60,000 RPM vacuum powered rotary tool was 3D printed

vacuum-powered-rotary-tool

The whining of the turbines in the 3D printed pneumatic rotary tool might make your teeth hurt. When [Axodus] tipped us off about it he mentioned it sounded like a 747 taking off. But we hear a dentist’s drill when watching the demo video.

[Richard Macfarlane] published his design if you want to try building one for yourself. But you will need to do some machining in addition to printing the enclosure and the pair of turbines. The shaft of the tool needs to fit the bearings precisely. It accepts a center blue spacer with a red turbine on either side. This assembly is encapsulated in the two-part threaded blue body which has a flange to friction fit with the shop vacuum hose. The business end of the machined shaft was designed and threaded to accept the collet from a Dremel or similar rotary tool.

We wonder how much work it would be to re-engineer this to act as a PCB drill press?

 

Comments

  1. Jordan says:

    now make a 2in high torque version :D

  2. While this is pretty neat, I can’t imagine dust, metal shavings, etc. are going to be good for the blades long term. ‘Course, you could just print up new ones.

  3. squeeks says:

    I’ll need to calibrate my printer a bit more before I’d want to try spinning parts at those speeds.

    • Greenaum says:

      Worst happens, it explodes, the bits fly up the hoover. If a bit snaps off that goes up the hoover too and probably it stops spinning til you make a new one. Use PLA and it’ll fuse into your flesh harmlessly.

  4. Rodrigo Reis says:

    Brilliant

  5. heatgap says:

    That is amazing! Great idea. The first thing I thought is…and it will suck up the ground/cut up debris! So cool.

  6. Justin Shipe says:

    Proof of concept for printing EDF units for RC? Hmm…

  7. Eirinn says:

    Add a 3d printed herringbone gear planetary bearing! :P
    http://www.thingiverse.com/thing:53451

  8. Tyler says:

    Utterly terrifying…hope the external enclosure would be capable of containing a shred…surprised it was that balanced, but I suppose 3d printing could help with that

    • satovey says:

      That would be a definite problem if this were a typical pneumatic device which operates on air pressure being pushed toward the turbine and out the air vents. Because this device is operated on vacuum rather than air pressure, it is likely that should the turbine shatter, the vacuum will suck up the broken pieces.

  9. Joe T says:

  10. dmcbeing says:

    I was hopping for a vaccum operating at 60000 RMP :(
    This is slightly less impressive but way more usefull :P

  11. eatith mee says:

    Probably one of the most clever, coolest and most useful builds I’ve seen on HAD yet.

  12. Ijon_Tichi says:

    hm, it doesnt seem quite safe to actually suck glowing metal sparks into the dustbag…
    iven if they will be 99%ly cooled when they arive down there…
    but hey, its cool anyway :)

    • belenos46 says:

      Are you telling me you don’t want to apply fire to a bag full of tinder? Your opinion seems against the HaD spirit!

    • Addidis says:

      I was wondering when someone would notice. :D

      • Greenaum says:

        Either some sort of Halon fire-suppression system needs fixing in there, or he could just put fires out when and if they happen.

        Actually I wonder if some sort of water-trap would affect the pressure much? Like you’d use in, uh, a bong, or brewing or somesuch. Have a part-full jar of water spliced into the hose, with the sucker hose at the top and the working-end hose bubbling through. You know what I mean?

        Probably more trouble than it’s worth, unless sparks became a regular problem, then it might be a good idea.

        I wonder if they make them already for people who have to vacuum up a lot of fire?

  13. Kevin says:

    This would be great got a CNC router head.

    • Eternalgif says:

      CNC routers usually have insane torque to cut sideways through harder materials, right?

      • pcf11 says:

        I don’t have a CNC router yet but I have plenty of the hand operated kinds. They have some torque but I would say that routers rely more on high RPM than torque to do their work. I wouldn’t run a router on much more than wood as far as hard materials go either. If I need to cut harder materials, metal say, then I use my milling machine. It operates at lower RPM than routers do, and has a larger motor too. All of that translates into high, or perhaps even insane torque. As an example one of the tools I use on my mill is called a 2″ shell cutter, it resembles a large end mill. I run it at 220 RPM to cut through steel. That is still 115 surface feet per minute peripheral cutter speed, but some high spindle torque to make chips with such a large tool.

  14. Indeed this is awesome in many ways! (by the way it’s been on thingiverse for a while and when I first saw this I also said it’s genious ;) ).
    1. it’s the cheapest dremel you can find!
    2. It’s indeed perfect for a cnc router-> normally you’d add an extra tube connected to a vacuum next to your spindle to suck away debree. Now you get a lightweight high rpm spindle and vacuum in one go.
    3. Yes it’s just one of the really practical things to do with a 3d printer. I’m not gonna make advertising here but their going down in price (my own 3d printer webshop sells em for 500 euro).

  15. @joe T: Rofl yeah kinda like wayne’s world’s suck and cut but that really … sucked. This tool is awesome ;).

  16. Tweeks says:

    Awesome! Nice job!!!

  17. wardy says:

    That is absolutely brilliant. Wear and tear doesn’t matter because you can just print a new one when it gets a bit worn out (using the old one to de-burr the new one!!). 60,000 rpm is bound to put some considerable tensile strain on the plastic blades themselves – I’d be interested in knowing how consistently a 3D printer delivers it’s molten plastic. Is one turbine as good as the next or do you have to print out 10 before you find a usable one?

    Very impressive and elegantly simple design. That is great engineering.

  18. wretch says:

    Awesome!

    I, too, see this could be a perfect fit for a CNC head, but I wonder how the dust/debris being sucked into the vacuum and striking the rotary blades along the way would affect it, if at all. Isn’t it like stuff being sucked into a jet engine? Small stuff is OK, but a whole duck could be catastrophic.

  19. Brock_Lee says:

    So…..where’s the Kickstarter? This would seriously do very well.

  20. Error_user_unknown says:

    humm … 3D printed jet engine ?? yes it wouldn’t run for long but it would give you major street creed and the inevitable fire ball would make for a great vid.

  21. hboy007 says:

    Oh my gosh, this is soo good! I keep on thinking “why haven’t I thought of that before. Lovely idea!

  22. Haku says:

    I have to agree with everyone that it’s a superb idea, but I can’t help thinking it’s going to use an extraordinary amount of electricity compared to conventional rotary tools.

  23. Chris C. says:

    During the parts when it spins up and down, you can clearly hear the aliasing from it exceeding the Nyquist frequency of whatever recorded the audio. Must be producing an impressive spl at ultrasonic frequencies.

    • Robert says:

      I noticed this to but I believe that it is intermodulation between the turbine stator points and the vacuum supplies impeller. Quite impressive that this intermodulation can work through that length of tube. Obviously the resonant frequencies of the tube are providing some amplification.

  24. openmakersdaily says:

    I believe the blades are equilibrated after they are printed.

  25. big len says:

    A typical dremel tool is 175W, a vacuum cleaner is most likely ten times that – Am I missing something ? Presumably the torque provided is also woeful when comparing to a pneumatic tool that works from a positive pressure feed i.e. 0.5bar (certainly less than one) pressure difference versus 6-10 bar pressure difference typically ?

    An interesting indulgence in novelty and design none the less …

    • Greenaum says:

      Still, if you needed a tiny Dremel for free, for just a couple of jobs. I suppose people with 3D printers don’t need to do a lot of milling generally.

  26. markey1979 says:

    Like others, I love it!!! If there were a mounting bracket on the body, then it would be perfect for a little CNC router…..

  27. Keegan says:

    Does anyone know if this could be reversed to make a turbomolecular vacuum pump? I’ve always wanted one of those, but they’re so expensive. Just seeing this thing spin up to 60,000 RPM makes me think a 3D printed turbo pump might just be possible. Perhaps it could be powered by a Dremel?

    • This guy says:

      Maybe, if you really wanted to it could be adapted. But a TMP of this size is not going to do much at that kind of RPM. (A commercial unit of this size would probably run close to or even more than 500k rpm!)

      Also, because a TMP impeller of any decent size is quite a bit of material spinning at ludicrous speeds, they are DANGEROUS. I’ve seen the result of a medium size TMP impeller going kablewey. The results aren’t pretty. The impeller itself weighs no more than maybe 1/20th of the casing and drive unit, yet it managed to tear the casing almost clean off its mounting bolts (12x M10 bolts!).

      While I can understand the feeling of wanting a TMP to play with (So do I) I really don’t think it’s a safe thing to do at home if you don’t have access to a metal working shop and a big dose of experience handling ultra high speed equipment.

  28. Oren Beck says:

    Air bearings are often implemented in materials that appear to defy common sense principles. Designs using foil brush centered/flow managed bearings such as the Capstone Gennys come to mind as an example. This is a VERY worthy Hack for it’s proof-of-concept alone.

    Lest we forget one RP programs founding ethos of machines that can REPRODUCE?

    Additive Fabrication is a world changer. Using it to make Subtractive Fabrication machines is an evolving in progress scene. And there’s the aspects of no EMI/RFI nor needfully any metallic content as such. Ram Air Gyro? Geared as position motors for RF gear?
    This could be the core motor of damned many Hacks.

  29. Nardella says:

    Could this be adapted to power a RC plane?

  30. ursussiara says:

    There are definitely a lot of cool aspects to this hack, I say Bravo!
    I do have a question though.

    It makes sense that that any pieces coming off the internals is taken care off by the Vac itself, but what about the cutting/grinding tools (bits) themselves? Anyone one know what the max RPM rating on dremel is? The steel bits are probably fine, but what about some of the composites? I wear a full face shield as it is with their little cut-off wheels. Might get kinda hairy if one of those grinder wheels fractured at that speed, ya?

    Ursus.

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