I have seen roll pins used for many years in Claas combines with no problems whatsoever. They were used to hold sprockets on elevator chains and universal joints to shafts. There were even one holding the main drive pulley from the engine to the gearbox.
The thing we were always taught was the spilt goes towards the load, when the pressure comes on the split tends to widen and lock the pin tighter whereas if the load is on the side with the split 90 degrees to it, the pin will close and drop out.
In high load applications, a smaller pin can be driven into the main one to help stop it collapsing.
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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