windsurfer

My Feedback: (37)

Hello people,

I have been looking for a ultra small plastic gearbox with a reduction ratio of 100:1 (or bigger) that matches brushed motors with 4mm or smaller diameter.
Plantraco sells it but that is still too small of a ratio for me.
Please see: http://www.microflight.com/Online-Ca...box-with-motor
Please let me know if you are aware of any.
Many thanks.

coriolan

For such a ratio you will have to make one yourself, which is not as hard as it sound. but to achieve that ratio it will have to be 2 or 3 stages. A good source of small high quality gears is Didel in Switzerland:
http://www.didel.com/News.html
There is also Homefly which is US based:
http://www.homefly.com/
with that size of gears precision become very important to minimize losses but it can be done

airraptor

My Feedback: (66)

why not use a micro servo. modify it so that will spin all the way around. i bet could find one in the correct ratio.

cyhohk

Hello ,

Are you going to use brushless motor with 3A ESC? If interest I can give you some photo and contact.

CY

micro_builder

My Feedback: (1)

You may have a hard time finding something with that high of ratio, especially with a 4mm motor. This is about as high as I've seen, but its for 6mm motors here. Otherwise, as coriolan and airraptor mentioned, a mutli-stage gearbox would be in order.

What are you using it for?

Nick

If going with coriolans idea of using a servo, all you would have to do to make it run constantly like a normal gearbox, would be take out the control board, and go directly to the motor wires. Pretty easy, but should work.