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I electrified my push scooter with a power drill

eddieabbondanz.io

170 points by speckx · 56 comments

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20 threads
robgough

My first thought after reading this title: Oh cool, they've taken part in a drill and used the motor. I don't really know what that looks like inside a power drill. This will be an interesting post.

Immediately opened it and laughed out loud. Perfect execution, no notes.

  • Aurornis

    Same thought here. Did not expect this level of jank but I loved every photo and word.

    The contrast between the 3D scanning and bolting a power drill to the side was fun.

  • shermantanktop

    Not enough gaffer/duct tape! But the inability to bank to the right side is perfect. Just do a 270 to the left.

  • bombcar

    This is exactly what I wanted even though it was not at all what I expected.

  • madaxe_again

    You’d love how I’m starting my generator. Same drill. Hodgepodge of springs and string to manage the choke. ESP32 committing obscenities in the middle of all of it.

    • dotancohen

      What is that one-way bearing TFA mentions. I understand its purpose, but where does one acquire such a bearing?

      • aidenn0

        TFA has a link to the amazon page for the bearing used. It's a bearing plus freewheel clutch. Most commonly (and in this specific case) it means sprag clutch[1], but it may be e.g. a ratchet/pawl[2] (like most bikes have) or a roller freewheel[3].

        1: https://en.wikipedia.org/wiki/Sprag_clutch

        2: https://en.wikipedia.org/wiki/Ratchet_(device)

        3: Couldn't find a wikipedia page for this, so https://www.youtube.com/watch?v=AU4OguQmyMM

      • ssl-3

        If I understand the question correctly then you're asking about a sprag clutch.

        When used in-line on a shaft like this, a sprag clutch permits torque to be transmitted out of the drill motor but not into the drill motor.

        Any operation as a support bearing for the spinny-bits is kind of a secondary function at very best (and may be ill-advised; a sprag clutch assembly may be shaped kind of like a roller bearing assembly, but that doesn't mean that it will live long in that kind of role). :)

        • dotancohen

          Thank you.

          Would it need a standard bearing on only one side of the sprag clutch, or should I double them up on both sides?

      • ano-ther

        Had the same question. The article has an Amazon link to the bearings.

    • Gee101

      This absolutely deserves to be documented

kleiba2

That's all nice and well -- but Matthias Wandel built a wooden scaffolding on wheels 12 years ago that was drill powered. That's _really_ crazy...

https://www.youtube.com/watch?v=rBmnQN78aZU

burnt_toast

Hey all, author here. I had no idea this hit hackernews until my website traffic spiked. Happy to answer any questions. The scooter is still holding strong.

willy_k

Wonder how this would work with an impact? Also, since it already uses one-way bearings, could another drill/impact be fitted to the other side so that there are two “gears” available?

  • userbinator

    Wonder how this would work with an impact?

    Not very well. It will work as long as the power demand is below the point it starts hitting, and then just stall with the tires absorbing all the impact hits once it reaches that point.

  • to11mtm

    Pssssh that seems boring.

    The real deal would be putting another drill on the back wheel, so that you have All-Wheel-Drive!

  • dotancohen

    Squel the tires every few meters? Like an AC Cobra.

Doohickey-d

I do wonder how long the electronics, motor and little (plastic) gears in the drill would last with this. Especially since I'd suspect that it's designed for intermittent use, where it has time to cool down between each screw / hole drilling that you'd do normally. If you drive 2 miles in one go, that'll be a lot of heat that doesn't have time go anywhere.

Somehow I'd suspect that it won't last all that long...

  • userbinator

    I suspect there's very little power needed once you're up to speed and cruising, but constant stop-and-go and long uphill runs will certainly cause it to overheat.

    It's brushless so brush wear isn't a problem, but these motors are air-cooled and will actually be cooler at high speed, low-demand. Lugging it up a hill would be a worst case.

  • michaelt

    I used a lower price electric drill to polish some stainless steel, and after a single hour of continuous operation it was never the same again.

  • lisp2240

    Drills are used sporadically. If a drill was used intermittently it would be on most of the time and occasionally off.

    • toast0

      > If a drill was used intermittently it would be on most of the time and occasionally off.

      But when the wipers in my car are set to intermittent, they are off most of time and ocassionally off.

    • Daneel_

      I’m fairly sure ‘sporadic’ indicates random/unpredictable timing while ‘intermittent’ has a predictable pattern.

      • ssl-3

        I get sporadic phone calls about intermittent issues with some system or other that I take care of out there in the world.

        (I wish there were a pattern to any of it, since it's often very difficult to fix things that are usually working fine.)

sandeepkd

Feels good to see some one is enjoying and having fun with the tech

kphorn

We are in the days of building the things we dreamed about as kids. Looks great for right turns!

buildsjets

OK, but here's a Lada in Russia powered by fifty cordless power drills.

https://www.youtube.com/watch?v=sv8Q4bDl6lo

jeffreygoesto

Where have I seen something like this before. Right HAWK Hildesheim organized (locally) famous "Akkuschrauberrennen" https://m.youtube.com/results?sp=mAEA&search_query=akkuschra...

ielillo

Reminds me of the red green show sans duct tape

walthamstow

Love it. This is almost exactly how I electrified my crank-driven standing desk

delichon

What is that 3D printed wheel made of that it can support over half of your weight while bumping along a road?

echelon_musk

A good friend of mine told me he would frequently come across a guy who had modified his bicycle with an electric drill.

He would see him leaning over and pulling the trigger get an electric assist on the uphill section of the commute.

_joel

Direct drive, yes, also direct drill.

Watch out for the gear change, may end up in hammer action.

MezzoDelCammin

and as a bonus, now you know how it feels to ride a BMW boxer motorbike in a turn ;-)

bzmrgonz

You know you could have used a 90 degree chuck buddy. Or better yet, an angle grinder to make it a friction drive from above.

  • jacquesm

    It's got 2 miles of range, adding those complications would likely eat up a lot of the range.

  • convolvatron

    angle grinders run really fast, and even those with speed control just lower total power, not increase torque.

    it would have made more sense to just mount the motor and the planetary, but I think the planetary is important here.

gniv

Turning right seems hard.

  • dotancohen

    Is that why all politicians are suddenly turning to the left?

    • BLKNSLVR

      If that's what you're seeing then my guess is that, like this scooter, they'll be turning left three times so they end up going right.

      I'm not sure where you are if you're seeing politicians turning left though.

nchmy

video or it didnt happen!

tamimio

Missed the opportunity to add vacuums and blowers and go upside down plus lateral and rotational movement, with fancy dark themed site and buzz words all over :)

erelong

add another wheel on the other side of the drill for a kind of sidecar-like stability? (tricycle style?)

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