Steering gear

Steering gear is a component of the steering system that allows you to straighten the front wheels and also to increase the moment of the steering wheel, so that the steering becomes lighter. Steering gear consists of a gear or teeth that are useful as gear reduction so that the moment of driving the increase.
Teeth in the steering gear ratio is between 18 to 20:1 means 18 turns the steering wheel the same lap times will result in a Pitman arm. But for the ratio of 20:1 means the steering wheel is 20 rounds will produce 1 time round Pitman arm.
Surely you are confused what is a Pitman arm ..? I will first explain the construction of the steering gear, so you know what the Pitman arm.

Before I explain the construction is a good idea to first know the various steering gear is:

* Recirculating ball type (this type used on a large haulage vehicles)














* Rack and pinion type (this type used on vehicles with a light haulage)



How to calculate the ratio of the steering for both types of the above is:
* For the recirculating ball type formula is: number of steering wheel rotation equals the number of Pitman arm movement.

* To Rack and pinion type formula is: number of rounds equal to the amount of steering wheel turns the front wheel angle.