A Spur gear is a gear and it can change the speed and direction of motion. You have to shift your gears in order to make your gears work. If you don't know how to, ask Google or ask Wiki answers for a better answer on what to do. Remember, all gears need to be shifted at a certain period of time.
A spur gear.
Spur Gear is the most efficient
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Reverse gear is spur because it has to slide, sliding mesh gearbox uses spur gears. Because if it was constant mesh gear (helical) it could not slide in and out, therefore it could not go in the opposite direction of rotation.
Planetary gears can be spur or helical gears.
One of the most common types of gears is the Spur Gear. They are most round with teeth along the edging. Spur Gears are used in oscillating sprinklers or fans, windup clocks, washing machines and dyers.
the module of a helical gear is calculated in the same way of that of a spur gear: module=pitch diameter / no of teeth the module of a helical gear is calculated in the same way of that of a spur gear: module=pitch diameter / no of teeth
Spur gears give 180 degree drive, and worm gears give 90 degree drive.
Helical gears are similar to spur gear except it's teeth are slant. They have good load distribution, less noise and less wear compare to spur gear.
Spur Gears.
spur
everyone one shold know that while being the terminator Arnold swartzinator(aka the govinator) invent the spur gear while acting.