ring gear
In the differential of auto/truck.
A crown and pinion are used in steering and driving. A pinion gear is used to steer against the force of gravity, while the crown is a wheel with cogs lining along its rim.
a bull gear is used as common driver for pinion gears that are installed on the shaft for each rotor.
That's the drive gear assembly in your rear differential ( the center part that is bigger )
They are used to check pinion and ring gear alignment. If you apply paste to the ring gear and spin it and have a pattern to close to the outer edge(toe) you would need more/thick pinion shims. A heel pattern would be the oposite.
They used a few of them. Open the cover, count the teeth on the big gear ( the ring gear ) next count the teeth on the small gear ( the pinion gear). Divide the big gear by the little gear and that is your ratio.
'''Recirculating-ball steering''' is used on many trucks and SUVs today. The linkage that turns the wheels is slightly different than on a rack-and-pinion system. You can image the gear in two parts. The first part is a block of metal with a threaded hole in it. This block has gear teeth cut into the outside of it, which engage a gear that moves the'''pitman arm'''
An intermediate shaft is a part of a car. It connects the end of the steering column to the rack and pinion gear box and is used to eliminate torque sheer.
Variable ratio (VR) steering means that the ratio between the steering wheel and the wheels (tires) is not constant. Depending on the position of the steering wheel the car wheels may be more or less sensitive to steering wheel rotation. Practically, when you drive straight (steering wheels in neutral position) the steering ratio is about 2 times higher compare to steering ration when you are parking (steering wheels is away from neutral position). Variable ratio rack and pinion is used in VR steering. It was originally invented in Australia and later improved in the USA. Variable ratio rack and pinion software is used for calculation of the complex tooth surface of the vr rack.
Most of the small gear wheels (in RC cars for example) are made of Nylon (PA). Often big cog wheels for heavy duty purposes are made of Nylon strengthened with glas fiber or they are made of some more exotic composite materials.... There are thousands of possibilities.
Pulleys and gears are used to transfer rotary motion from one place to another. Both are wheels. Pulleys are wheels with grooves in the rims, in which a belt or rope can run. Pulleys can transfer rotary motion from one shaft to another or can be used to lift heavy loads.Gears are wheels with teeth evenly spaced around the rims. Several gears can be placed, so that their teeth interlock, or mesh. When two or more gears are used together, they form what is called a gear train. Gears can be used to change the speed and direction in which something rotates. When chains are used to connect the "gears", a chain and sprocket system is formed, for example on bicycles and motorcycles.Simple pulley
The crown and pinion mechanism is found in lots of things.