Gear Ratio
Basics
Basics
Gear ratio is the relationship between these two things.
What are the number of teeth or size of two meshing gears?
When two gears mesh, they rotate in this relative direction.
What is opposite directions?
Driver gear: 12 teeth, driven gear: 24 teeth. Gear ratio is this.
What is 1:2?
This machine uses gears to transfer power from pedals to wheels.
What is a bicycle?
This unit is used to measure rotational speed.
What is RPM (revolutions per minute)?
If Gear A has 10 teeth and Gear B has 20 teeth, this is the gear ratio.
What is 1:2?
Adding this type of gear between two gears keeps the direction the same.
What is an idler gear?
Driver: 20 teeth, driven: 10 teeth. Output speed compared to input is this.
What is 2× faster?
In cars, gear ratios are adjusted using this system.
What is the transmission?
If two gears have the same number of teeth, the ratio is this.
What is 1:1?
A gear ratio greater than 1 means this happens to torque.
What is torque increases?
If a small gear drives a large gear, the output speed will do this.
What is decrease?
A 15-tooth gear drives a 45-tooth gear. The ratio is this.
What is 1:3?
Low gear in a car provides more of this.
What is torque?
A gear ratio of 4:1 means the driver must turn this many times for the driven gear to turn once.
What is 4 times?
A gear ratio less than 1 means this happens to speed.
What is speed increases?
If Gear A spins at 100 RPM and the ratio is 1:2, Gear B spins at this speed.
What is 50 RPM?
If input speed is 120 RPM and ratio is 3:1, output speed is this.
What is 360 RPM?
High gear in a car provides more of this.
What is speed?
This happens to torque when speed increases in a gear system.
What is torque decreases?
This term describes the gear that provides the input motion.
What is the driver gear?
In a simple gear train with 3 gears, this gear does not affect the overall ratio.
What is the idler gear?
Driver: 8 teeth → idler: 16 teeth → driven: 32 teeth. Overall ratio is this.
What is 1:4?
This type of gear system is commonly used in clocks to control movement precisely.
What is a gear train?
In compound gear trains, overall ratio is found by doing this to individual ratios.
What is multiplying them?