Re: Re: Gear Ratio Math?

Posted by bbott on January 19, 2002 at 17:00:48 from (206.13.45.103):

In Reply to: Re: Gear Ratio Math? posted by Alberta Mike on January 19, 2002 at 13:55:51:

AFAIK Idler gears don't count in gear ratio calculations.

They turn a tooth-for-a-tooth with the driver and don't change the driver/driven ratio. However, they do reverse direction of rotation of the driven gear.

Think of it this way.. 1 turn of a 40 tooth driver will rotate the idler 40 teeth... which will rotate the driven gear 40 teeth. Just as if they were in mesh without an idler.

I don't see anything wrong with his orginal math.

-- bbott

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