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Does the size of the front axle's kingpin tilt affect tire wear?

Release date:Nov 05,2020 Source:Yihe Axle 
Caster is a directional stability angle only. Incorrect caster by itself will not affect tire wear. 
Most heavyduty trucks front axle are designed with some degree of positive caster. 
Positive caster creates a trailing force in the front wheels, which tends to keep them tracking straight ahead. 
Positive caster tends to make the steering axle wheels want to return to a straight-ahead position after a turn has been made. 
The principle is exactly the same as that used in tilting the front fork of a bicycle, which makes it possible to ride the bicycle without holding the handlebars. 
It is the opposite of the wobble-wheel effect of a supermarket pushcart when mobile.
Positive caster also means that when the front wheels of the truck are turned, one side of the vehicle raises slightly when the other side is lowered. 
When the steering wheel is released, the weight of the vehicle forces the lifted side downward, resulting in the wheels returning to a straight-ahead steering track. 
In other words, positive caster produces a condition in which the right wheel resists a right turn and the left wheel resists a left turn. The further into a turn, the more this resistance increases.
Caster settings generally affect steering performance in the following ways:
 Too little caster can cause wheel instability, wandering, and poor wheel recovery.
 Too much caster can result in hard steering, darting, oversteer, and low speed shimmy.

Recommended Caster Settings
Vehicle manufacturers specify varying caster settings, depending on the truck model, what type of load it is to carry, whether it is a tandem or single drive axle, and whether it has manual or power steering. 
The objective is to provide just enough positive caster to ensure wheel stability and good wheel recovery. 

The following settings are some examples used for vehicles with manual steering gear,front axle measured weight down on a level floor:

frame rail

 Tandem drive front axle: 1/2–11/2 degrees positive.
 Single drive: 11/2–21/2 degrees positive.
 No more than 1/2 degree difference between the left and right wheels.
 Positive caster on the left wheel should not be greater than on the right.
Caster specifications front axleare based on vehicle design load (no payload), which will usually result in a level frame.
 If the frame is not level when alignment checks are made, this must be factored in the caster measurement. 
With the vehicle on a smooth, level surface, measure the frame angle with a protractor or inclinometer placed on a frame rail, as shown in Figure. 
【Tag of this article】:Axle Front beam Truck axle Front Axle Steering Axles
【Editor】:Yihe Axleall rights reserved:https://chinaaxle.netPlease indicate the source

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