a gear in Ur gear box witch allows for a means of reverse
used in clockstores
Planetary gears can be spur or helical gears.
Spur Gears.
Spur gears have straight teeth while helical gears have curved teeth. Generally, helical gears are usually quieter and smoother in operation, while spur gears are easier to make and much less expensive.Helical gears are stronger than spur gears.
The power output of a motor can be changed by the use of gears. Gears can be used to increase torque by reducing the speed of the output shaft by placing a large gear on the output shaft, coupled to a smaller gear. Conversely, by using a small gear on the output shaft, coupled to a larger gear, the speed can be increased with a reduction in torque.
worm gears are used in machines that need high gear ratiosspoonsWorm gears are found in some kinds of 90 degree gearing junctions, generally with a large change in gearing ratio.For example, many tillers have worm gears between the input shaft and the crosswise tines.Since a motorcycle doesn't need a true differential, it may also have a worm gear connecting the drive shaft to the rear wheel.An adjustable end wrench (Crescent Wrench) also has a worm gear for adjustment, and it is easily visible.There are some devices such as a telescope stand that have precision adjustment with a worm gear, especially if the only adjust through a fraction of a circle.Worm gears are used to reduce speed. They can be found in factories. Google it to buy one.
A simple gear train with idler is a gear train the contains 3 gears. These gears are called the driver, idler, and driven or follower. The idler merely changes the direction of the follower so that it is the same as the driver.
An Idler Gear is usually used to maintain a stable tension on a belt or chain, OR it is used to redirect the position of the belt or chain. An idler gear transmits no power to or from the belt or chain.
reverse
An "idler" is typically used for tensioning of a belt, as in the timing belt, or a chain.
Planetary gears can be spur or helical gears.
Roller Shutter Doors
GEARS
Simple Gears are machine elements that transmit motions by means of successfully engaging teeth.
Spur Gears.
all i know is it can be used in a transmission goodbye
Bevel gears can be used to change the direction of drive in a gear system by 90 degrees
FOR THE REAR END, HYPOID GEARS ARE USED.