene for vacuum seals or order the material from Pierson it's a softer material that will form with that slot.we run all brands of vacuum chuck at my company and the slot and gasket matters. you're almost there. John

[calholli]

Just teflon tape your screws..
edit: Oh, I guess you did. lol

[jpsimon]

I'm not remotely critical of your choice, clearly it gets plenty of use. I'm curious if you weighed a procurier tapping head or two on an older heavy rigid drill press against this setup? It's clearly a wonderful tool, I presume there's a significant price difference, what does it do especially better?