Recommendations for *quiet* vibratory tumblers? - Page 2
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  1. #21
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    Quote Originally Posted by Nerdlinger View Post
    I know centrifugal disk finishing machines are super fast (and probably expensive) but they might be quieter than “tumblers” since I think they’re just spinning instead of shaking. Maybe you can find a small used one.
    We also use high energy deburring for small parts. It's like a 3 min cycle to deburr....pretty nuts

    Sent from my Pixel 3 using Tapatalk

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  3. #22
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    We used to have a Sweco machine, probably just under 3' across. Reasonably quiet, at least quieter than the rest of the shop. The high energy units might make more noise, but they'll be done in a jiffy. Start here- Harperizer, Precision Finishing | Barre, MA

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    Quote Originally Posted by garyhlucas View Post
    The problem with your sound enclosure is the sides work like a speaker cone. The inside surface needs to be disconnected from the outside surface and filled with insulation.
    The enclosure worked *really* well in the last 2 workshop buildings I was in... It still works well, there is no high frequency noise at all, but there is something weird with the slab in this building and it transmits the vibration a very long distance...

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    Quote Originally Posted by as9100d View Post
    We have several of these and they are almost silent and not messy.... These are what you need and they are very low cost.

    Vibratory Finisher - Royson Engineering Co.

    Sent from my Pixel 3 using Tapatalk
    Those look great! Thanks for the link! They look like they are a bit less expensive than the Burr Bench units, and potentially better sound-proofed!

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  7. #25
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    Could you cut an expansion joint in the slab a bit away from it then fill with a sealant, or would that mess up the building in an unacceptable way?

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  9. #26
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    Mine sit on tall rubber feet 4-6 inches and very spongy. Push on the not running vibe and it moves inches.
    These on top of good size I beams which sit on a wood 4x4/plywood platform.
    This with thin vibration pads under it. Keeps it out of the floor where my grinders care.
    Noise up top is higher frequency so angled and dead walls. The wall itself can become a sounding board or transmit into the floor.
    Running them since 1973, took a lot of playing around to come up with workable.
    Bob

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  11. #27
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    Quote Originally Posted by garyhlucas View Post
    I visited an old Nike missle command bunker. Every piece of machinery in the bunker was mounted to a 1 foot thick block of cement sitting on springs. I suspect that would work here.
    LOL! Yah. Really. "Crew". Not "visitor". Battery A-3-51. Then Atlantic Highlands, "Missile Master", 19th Group. Converted from an old "Coast-Artillery" fortress. And why not? Nike was more than "just" Anti-Aircraft. Serious ship or submarine-killer, too! Or a city. South Koreans and Turks LOVED theirs!

    You'll have to guess how thick the REST of the bunker was?

    If yah need THAT? Seriously?

    Simple.

    As with thermonuclear war?

    "The only winning move is not to play."

    Go for "exile" of it!

    "Quiet" vib gear is any that has been farmed-out to some DEAF f**ker a mile and a half down the road! Then run "lights out".


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    Quote Originally Posted by thermite View Post
    LOL! Yah. Really. "Crew". Not "visitor". Battery A-3-51. Then Atlantic Highlands, "Missile Master", 19th Group. Converted from an old "Coast-Artillery" fortress. And why not? Nike was more than "just" Anti-Aircraft. Serious ship or submarine-killer, too! Or a city. South Koreans and Turks LOVED theirs!

    You'll have to guess how thick the REST of the bunker was?

    If yah need THAT? Seriously?

    Simple.

    As with thermonuclear war?

    "The only winning move is not to play."

    Go for "exile" of it!

    "Quiet" vib gear is any that has been farmed-out to some DEAF f**ker a mile and a half down the road! Then run "lights out".

    Yup, same in the Ma bell "Long lines" local switching center.
    spooky underground unit with qty (4) 8v-92 deetroit gensets.

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    Quote Originally Posted by digger doug View Post
    Yup, same in the Ma bell "Long lines" local switching center.
    spooky underground unit with qty (4) 8v-92 deetroit gensets.
    Ma Bell had a key role in NORAD ,"back in the day".

    Concealed what was being built and where by keeping stuff - such as 9,000 miles of deep-buried T2 data link costs - spread-out on America's phone bills instead of Federal taxes.

    No damned WONDER all the "new entrants" sold cheaper long-distance!

    European "PTT's" were all Government-owned, so it wasn't a big a deal.

    Shut down my HKG racks.. no longer a safe place after the handover. Kept my other email running off the servers in a Swiss government bunker as rents rackspace.

    One of two I've utilized. Been inside a helluva lot more...

    Si vis pacem, para bellum

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    Quote Originally Posted by thermite View Post
    Ma Bell had a key role in NORAD ,"back in the day".

    Concealed what was being built and where by keeping stuff - such as 9,000 miles of deep-buried T2 data link costs - spread-out on America's phone bills instead of Federal taxes.

    No damned WONDER all the "new entrants" sold cheaper long-distance!

    European "PTT's" were all Government-owned, so it wasn't a big a deal.

    Shut down my HKG racks.. no longer a safe place after the handover. Kept my other email running off the servers in a Swiss government bunker as rents rackspace.

    One of two I've utilized. Been inside a helluva lot more...

    Si vis pacem, para bellum
    yup, the new owner removed the wall map of the locations across the country of these things, is now in his office.

    Spooky-er still was the big swinging safe like door at the bottom of the steps to enter. Sign over top (on the inside) "Keep door closed during nuclear fallout"

    Not "if".....

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    Look at Peabody Noise Control spring-isolated feet. They'll keep it from walking away, but isolate well when loaded correctly. (Correct loading is key to all isolation solutions.) Ballast may still be needed.
    Restrained Spring Vibration Isolator | Model FLS for Cooling Towers, Chillers and Condensers

    I think your slab is acting as a diaphragm because it's somewhat thin, possibly poorly-supported, etc. Damping that is too big/expensive a job, so killing the impact noise at its source is best approach.

    Also, your box needs more mass, and air-tight seals. Looks like a chest freezer shell, filled with sand instead of insulation, would be a cheap testbed.

    Suspending from ceiling may turn the roof into another vibrating membrane, but it's worth a try. Again, Peabody ceiling hangers would be worth looking at.
    Spring and Fiberglass Isolation Hanger | Model SFH for Ductwork, Piping, Suspended Fans and Pumps
    Spring and Vibration Isolation Hanger | Model SH for Piping, Ductwork and Suspended Equipment

    They also make a inertia frame 'kit' (just add concrete, apparently) that could work -- for a couple of units.
    Inertia Base Frames | CIB

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  17. #32
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    My Sweco (3 cu ft bowl) sits on a piece of 2" styrofoam (extruded). Hasn't walked, in spite of the boss, for 20 years.

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    Quote Originally Posted by as9100d View Post
    Here ya go.



    Sent from my Pixel 3 using Tapatalk
    That would have been a lot better deal than buying the C&M, putting up with them for 20+ years, then having to "fix" them. however having 4 on hand I fixed 2 and will sell one of the remaining, I am keeping one for parts.
    Thanks, good find.

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    Hi. You can reduce noise level to 75dB with a sound cover.
    If you want to achieve the same surface finishing with low noise, a rotary barrel tumbler would be a good choice for you
    You can find more information from Inovatec Machinery. www.inovatecmachinery.com

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    垃圾邮件 垃圾郵件 垃圾郵件

  21. #36
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    Oh that guy is going to drive me nuts!

    Regurgitating old threads to sell his Chinky chunk.

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    How would barrel tumbling compare to vibratory finishing?

    Tom

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    Quote Originally Posted by TDegenhart View Post
    How would barrel tumbling compare to vibratory finishing?

    Tom
    The guys at C&M Topline told me not to bother with rotary tumbling. That was originally what I was thinking about as well but they said for my parts (made from fully hard tool steel) the cycle time would be on the order of several days to achieve the same results that I get now in a couple of hours in my vibratory tumbler.

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    Quote Originally Posted by ChipSplitter View Post
    Oh that guy is going to drive me nuts!

    Regurgitating old threads to sell his Chinky chunk.
    Not really cool man.

    -- A guy with squinty eyes.

    (And no, I'm not offended, but seriously, it's 2020, let's at least TRY not to be racist?)

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  26. #40
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    Quote Originally Posted by TeachMePlease View Post
    Not really cool man.

    -- A guy with squinty eyes.

    (And no, I'm not offended, but seriously, it's 2020, let's at least TRY not to be racist?)
    Sorry.
    Guess I went over da edge.
    I just can't believe he has dredged up so many old threads and not been banned yet....

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