Split Ring Compound Planet Epicyclic Gear

This was super great, I haven't seen this mechanism before and really like how compact it is for such a huge gearing ratio - also well explained. Thanks for sharing :)

Thankful for your help to a better world of designers and builders.

This video really helped me to figure all this out, thanks!

This is a great video. Further to your last point on this video, the two gear sets can't have the same module because the 12/60 and 15/60 gear pairs have to have the same pitch diameters (e.g. share axles). The calculation isn't difficult but it stretched me to derive it! Sum the tooth counts of the first sun and planet gears (12+60), multiply by their module, then divide by the sum of the tooth count of the second sun and planet gears (15+60), to give the module of the second gear set. The tooth counts of the ring gears is S+2*P (12+60+60 and 15+60+60).

Thank You so very much. Exactly the video I was looking for after being inspired from guys like "Gear Down For What", "Skyentific", "James Bruton", "Levi Janssen". Glad that i finally got here....Yay!!!

It's funny you mention telescope tracker. That is the exact project I wanted to build that lead me to this kind of gearbox.

David, Very Good, I have reproduced my self, and works perfect. Thank You

Big thanks for the clear explaination

Excellent explanation. Thank You.

This is how a winch gear is setup, but it has just one set of planet gears (same teeth, not different like yours) that spin on both rings, the top ring turning really slow. Monster torque from a small motor, but the gears are super loud.

Cool Gearset!

absolutely brilliant! Thank you !!!

thanks! this video helped me a lot!

Brilliant explanation, sir :-)

Love it! Great video, thx 👍🏻

Great video!

GREAT WORK

hi david excellent video! maybe have you kept working in the experimental 3d printable Nema 17 Stepper Motor?

Very good, Thank you!

Very cool design! Have you done backlash and max. payload tests on this?