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T-Top clamp sizing

Old 09-04-2020, 07:50 PM
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Default T-Top clamp sizing

Maybe a basic question but never really thought about it. I was looking to add a multiple rod holder/rocket launcher to one of the tubes on a T-Top. Before I order I just want to be sure I'm understanding the sizing correctly.

So the circumference of the tubes are just under 6 inches round....the clamps that grab the tubes say fits 2 inches. The formula I found was divide the circumference by 3.14 to get the diameter of tube......2 inches roughly.

Is this what is implied by clamp size? Surely a T top cant be 2 inches in circumference. Thing ain't cheap so I want to be sure before I place an order.
Old 09-04-2020, 08:09 PM
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Would be diameter, so 2 inch diameter rod holder. Sounds right!
Old 09-04-2020, 09:03 PM
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Weld on rod holders are not near as tricky to size as clamp ons.
The clamp ons need to be measured with a calipher, $12 instrument. An eyeball estimate on a round tube with a tape measure where thre is no exposed cut end is not accurate at all.
If the measurement is only slightly off they will not fit on, or will be too loose to stay tight even with 4 allen screws and a 5th set crew.

SS welded and clamp ons are a lot cheaper than Aluminum
Old 09-05-2020, 06:56 AM
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I always use these and not the cheap ones.

https://www.westmarine.com/buy/c-e-s...eter--18072942
Old 09-05-2020, 11:54 AM
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These are the stae of the art as far as I know, and I have tried several with a lot of failures

Notice the pointed set screws on these to keep them from twisting with heavier reels? I use a center punch to deepen the holes after they mark with the first tightening, and use thread lock.

Notice the removable rubber sleeves to make them a little more adaptive to irregular pipe and tubing sizes after the chroming process or when you want to place one closer to a bend in a pipe that also distrorts perfect roundness?

Now notice the Price.

https://tacomarine.com/sport-fishing...-f16-2623pol-1

If you have a SS top or rails, an Amarine bladed weldable SS RH will run about $22. They don't move.

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