Ball Swivel Trailer Bunk Brackets

May 9, 2020
27
Merit 25 Lighthouse Landing
I am searching for those ball-type swivel bunk brackets. My trailer bunks are 14' treated 2X6 boards, covered in a cheap bunk carpet that seems to have no UV resistance, because the carpet nap becomes sticky, and the black dye seems to transfer to fingertips rather easily. I bought the "bunk carpet online. It's the type with the little raised ribs in the nap, running lengthwise. I hope to advance to the ball-swivel "pad" type bunks (12"X12"?)(16"X16"?)
Does anyone know of a source for those swivel-ball type bunk brackets that I see on trailers and stationary stands in my marina?
 
May 9, 2020
27
Merit 25 Lighthouse Landing
Yeah, Dave, but what I am hoping to find will not include the threaded lift parts. This trailer was designed and built by an engineer that I know, way back in 1985, who originally purchased the boat. When I bought it 5 years ago, the boat rested perfectly on the trailer as bought. When I launched her, I discovered that the long bunks were barely stable enough to have supported the boat, so I replaced them with treated 2X6-14' and covered with bunk carpet with "bunk carpet", exterior carpet adhesive, and stainless staples. Those replacements never really curved around like the originals had over many years, because I had never hauled out until just a month ago, when I just brought her out of the water to make her "Hiney Charmin' Shiney" :)

After that Ill fit, and a scary trip to the edge of the parking lot, to wash, I decided to try a more flexible two-ply composite decking trick, which turns out to be just too flexible, as shown in the photos, if you can see the low spots between the stands.

If I use the plates that I see on the website that you have suggested (Thank You!), I will need to modify the stands to a height that may interfere with the angle bracing. It may be, that I can just cut a treated 2X12 (1/2"X11 1/2") to a "2X12" Square to mount on the existing swivel brackets that you see, and just pretend that they are similar to the suggestion that you have made. I can only hope that the fore/aft angle of the plates will simply be overcome by weight, without affecting the mounting fasteners. The port/starboard angle would not be a significant issue, due to the way they self-adjust. (Wow! I'm being pretty wordy. Sorry)

Anyway, I took some photos, and welcome any input, from anyone. If I don't feel comfy with any suggestions, I'll just go to the lumber store and look for some overly crowned 2X6's to make another set of 14' bunks
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May 9, 2020
27
Merit 25 Lighthouse Landing
See how the composite decking got kinda' "lazy" after it sat on the stands for a couple of days? It would have been a very desirable alternative to the treated wood, in that carpet would not have been necessary.
 
May 9, 2020
27
Merit 25 Lighthouse Landing
In that photo, you can see how the "engineer" designer of this trailer included "cradles" that actually lift the boat off of the bunks for removal of the bunks for complete, unrestricted access to the full surface of the hull.
 
May 9, 2020
27
Merit 25 Lighthouse Landing
Those small fore and aft "cradles" are lifted via threaded rod, by nuts and washers that are run up and/or down the threaded rods. Being a non-engineer, that just blew me away.
 
May 9, 2020
27
Merit 25 Lighthouse Landing
You can see the empty cradle threaded rods if you zoom in on the first set of photos.
So, now, what do you guys think?
 
Jan 11, 2014
12,304
Sabre 362 113 Fair Haven, NY
The weight of the boat should rest on the keel. The bunks only keep it from falling over. If the weight is on the keel, then I wouldn't worry about the bunks so long as they are able to reach the hull and keep it from moving side to side, which they appear to do.
 
May 9, 2020
27
Merit 25 Lighthouse Landing
Thanks, Dave! No one ever told me that. I guess that I'll need to make sure that the keel has touched that front-edge V-shaped stop to know that the boat is far enough forward, and keep the motor at high-idle forward while I drive forward, until I'm confident that my keel is resting on its trailer rest?
 
Jan 11, 2014
12,304
Sabre 362 113 Fair Haven, NY
Thanks, Dave! No one ever told me that. I guess that I'll need to make sure that the keel has touched that front-edge V-shaped stop to know that the boat is far enough forward, and keep the motor at high-idle forward while I drive forward, until I'm confident that my keel is resting on its trailer rest?
Yes. It will be difficult to move once the boat is on the trailer. Depending on your launch site, it may be easier to have someone walk the boat on the trailer from a dock.
 
May 9, 2020
27
Merit 25 Lighthouse Landing
I'm not looking forward to cutting my trailer stands, and modifying their tops to receive $400.00 worth of new threaded, adjustable stand tops, but I just may try to sell the need to my "Financial Director" :cool:

Thanks again, Dave
 
Jan 11, 2014
12,304
Sabre 362 113 Fair Haven, NY
I'm not looking forward to cutting my trailer stands, and modifying their tops to receive $400.00 worth of new threaded, adjustable stand tops, but I just may try to sell the need to my "Financial Director" :cool:

Thanks again, Dave
Check around boat yards for abandoned cradles. The screw tops are the same. Find the right ones and you can probably get them for free or not much more. The tops are only ¾" plywood. You could actually build your own. The post is an Acme threaded steel rod, a few pieces of angle iron and plywood tops.

If there is too much weight on the bunks, the easier solution is to stick a piece of wood under the keel.
 
May 9, 2020
27
Merit 25 Lighthouse Landing
Check around boat yards for abandoned cradles. The screw tops are the same. Find the right ones and you can probably get them for free or not much more. The tops are only ¾" plywood. You could actually build your own. The post is an Acme threaded steel rod, a few pieces of angle iron and plywood tops.

If there is too much weight on the bunks, the easier solution is to stick a piece of wood under the keel.
Well, you're (almost) not gonna believe what I found... Copy & Paste in your browser...


Aarrrgh!
 
May 9, 2020
27
Merit 25 Lighthouse Landing
I was a painter for 40 years, with the last 20 years as a contractor. I used these for all of that time, and I don't know what took me so long to realize a perfect alternate purpose for these. (Old brain, maybe)