Does anyone know of a reliable way to make a ratchet gear on 60T gears?
The normal way that I know to do it uses 84T gears.
In this thread, @Peter_Bison1 showed this, but a few of my friends and I have tried to get it to work, but we can’t figure it out.
https://vexforum.com/index.php/attachment/56b017b73f16e_Photo%20on%201-26-16%20at%204.59%20PM.jpg
Here is a vid of our method of making 60 tooth gear ratchets.
Thanks, unfortunately that won’t work for me because the pawl would run into an axle right beside it.
(It’s powering a 12T gear.)
It can be build with a 6 tooth sprocket and it all fits inside the 60 tooth gear. I will try and send a vid of it later.
I think that that will work nicely.
This is a more detailed explanation of the ratchet that our team used, in case you want to use it. The 60 tooth high strength gear has plastic free spinning inserts and when the central shaft is turned in one direction, the 12 tooth metal pinion spins each of the other two metal pinions and they clamp down on the two zip-ties, thus turing the 60 tooth high strength gear. When it is turned in the other direction, the central metal pinion spins the other pinions in the opposite direction and they push the zip-ties outward and it freely coasts. In the case of this one of the rackets, when the central shaft is turned clockwise the zip-ties get clamped down on and it spins regularly. When the central shaft is turned counter-clockwise the 60 tooth gear does not move. Here are a few extra photos of the racket.
I’m probably misunderstanding something, but when we tried that, the pinions couldn’t rotate at all. Do you have any video of it?
How long does this spin for when its up to speed. (Assuming its connected to a flywheel) It seems its a problem when the flywheel doesn’t drop in speed quickly enough to change the launching distance.
Of course if that’s a problem this design looks like it would still be excellent for other things. Lift deployment etc…
Here is a video of it working.
The coasting resistance can be changed by changing up the way that the zip-ties are bent. So I think you could play around with it and make so that any flywheel could drop speed quick enough. It would also probably be good for other things as well.
There’s still something that I don’t understand.
How do the two outside pinion gears rotate if the center one is locked by the bearing?
The metal insert in the center of the bearing is removed as seen in these pictures.
Oh. 
That was the part that I was missing from the beginning.
I looks like it’s there in the original picture.
Out of curiosity, Could this be done with 36T gears?
Yes this is a picture of a 36 tooth high strength gear with a ratchet on it.
what about a 12 tooth gear?
36 tooth gear, I’ve done it…
But 12 tooth gear, I’d like to see someone try. It would probably require you to custom cut the hub and then put notches or something. kinda like inside the metal gear.
I also don’t know why you’d need a 12 t ratchet but…
Our team has not needed a 12 tooth ratchet, but even if we did I doubt we could make one.
I’ve actually made a modification to this ratchet, and I like how it works so well. I instead of using zipties added a cut off pillow bearing and a rubber link, and it seems to be a bit more reliable and easier to tune.
Any pictures?
I’ll take some today.
Here are the photos of the modification I made.