Gears can change direction of rotational force from one axis to another. For example, a wind driven mill. The wind turns a shaft that is horizontal. That shaft turns a gear that is vertical, and the vertical gear meshes with a horizontal gear that turns a vertical shaft. Gears can change rotational speed. With a small gear meshed and turning a larger gear, the larger gear will have a slower RPM. Gears can change torque to increase or decrease available power. A small low force gear driving a larger gear will provide more rotational force.
The steering wheel is connected to a shaft that goes out of the passenger compartment and into the engine compartment. At the end of that shaft there is a gear that is called a pinion gear. The pinion gear meshes with the steering rack [gear] that runs left and right on bottom of car behind engine. The rack is responsible for pushing tires left & right (via other parts that connect rack to wheels) as you turn steering wheel.
The steering wheel is connected to a shaft that goes out of the passenger compartment and into the engine compartment. At the end of that shaft there is a gear that is called a pinion gear. The pinion gear meshes with the steering rack [gear] that runs left and right on bottom of car behind engine. The rack is responsible for pushing tires left & right (via other parts that connect rack to wheels) as you turn steering wheel.
The pinion gear meshes with the steering rack.
internaltractor pinon shaft
a gear found in the differential that meshes with the crown wheel to deliver drive threw a 90 degree angle to the road wheel
you have to change the ring and pinon gars
The belt is made or rubber and drives the cam. A gear is just that, a gear which is a metal or plastic part with teeth on it that meshes with a belt or another gear.
Worm gear
I really need a little more info. Is the steering wheel spinning and nothing is happening ? If so, there is a gear that meshes with a fan shaped gear. Usually what happens is the bushing goes out and does not hold the gear close enough to the fan gear. The bushing is located on the steering shaft and only costs about 8 bucks. Not to bad to replace. Bill, Texas- good luck
Reduction in gear ratio form one gear to another such as a rear axle ring & pinion gear allows each component to complete revolutions per minute at different speeds in relation to one another. this can allow more power from an engine to be transmitted for example to the drive shaft as the drive shaft turns faster - thus turning the pinion gear faster than the ring gear that it meshes to in the rear axle assembly so the engine speed then turns the ring gear at at different rate - inturn the wheels of a truck turn at a slower rate then the drive shaft that is attached to the pinion gear - so the truck can rev the engine and the gear ratio allows the gears turning engine in relation to truck axle at different speeds to use more power to be sent to the axle & truck wheels.
It'd be a fairly strange BMX if it has a gear shaft. Most "real" BMXes are single speed, their driveline consists of cranks, a bottom bracket and the rear hub. No gear shaft there.