Maybe something like this would work ?
That's just a sample...the I.D. is probably too small for the size of the bolt you'd be using but that's the last one I had in my history
that I used for a project
Or maybe a "shoulder spacer" that has a lip on one end?
I should have said "I've always heard that 18-8 doesn't react to aluminum" in that prior post....I've used that combination in a few marine
applications with no adverse condition developing so far.....
It is also my understanding that Anodized aluminum
won't react to stainless unless you accidentally damage the coating. It's possible that the base for the ram is steel and there is a nylon sleeve or a bushing of some sort between the two metals. In our case, the rod inside the ram is stainless but is not in contact with the aluminum casing of the ram due to the bushings and seals
. Our mounting plate appears to be steel but again there is a beveled bushing that prevents the two metals from making direct contact and the base has a heavy coating on it.
As for how far apart to make the mounting holes for the plates, I'm no engineer
, but it seems you could get into a rabbit hole of calculations for the amount of force the ram could potentially exert and strength of the supporting materials. I'd think that you'd run into a limitation of space before you reached the optimal distance between the bolts and plate thickness so I'd go with as much distance as you can get and still be practical with access and available flat surface area. I'm assuming the fiberglass
area is cored since you mentioned having wood involved so you could remove the wood or coring in the area of the holes and fill the area with resin to reinforce it and remove the worries about water
intrusion through the bolt openings.
Hope that helps....
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