Idler Gear Basics
The rule for idler gears states that these types of gears DO NOT change THIS value
What is the Gear Ratio
To find the net gear ratio of a compound gear train, you must do this to the individual ratios of the two gear sets.
What is multiply them?
If you want a robot to reach the greatest possible speed, should the Gear ratio be as high as possible or as low as possible?
What is as low as possible?
When designing for high torque to climb a slope, should the driven gear be larger or smaller than the driving gear?
What is larger?
Gear ratios are always written in this format (which gear to which gear)?
What is Driven gear to Driving gear
If Gear A has 10 Teeth and Gear C has 10 teeth (with any size idler gear), this is the resulting gear ratio.
What is 1:1?
Calculate the compound ratio for this train: A=10, B=20. B**=5, C=10.
What is 4:1?
To maximize speed using pulleys with diameters of 5cm, 7cm, and 9cm, which should be the driving pulley?
What is the 9cm pulley?
Mary and Tim have gears with 40, 24, 14, 12, and 8 teeth. Which gear should be the driven gear for the highest torque?
What is the 40 tooth gear?
If the desired gear ratio is 3:2 and you are using a 6cm diameter gear as the Driven gear, what size must the Driving gear be?
What is 4cm?
Calculate the torque(T) and speed (S) for a system where gear A = 12 teeth, Gear B = 36 teeth, and Gear C = 60 teeth.
What is the torque increase and speed decrease?
Calculate the compound gear ratio: A=10, B=40 and B**=5, C=5
What is 4:1?
to maximize speed using pulleys with diameters of 5cm, 7cm, and 9cm which should be the driven pulley?
What is the 5cm pulley?
Mary and Tim have gears with 40, 24, 14, 12, and 8 teeth. Which gear should be the driving gear for the highest torque?
What is the 8 tooth gear?
If the desired gear ratio is 3:2 and you are using a 6cm diameter gear as the driving gear, what size must the driven gear be?
What is 9cm?
Calculate the gear ratio for a system where Gear A has 84 teeth, Gear B has 12 teeth, and Gear C has 36 teeth.
What is 3:7?
Calculate the compound Gear Ratio: A=36, B=12, B**=36, C=3.
What is 36:1?
Given the following pulley sizes: 5cm, 7cm, and 9cm. What would be the best ratio to achieve the fastest speeds?
What is 5:9?
What is the gear ratio of a simple gear train using a 40-tooth driven gear and an 8-tooth driving gear?
What is 5:1?
True or False: In a simple gear train with an idler gear, the size of the idler gear changes the final torque value?
What is false?
If Gear A has 36 teeth, Gear B has 12 teeth, and Gear C has 12 teeth, the resulting ratio is as follows.
What is 1:3?
Calculate this compound Gear Ratio: A=10, B=60 and B**=5, C=60.
What is 72:1
If Mary and Tim want a gear ratio of 1:2 and have a 16-tooth driving gear, how many teeth must the driven gear have?
What is 8?
To achieve a gear ratio of 2:1 using a 16-tooth driven gear, which gear must be used as the driver?
What is an 8-tooth gear?
what is A=8, B=8 and B**=12, C=24?