How to Check Gear Ratio

Gears can be found in all kinds of mechanical gadgets, but they are especially prevalent in motors. They look like wheels with grooves cut into them. These grooves keep the gears in place while they are turning. The gear ratio of a motor refers to the number of input shaft turns in relation to the number of turns by the output shaft. Count out the number of teeth on the pinion and ring gears then do some basic math to determine the gear ratio.

Instructions

1. Count the number of teeth on the driver gear, also known as the pinion gear. For this example, we will assume there are 60 teeth.

2. Count the number of teeth on the load gear, or the ring gear. Let's assume there are 30 teeth.

3. Divide the number of teeth on the ring gear by the number of teeth on the pinion gear. This final number is the gear ratio. Using the examples above, the gear ratio is 60 divided by 30, or a gear ratio of 2.

References

• Technology Student: Gear Ratio
• 5 Speeds: Wide and Close Ratios Defined
• Weird Richard: Gears and Gear Ratios