Re: Purchasing a rivit gun and rivits

In Reply to: Purchasing a rivit gun and rivits posted by Glenn on January 11, 2006 at 15:41:38:

An aluminum blind rivit should work fine...But one should understand the nature of a blind rivit...Shear force, or the force put on the side of the rivit, is not nearly the strength of a solid rivit...The shear factor is based on the rivit diameter, material of the rivit and mandrel...A 3/16" alum. rivit with aluminum mandrel has a shear factor of 315 lbs...A 3/16" alum. rivit but with a steel mandrel has a shear factor of 445 lbs...What does this mean?...It means any blind rivit fastened PARALLEL with the water applies...Example: My Harbercraft used 3/16" alum. blind rivits with steel mandrel in 12 places...Under the stern bench and a cover to the bow bench fastened to a rib...All but 3 rivits sheared...All blind rivits fastening to the rib sheared...

Any blind rivit fastened perpendicular to the water does not apply shear factor (sort of)...Does this make sense?...

None of the blind rivits in my boat failed that were fastened perpendicular to the water...

So, my question is: If you have the a good plan and all the materials, why can't you remove the bench to access the flotation?...Remove the flotation and then rivit with solid rivits your bracket...

Michael J.

	The Ez-Coil Spring Rewinding Tool