Make a subframe behind the face of the bumper so you can use the required hardware, make a cover plate that sits flush and countersink hardware into that so that the face of the bumper is smooth. you would need another inch of space to make something like that work, but it wouldnt be too hard to do.
This is also good, because when you counter sink you get rid of material, so im not sure how that effects strength.
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thanks boss for 4x4 101 , but cherokees (and everything) have been mounting winches base-down also for millennia with no issues.
if i go base forward, crosby mentioned the possibility of flat face allen head bolts last night (wish i thought of that), i just need to find shit strong enough, which i havent looked for yet
That would be clean. Just stay away from the stainless ones, they are too soft.
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Make a subframe behind the face of the bumper so you can use the required hardware, make a cover plate that sits flush and countersink hardware into that so that the face of the bumper is smooth. you would need another inch of space to make something like that work, but it wouldnt be too hard to do.
This is also good, because when you counter sink you get rid of material, so im not sure how that effects strength.
That's the way i'd do it.
if there is a large shear stress (force applied perpendicularly to the body of the fastener) on the countersunk fasteners then yes they are weaker than using standard bolt.
As long as the majority of the forces these bolts will see are normal stresses (compression/tension) then they will be fine. In this case, the surface area actually increases when countersinking.
As long as you can find grade 8 stuff and you put the fairlead on the mounting plate itself so that the forces are applied properly when you use the winch, i see no issue with it.
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I'm sure Phil can taper, I dont remember if his shop had the attachment or not
We have a taper attachment on the smaller machine.
Also, if you're worried about strength, the nuts on the bottom of my bumper holding the winch down are welded to the bumper. Could also do a few spots for extra reinforcement.
Last edited by Buffalo Phil; 10-26-2011, 07:11 PM.
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If your wanted to use cap screws it might be a better idea to counter bore them instead of counter sink because the taper will cut into the recess where the allen bit goes.
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