The subject shaft had mounted (shrink fit) collars on the drive end and collar on the outboard end. The break was about a 1/4 past the collar. The face of the collar appeared to be "very" clean, i.e. it appeared to have been a running surface. Prior to the failure (within last week) oil analysis...
You guys have provided a wealth of information and it seems your theories match mine. By the way, the thermal growth is .0006" per inch per 100F, so we knew the growth was going to be very large. The other "funny" thing is the owner of the shaft, "lost" the piece that broke off and the remaining...
While I agree that the site mentioned is very informative, I have seen this before and think you may have a grounding issue rather than fatigue. What is the condition of your grounding brushes or shaft riders?
I have a situation with limited and need some advice and information. During the investigation of a shaft failure, it appears the owner installed a thrust collar on the outboard end of a shaft and converted the free end bearing to a thrust bearing. The only evidence available (photos) shows...
I have a situation with limited information. During the investigation of a shaft failure, it appears the owner installed a thrust collar on the outboard end of a shaft. The only evidence available shows thrust collars on the inboard shaft. It has been my experience that long shafts, especially...
