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  #1  
Old 09-22-2021, 07:15 AM
markb11 markb11 is offline
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Default Boat Grab Handle Mounting Question

I’m mounting a single handle DIVE-N-DOG L-F-12-1 STAINLESS STEEL 12 INCH LONG FEMALE CUSTOM EXTRA WIDE BOAT GRAB RAIL / HANDLE to the back of my 219 Pro V GL to assist with getting back in the boat via the 3 step ladder I installed. The question is, the mounting surface where I need to put the handle has a slight curvature to it…so…what should I use between the handle mounting area and the fiberglass boat mounting surface to negate the slight curve? Any suggestions? Thanks in advance for your valued input.
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  #2  
Old 09-22-2021, 08:26 AM
therealjoeblow therealjoeblow is offline
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Find someone with a 3D printer to print you some custom wedges out of a high density material to go under the mounting pads of the handle.
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Old 09-22-2021, 08:31 AM
Misdirection Misdirection is offline
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I'd try toilet shims. You can grind down or cut off any excess that shows.

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Old 09-22-2021, 09:05 AM
Huntindave Huntindave is online now
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I use thickened epoxy to "cast" an exact fit shim. This will give you full support for your grab rail handle. Also depends on how the hull is formed (hollow core, foam core, single layer) at the exact point at which one is going to be mounting the hardware.

Do a you tube search for "bedding boat hardware in thickened epoxy" for more information.
one example;
https://www.youtube.com/watch?v=L-Y0cIS6fSA
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  #5  
Old 09-22-2021, 11:00 AM
REW REW is offline
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Mark,
You use the word - SLIGHT - when referring to the curve on the mounting surface.

I would measure the height of the curve and then take a look at the object that you want to mount on that surface.

For myself, if the difference was only 1/16th or so, I would use a sander or grinder on the objects mounting face and grind material off of the object to be mounted so that the object mounted perfectly on the surface.

For this particular item, I am making an assumption that it is solid metal and not hollow.

If the item was hollow, of course I would then use a shim as has been suggested by others.

If you do have a solid object and it would make sense to have the base of the object changed to match the contour of the mounting surface, but do not have the tools to do the shaping, then - swing by a machine shop and have them mill the part to perfection before mounting.


Take care
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Old 09-22-2021, 11:03 AM
REW REW is offline
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P.S.
Also for mounting such a grab handle on the fiberglass surface, be sure to use thru bolts through the fiberglass along with a backing plate on the inside of the fiberglass surface with fender washers and stainless steel locking nuts to insure a long lived permanent installation.

Best wishes
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  #7  
Old 09-26-2021, 07:24 AM
markb11 markb11 is offline
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Thanks for all the great suggestions...as always the WC community comes thru!

Since curve is 1/16 - 1/8, I plan on figuring out the radius, cutting a wooden circle for same, glue sandpaper to OD of wooden circle, chuck up in drill and sand the solid grab handle mounting surface to duplicate the curvature for a solid mount.

Thanks again for all the help.
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