Originally Posted by TimmyB
I've got two friends with broken swingouts. One's a jeep (was single sheer), the other was a second gen. I don't remember how the spindle was attached with the second gen, but it was determined that was because of a bad batch of metal with the spindle. The jeep on the other hand, had no defective parts, and I think it breaking had a lot to do with being single sheer. YMMV.
I truly hope it works out for you, and as I mentioned - am not trying to bash design or anything. I am just trying to understand the thinking behind this design so I can learn from it.
That's what I was referring to about the plating/gussetting.. how it actually attaches to the bumper on the inside/underside. I have also seen (on the internet, FWIW, which isn't much!), swingouts ripped out when they're just attached to one point of the bumper plating, and not reinforced with vertical gussets behind the plate bumper / etc. I try to not make assumptions on how the bumper was built, when I can't tell - hence asking the method.
My concern is that is basically 1.5 sheer IMO. That top part sort of makes it double, but a single bolt holding that top part on, could still allow it to pivot, sort of defeating it being double sheer. So, I was wondering how it was beefed up in the context of single sheer (tied into multiple parts of the plate bumper, additional gussets/plating/etc. Do you have a picture of the inside of the bumper?
And yes, plenty of people apparently have single sheer bumpers without problems. As it so happens, of my two local friends with swingouts, both are broken. So, I'm trying to avoid that when I build mine.
No. See above.
I get dumber daily. The older I get the less I know. And I only drive my truck to home depot
on saturday mornings so people will think I look cool in the parking lot, so my opinion doesn't matter anyways.
As mentioned, I have no idea how the spindle is tied in, hence why I asked. S'pose I could have guessed too, but then again, I've never been good at go fish.
Originally Posted by Box Rocket
I don't see any problem with this setup, actually it is a nice solution to make the swingout double shear. Remember most people usually just run single shear with the spindle. My guess is the spindle is fully welded at the top of the bumper and runs through and is also welded at the bottom of the bumper so there isn't just one attachment taking all the force on the spindle. That would still be single shear but this setup with the double shear just adds some support. Should be trouble free from what I can see. Nicely done.
^^^ This. (I'm surfing back through the months of missed TW stuff... sorry to dredge up old info). Also, thanks for the compliments Box, your build inspires much of what I'm doing, as does your attention to detail.
The spindle is run through both sides of 2x6 tube 3/16" thick, fully welded on both ends and braced back to the 1/4" mounting plate via the bed sliders. The design mimics production spindle mounts that I've seen on various companies bumpers, and independent fabricators work. I believe the spindle is supported sufficiently without the dual sheer, but added the DS as an extra safety to help reduce the amount of deflection at the spindle.
The angle of the DS bracket is also positioned as such that it will help add torsional rigidity to the spindle in both the open and closed positions. The bolt is 1/2" grade 8... 1/2" grade 8 bolts have a single sheer strength of 17,000 lbs (link
). The bolt torque capacity of the 1/2-20 bolt I used is also good for up to 128ft-lbs, which applies a clamp load of over 14,0000lbs. The DS bracket that came with this spindle was designed to be welded onto the bumper, but I decided to go this route for overall simplicity and versatility. I've also got a bad shoulder (due, in part, to drilling the holes for the spindles), so not having a humungous bumper/tire carrier assembly to move around my shop is a bonus
Anywho, glad you're happy with the bumper, Brett! If anyone has any questions about the bumper I'm happy to answer; as you know, I've put a lot of thought into it