timing pulley ratios 1

[swcadguy]

I feel dumb asking this but I am trying to find the how much a pulley will turn.

I start with a 10t driver pulley and via belt a 120t pulley. Attached to this 120t pulley is another 10t pulley. With another belt goes from the 10t to another driven 120t.

I am crazy or are we back where we started?

My goal is with say 1 rev. of 10t driver I will get a small fraction rev at the final driven 120t.

Any help would be most helpfull.

 

[MikeHalloran]

The second driven shaft should rotate:

10 10 100 1
--- X --- = = --- , x 360 = 2.5 degrees
120 120 14400 144

per rotation of the input.



Mike Halloran
Pembroke Pines, FL, USA

 

[dvd]

You really ought to look at using a gear box. This is a lot of reduction for a belt drive. You might think that you are saving money, but probably not. The assembly time and engineering design time are going to chew up time and money.