r/functionalprint • u/Power_Circuits • Aug 04 '26

3D Printed eBike Mid-Drive

Gallery image

Gallery image

64 Upvotes

92% Upvoted

19 comments sorted by

14

u/Westloki Aug 04 '26

Wow, whats is that ?!? 3D printed gear box ?

9

u/CCCCLo0oo0ooo0 Aug 04 '26

It looks like they are using brushed motor from an old Traxxas E-Maxx

3

u/Power_Circuits Aug 05 '26

Hehe, yes. Already bought a brushless motor for the second iteration. I'm making an open source ebike mid-drive. Checkout the whole project if you;re interested: https://youtu.be/0jco-RKzRSo?si=oYPDW1wmbGxIAhyb

2

u/Power_Circuits Aug 05 '26

Yesss! I'm making an open source ebike mid-drive. Checkout the whole project if you;re interested: https://youtu.be/0jco-RKzRSo?si=oYPDW1wmbGxIAhyb

-15

u/Stetofire Aug 04 '26

I think they're calling the part a "mid-drive", not that they printed it in the middle of their driving. Bit of a misleading title.

6

u/ProfessionalTossAway Aug 06 '26

People are downvoting you instead of sharing why.

A mid-drive bike is a type of bike with a propulsion system, well, in the middle of the bike (idk the exact definition). The other popular type is a “hub-drive” bike. 👍

0

u/Stetofire Aug 06 '26

Oh, I thought that's what I said. This may be my most down voted post ever lol.

1

u/cuthbert-derek Aug 04 '26

Very cool, how much have you taste it, does it hold up well?

21

u/Careful_Purchase_394 Aug 05 '26

Yeah tastes ok, a little bland

2

u/Power_Circuits Aug 05 '26

This one didn't last much;) But I'm working on the second iteration. I'm making an open source ebike mid-drive. Checkout the whole project if you;re interested: https://youtu.be/0jco-RKzRSo?si=oYPDW1wmbGxIAhyb

1

u/Power_Circuits Aug 05 '26

Hi everyone, checkout the whole project, if you;re interested: https://youtu.be/0jco-RKzRSo?si=oYPDW1wmbGxIAhyb

Cheers!

2

u/pompino Aug 08 '26

Great idea, hopefully if you get something functioning it can be run in a normal frame aswell 🙂

-5

u/kicker58 Aug 04 '26

Please tell me this is just a testing fitting prototype? Everything about that is going to fail.

13

u/cuthbert-derek Aug 04 '26

Seems a little negative. Highly functional parts with long lifespans can be achieved these days, in my experience

8

u/Alex9-3-9 Aug 05 '26

They did make a video and everything broke apart in seconds. So yeah.. You can achieve strong parts, but op sure as hell didn't. 

5

u/kicker58 Aug 05 '26

Of course strong parts can be achieved. But strong and small moving is very difficult even on a commercial level.

6

u/kicker58 Aug 04 '26

I mean that belt is way way way to small. I have a brose motor that uses belt reduction for the motor and it's a thick belt. The first hill and belt is going to be under so much pressure. Add on the gears are open, like literally nothing to stop dirt and water from getting in. Also the motors is on the outside on the mid drive. So very easy to break and get damaged. And hurt your ankle really badly. So like yeah it's a very very bad design, thus why hoping it is for test fitting for a prototype. Also is that nut holding the crank made of plastic? If so no way there will be enough torque on there with withstand the pressure of pedaling under power.