Re: Gearing and Math Question ....

Posted by Ranger John on November 13, 2005 at 11:14:48 from (68.249.0.119):

In Reply to: Gearing and Math Question .... posted by Gyro Gearloose on November 13, 2005 at 05:20:50:

When it comes to gears and pulleys one should think of them as continous levers. What creates the mechanical advantage is the radius of each wheel. When you build the ratio of r1 over r2 you get the mechanical advantage. If r1/r2 > 1 then you increase speed and decrease force. Of course the opposite is also true.

As for the size of the teeth, they need to be nearly the same for smooth operation.

When it gets to be fun is when you have angles cut in the teeth. Using a bit of trig and calculus to can minimize the shearing of teeth in high torque usage.

But in agreement with other posters the size doesn"t make much difference except that the larger might give you more tooth contact which will give you more resistance to breakage.

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