I'm looking for a better way to keep this cam from moving on it's shaft.
This is on a printing machine. The cam lifts the weight of the print head of the machine on a stationary follower. The problem is that the cam is only held in place by 2 set screws (which have held pretty well to this point) and the set screws will loosen and allow the cam to move on the shaft and eventually the cam will start hitting the frame of the press. Loctite does not help. On this type of press this is a common problem. One solution I have seen is to split the mounting boss and make it clamp the shaft. Not impossible, but it requires a lot of downtime and a trip to a machine shop. Thought about drilling a divot in the shaft to catch one of the set screws, but don't want to end up chewing up the shaft if that does not hold. Ideas or suggestions from the collective would be welcome.