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timing pulley ratios

timing pulley ratios

timing pulley ratios

(OP)
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.
 

RE: timing pulley ratios

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

RE: timing pulley ratios

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.

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