Wood Gear Planetary Drive

Hand cut wood gear planetary drive. There are three separate planetary drives stacked on top of each other consisting of seventeen gears total. Input motor speed is 80 RPM driving the input ring gear of the first planetary 20 RPM. First planetary output speed 14.28 RPM. Second planetary output speed 10.2 RPM. Third (final) planetary output speed 7.29 RPM. Planetary drives can be operated in several different ways. Driving the ring gear, driving the planets or driving the sun gear, each while freezing one of the other groups resulting in speed reduction, directional reverse or increased speed.

The main purpose of this planetary was to see if I could make it with hand cut gears and how smoothly it would operate. Eventually it will be used to drive a marble machine. Secondly, it was constructed as a visual aid of a planetary drive system.

The wood gears themselves are fairly quiet. It is the induction motor gearbox that is loading up and making most of the noise you hear in this video.

Category:

Howto & Style

Tags:

• Wood
• Gears
• Planetary
• Reduction
• Transmission
• Marble
• Machine
• Drive
• How
• To
• Make
• Woodworking

[RonaldWalters47]

Search for Scroll Saw File. Olson sells 2-packs. Fairly expensive. It’s a strip of metal with epoxy bonded abrasive both sides and edges. Don’t force it-slow & easy-let the abrasive do the work or it gets hot and the epoxy will let go. They also have a fatigue life like a scroll saw blade. Some people make a holder for a jewelers file but I’m sure they will get dull in one spot pretty quick. Or you can do it the old fashioned way with sandpaper or a hand file. They all take time and patience.

[RonaldWalters47]

The gears are ½ inch Baltic Birch Plywood made in Russia, has many plies, very few (if any) internal voids, very flat and comes in 5 ft x 5 ft sheets. Good stuff to work with but not cheap and not always easy to find. Available in several thicknesses but personally I have only obtained 1/8”, 1/4”, 1/2” and 3/4” sheets.

Construction article at the following link give more information:

woodgears.ca/reader/walters/in­dex.html

Thanks for the questions… Please subscribe to my channel.

[RonaldWalters47]

Planetary gears are found in automatic transmissions, gear reductions, cordless screwdrivers, final drives such as the drive hubs on a Humvee (military vehicle) and many other places. They provide a very compact and powerful speed reduction or reversing mechanism compared to using individual gears in series.

Check out the use of ring gears in my Marble Machine video.

Thank you for your question. Please subscribe to my channel.

[RonaldWalters47]

This mechanism would be quite unforgiving. It would first "crush" and then "remove" an errant finger. That's why I have the plexiglas guard riding on the face of the gear drive to keep fingers out.

[RonaldWalters47]

Each layer is a gear reduction.

Motor speed 80 RPM driving the input ring of the first planetary 20 RPM.

First planetary (bottom) output speed 14.28 RPM

Second planetary output speed 10.2 RPM

Third (top) planetary output speed 7.29 RPM

The pieces of blue tape are there to make the difference in speed more noticeable.

Go to woodgears.ca and click on Reader Projects to see a construction article, description and photographs of this mechanism.

Thank you for subscribing to my Channel.

[RonaldWalters47]

Found the numbers:

External ring gear 52 teeth – motor drive gear 13 teeth

Planetary ring gear 42 teeth, sun 18 teeth, planets 12 teeth

[BossWolfen]

I clicked this video just to say... GEARCEPTION!!

[Bryanx89]

only dislikes are from people who were mind fucked

[anikidwolfy]

warp speed mr sulu

[viatus]

Cool Beans >D

[sibritstone]

Is it a wooden motor?

[TheJudger94]

you need a quieter moter then put it on display in your home

[djohnson16mindspring]

Mesmerizing...

[phophollety]

Do not forget to add grease!

[iZiiicK]

How do i came from watching quick scope videos to this ?!