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Say 50 teeth divided by 5. That is a ten to one ratio.
Count the number of teeth.
The gear ratio is the number of teeth in the driven gear divided by the number of teeth in the drive gear.
You divide the number of teeth on the small gear into the number from the larger gear. -The answer is your ratio.
The best way is to count the teeth on the ring gear and divide by the number of teeth on the pinion gear. Or you can count the number of turns of the pinion it takes to get one full turn of the ring gear. For example, if we divide a ring gear with 41 teeth by a pinion gear with 10 teeth we find that the gear ratio is 4.10:1 (41/10 = 4.10).
That is a 4:10 gear ratio. Just divide the number of teeth on ring gear into the number of teeth on the pinion gear and then round it off and that will be the gear ratio.
Number of Driven Gear Teeth (Output)/Number of Driver Gear Teeth (Input)
Number of teeth on driven gear divided by teeth on driven gear.
Gear ratio of bevel gears isnumber of ring gear teeth divided by number of pinion gear teeth.
Number of teeth on driven gear divided by teeth on driven gear. Example: 40 teeth on a ring gear and 10 teeth on a pinion will be a 4.00:1 ratio.
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Gear ratio of bevel gears isnumber of ring gear teeth divided by number of pinion gear teeth.