Sea Dog 582070-1 Heavy-Duty Clamp-On Oarlock, 1/2"
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Check out the specifications page for 5/8" and 1/2" options. I ordered 5/8" only to discover that I was wearing 1/2" oar locks that appeared to be 5/8". I reemed the locks to fit using a circular file. I recommend them because they are a good, sturdy product.
An oar with a diameter of 1" is extremely small. My oar was also small, so I wrapped it in a piece of Home Depot foam pipe insulation before clamping the lock on it. It's fantastic!
They do sit up a little more than an inch, I believe. When paddling normally, I haven't noticed any rubbing on the boat's lip.
The price includes a pair of oarlocks that look exactly like the ones shown in the photo. They've met my expectations.
Selected User Reviews For Sea Dog 582070-1 Heavy-Duty Clamp-On Oarlock, 1/2"
The extra height is a plus. I have a new oar and an old oar, both of which are made of wood and have slightly different handle diameters. It was very easy to get it to fit the smaller one. The newer one was almost too big at first, but once I got two threads on it, it clamped down nicely; these fit my existing oarlocks (circa 1990's) perfectly, and the design adds about an inch of height. That was more convenient than adding blocks to the oarlock socket for clearing my new oversized rubrail.
These are monsters, far more powerful and well-made than other similar products I've used. If you've never used a clamp before, now is the time to do so. It's nice because it's one of the few designs that keeps your oars in the proper position while in and out of the water, as well as rotating around.
These were purchased in two sets for our one-person pontoon (cataraft) boats. The plastic bushings mounted in the frames allow them to swivel easily. The Carlisle oars had creeped a little in the oar locks and boogered up the paint on the oar shafts after our first day on the river, as we discovered. For our second trip out, I wrapped the shaft in two layers of electrical tape and tightened the oar locks all the way down. That appeared to be the answer. I believe that the oar lock's horse shoe will continue to bend inwards over time, and that we will need to find a new sleeve between the oar lock and the oar to keep the oar secure in the lock. I'd buy another set for a different boat without hesitation.
I had to send them back.
The oars are held in place by these, but they keep escaping the oar lock. To keep them together, I'll have to drill a hole and insert a pin.
It wasn't exactly what I was looking for, but it's a well-made product that I would recommend.
Heavy duty, but the size appears to be slightly larger than the old one we have, which is the same stated size, so these will not fit. There is also no hole at the bottom for the locking pin to be inserted. My husband will keep them and attempt to mark the adjustments on the boat, after which he will have someone drill the locking pin hole.
On my small boat, I had to drill holes in the shaft to keep the oar lock in place.