Originally Posted by Colorado Ice
I'm using Cobra locks and a DRE frame tower. The Cobras come with a split ring to retain the lock in the tower. But with the DRE towers the split ring tends to bind when the lock shaft turns. Eventually this binding deforms the split ring. I have also secured the lock in the tower using a small nut/bolt combination. I have recently started using a slightly smaller diameter split ring but that does not completely eliminate the binding.I have been told that this binding of the split ring is unique to the DRE towers.
This design looks to me like the use of a split ring to retain the lock in the tower is intended to allow the oar lock to pull out of the tower when unusually loaded and protect the lock and tower from damage. A nut/bolt combination would require much more force to remove the lock from the tower compared to the split ring. Defeating the design intent.
Any comments appreciated
I had the same problem with split rings with my geometry. They would get deformed to the point the washer and spring would slide past the ring and end up in the water. My friend once jammed his oar and deformed his split ring with the upward force against the tower enough that the oarlock slid out of the tower with the deformed ring still attached. Of course, he couldn't reinsert the tower with the ring still attached and lost control in the middle of a rapid.
Here is my simple solution that my friend adopted and neither of us has had a problem in two years.
This piece of zinc coated hardware only costs a few bucks and is readily available. I needed to drill out the hole in the oarlock a bit to get it to pass through. Actually, I used a bit about the same size as the original hole and rounded the edges so the tight radius of the clip could pass through.
Works for me, hope it helps.