Tech Tips: Rod Ends

	Although not one of the most expensive components of a race car, rod ends play a major role in a race car’s suspension.  The fact of the matter is that you are probably not aware of the important role they play until they fail.  Whether you call them by their technical name, spherical rod bearing or simply call them by the more common term, rod end—they all perform the same function.
Although not the most expensive component on your race car; they can cost you the most!	A rod end allows two components to be connected together while allowing them to either swivel or rotate.  This delivers more precise control, better load carrying capacity and more flexibility.

In a recent magazine article several rod end suppliers were asked how a consumer best goes about selecting the right rod end for their application.  Although each weighed in with technical explanations of radial static load capacities and axial load capacities, it was best put by the gentleman who said you need to keep two things in mind; buy the highest quality you can afford and rely on the experience of the shops that supply racers in your particular niche.

The article wrapped with each of the experts providing a tip on installation and usage.  Here are the responses:
Make sure you always use the proper jam nut and make sure that it is secure.  Jam nuts should be tightened against the end of the rod end to lock it in the correct position.  Using the wrong jam nut or not tightening the jam nut can cause shifting or rotation causing the bearing to bind and utlimately break.
When installed make sure you are getting full usage of the bearing.  Make sure that it can rotate freely.  If need be use a cone spacer or high-misalignment spacer.
Make sure that when installed you have at least 1-1/2 times the threaded shank diameter screwed into the mating component.
Make sure to get into a routine of regular maintenance cleaning, inspecting and lubricating the bearing.
It is a good idea to regularly replace rod ends.  Excessive play is a good indicaton of wear.  It is a good habit to replace rod ends as part of your winter re-build process.