Hitch custom fabrication
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I added all 3 costs, then decided I could buy a welder and the steel for much less. | I added all 3 costs, then decided I could buy a welder and the steel for much less. | ||
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Read everything I've typed before starting. | Read everything I've typed before starting. | ||
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Once the wooden mockup is built, bolt it to the chassis exactly as if it were steel. Then go for a test drive. If you manage to rip it loose, then you need to revise the design, or stay off the Rubicon trail, if that's where you freed it :) | Once the wooden mockup is built, bolt it to the chassis exactly as if it were steel. Then go for a test drive. If you manage to rip it loose, then you need to revise the design, or stay off the Rubicon trail, if that's where you freed it :) | ||
| − | If you're bolting to an actual frame, such as my pickups, then use at least 3 bolts per side, 1/2" grade 8. If not, then plan on welding in large steel plates, probably 1/8"-thick, to spread the load out. Plan on more plates inside, and plenty of through-bolts to sandwich as much of the chassis as possible. This is how racing roll-cages are secured to cars without frames ( like my Trans Am ) Typically those sandwich plates are like 6" x 6", so plan accordingly. | + | If you're bolting to an actual frame, such as my pickups, then use at least 3 bolts per side, 1/2" grade 8. If not, then plan on welding in large steel plates, probably 1/8"-thick, to spread the load out. Plan on more plates inside, and plenty of through-bolts to sandwich as much of the chassis as possible. This is how racing roll-cages are secured to cars without frames (like my Trans Am) Typically those sandwich plates are like 6" x 6", so plan accordingly. |
If you have a length issue, note that adding length is best done in the side-plates, not the tail tube. Tail tubes come 12", so that's 9.5" past the cross-tube. If you must add length to the tail tube, then plan on up-sizing every tube by 1/2", and using a reducer inside the tail end. | If you have a length issue, note that adding length is best done in the side-plates, not the tail tube. Tail tubes come 12", so that's 9.5" past the cross-tube. If you must add length to the tail tube, then plan on up-sizing every tube by 1/2", and using a reducer inside the tail end. | ||
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Don't paint it yet, just clean up all the welds. Re-attach it to the vehicle, with the final bolts, but grade 5 nuts. Now go find a trailer 50% heavier than you expect to ever tow, and have it brought to a deserted country road at a very non-busy daylight hour. Hopefully a rough road. If your hitch is going to pop a weld or otherwise fail, you want it to happen here and now. And you want the guy in the pickup close by. So, drive rough, with your window down and your radio off. If you hear any metallic noises, stop and cautiously investigate. | Don't paint it yet, just clean up all the welds. Re-attach it to the vehicle, with the final bolts, but grade 5 nuts. Now go find a trailer 50% heavier than you expect to ever tow, and have it brought to a deserted country road at a very non-busy daylight hour. Hopefully a rough road. If your hitch is going to pop a weld or otherwise fail, you want it to happen here and now. And you want the guy in the pickup close by. So, drive rough, with your window down and your radio off. If you hear any metallic noises, stop and cautiously investigate. | ||
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Once you're satisfied with your deliberate abuse, put the trailer back on the pickup, and go remove your hitch for inspection, then repair and more testing, or painting and final installation. | Once you're satisfied with your deliberate abuse, put the trailer back on the pickup, and go remove your hitch for inspection, then repair and more testing, or painting and final installation. | ||
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