To be clear not throwing any dirt on Newman rollers, we bought this particular frame new, newmans are all we have. This is a cast part and not a real high quality casting FROM A SURFACE FINISH point of view.
Castings under high loads will fail and this one might have been on the lower end of the quality curve?
Also it may have had a hairline crack - fissure in it form some time or possibly just a cold shut from the day it was cast. Actually if you look at the edges of the cracks the grain structure of the metal is actually quite good
It just scared the crap out of me as I was not expecting it and very surprised to see it .
FYI we retention OFTEN... and have the torque wrench set at 45 Ft-lbs for the bolts which swim in never seize. Before someone chimes in to say the coated bolts do not need never seize we replace the standard short bolts with 1.5 inch bolts because the short bolts strip out of the lighter MZX ends ...they only catch a few threads
Anyway I am just wondering if this is an isolated issue .
mooseman