What forces are applied

[manoswath]

I am to test a steering system. What would be the maximum lateral force applied to a rack and pinion component? Or for durability, a constant resistive force applied to a rack or a heavy truck steering gearbox pitman arm. Any manufacture's specifications to reference?

 

[GregLocock]

That depends entirely on the lever arm ratio, the mass of the vehicle, and the abuse condition which you want to work to.

You could work out what other manufacturers use by reverse engineering their designs, or talking to your suppliers, or figuring out what loads any broken parts you have, saw.



Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[Fabrico]

The broken, bent, or buckled parts approach would be the most accurate. Admittedly not very scientific, but the steering box should basically outdo anything the tie rods and/or joints can do.

 

[GregLocock]

The accurate way is to strain gauge the arms and then test them.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.