06-01-2018, 11:21 AM
(05-01-2018, 10:39 PM)David Cochrane Wrote: A mechanical design engineer once told me that the torque specified for tightening nuts & bolts was for dry threads. Putting lubricant on the threads causes the friction between the parts to lessen drastically, which can result in excessive load on the fastener. Some years ago I had a complaint from a customer (who really should have known better) that he had wound the end off one of my halfshafts when tightening the castellated nut. Casual questioning revealed that he had liberally applied oil to everything (including the tapers)...
Did the end of the half shaft fail before the threads?