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Anonymous Poster #1

# Sprockets and Chain System Gears. Difference in Diameters.

03/16/2017 2:02 PM

I wanted to understand if we took two gears of separate diameters and connect it with belt or chain then when the big diameter gear rotates once then would the small diameter gear would rotate twice the amount of that of the first gear considering the difference between the diameters to be of 2 times . And also if we add idler gear to this system then would it rotate to that of 1.5 times(assume) that of the initial gear . And also wether there would be any energy change? do we have to give more energy when idler gear is attach with system and less energy when it is not attach with the system as a way of input to the drive gear which in thus case is 1st gear ?. Any help would be appreciated. Thanks .

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#1

### Re: Sprockets and chain system gears . Difference in diameters

03/16/2017 3:17 PM

If you have engaged gears or sprockets connected by a chain, then the speed ratio is the inverse of the ratio of teeth on each sprocket or gear. For example, it one sprocket has 15 teeth and the other 45, the first will rotate 3 times as fast as the second. Adding an idler has no effect on ratios and may only add some friction.

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#2

### Re: Sprockets and chain system gears . Difference in diameters

03/17/2017 12:48 AM

See and read conservation of angular momentum and energy. Ideal conditions those two is conserved, in real situation not. Since, you have to account transmission losses on the whole set up.

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#3

### Re: Sprockets and chain system gears . Difference in diameters

03/17/2017 5:33 AM

https://robives.com/mechs

Good site for learning about mechanisms

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Peter Jensen
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#4

### Re: Sprockets and Chain System Gears. Difference in Diameters.

03/17/2017 10:48 AM

Why do you ask, Mr. Anonymous, were you an alcoholic in your previous employment?

How do you think that the idler rotates at 1.5 the rate?

Whatever you are drinking now, please do not share.

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#5

### Re: Sprockets and Chain System Gears. Difference in Diameters.

03/17/2017 4:38 PM

Wether ≠ whether ≠ weather.

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#6

### Re: Sprockets and Chain System Gears. Difference in Diameters.

03/18/2017 9:17 PM

The rotational speed stays the same but ask yourself; "what happens to the direction"?

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#7

### Re: Sprockets and Chain System Gears. Difference in Diameters.

03/20/2017 9:45 AM

If he is lost, then why would directions matter? ROFLMAO!

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#8

### Re: Sprockets and Chain System Gears. Difference in Diameters.

03/24/2017 9:45 PM

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