My company manufactures monorail type cranes and carriers using proprietary patented track. Some of our trolleys (carriers) have side guide rollers, See the attachment. We have a situation in which we are getting an unusual amount of wear on the guide rollers. two trolleys are tied together with a loadbar and the load is suspended from an eyebolt in the center. The trolleys in question have a 2500 lb. capacity per 2-wheels and are travelling around a large radius curve at about 75 FPM, pulled by a tractor. This system has been in use only a few months, with near constant travel in one direction only. The rollers contact the side of the rail but generally should not be seeing a load greater than 15% of the vertical load, on two rollers. Thus far the wear is approximately 0.001" deep.
Is there a way to calculate the approximate radial load which would cause the wear?