Which type of gear has teeth that are shaped like a screw thread?

In a gear train, if the driver gear has 10 teeth and the driven gear has 30 teeth, what is the gear ratio?

What happens to speed when the gear ratio is less than 1?

Which type of gear is used to change direction of rotation in a shaft?

What is the gear ratio of a gear system with 20 teeth on the input gear and 40 teeth on the output gear?

Which type of gear has teeth that are straight and parallel to the axis of the gear?

What is the gear ratio if the input gear has 12 teeth and the output gear has 4 teeth?

What type of gear has teeth that are cut on an angle to the face of the gear?

What type of gear system is used to change the direction of motion?

Which type of gear is often used in automotive transmissions?

What is the purpose of gears in a machine?

Which type of gear is often used in conveyor systems?

Which type of gear is known for its quiet operation and high efficiency?