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If I’m guessing correctly how your going to use this, unfortunately your bolt is in a bending, not shear scenario. If you could sleeve a snug fitting pipe inside or outside of your tow bar tube then weld a lug or something on that for your chain, then your bolt would be in a double shear. Not trying to bust your chops, just want to see you get your truck home uneventfully. It may work as is? And as always a set of crossed safety chains will at least keep the truck from getting completely away from you.Hey jbulack, I looked up shear strength of gr. 8 bolts, Here what I foundThe shear strength of a grade 8 bolt is 90,000 psi, assuming the bolt is between 1/4 inch to 1 inch. Shear strength is typically estimated to be 60 percent of tensile strength. The tensile strength of a grade 8 bolt is at least 150,000 psi. All grade 8 bolts have the same tensile strength per square inch. Thus, the larger the bolt, the stronger the tensile strength of the bolt. Shear strength must be calculated, because the American Society for Testing and Materials does not require shear strength values to be published. To calculate tensile strength of a bolt, the tensile stress area should be multiplied by 150,000 psi
It seems to me these values far exceed the tention that will be imposed by towing a rolling vrhicle. even a 15000 pound deuce....
I worked at a "machine shop" at that time so I had a buddy turn the threads on his lathe. Then I heated and bent the bolts. Stainless Steel is real tricky to bend, but at "Kolstrand Marine" we where one of the main suppliers for the Northwest fishing fleet out of Seattle. We sold tons of Stainless Steel products. Literally ! So we had special tricks on bending Stainless Steel. I was pretty good at it too. I ended up being the only one bending Stainless Steel at Kolstrand for years. I even developed the Stainless Steel "Halibut Hook" . They needed to be able to hold a bend with a 500 Ibs Halibut on the end of it. I used to demonstrate this by taking a three foot Hook and ramming it in one of the overhead beams and doing a pull-up on it. With only 1/2" or less of the hook in the beam it still held my weight which was 200 Ibs at that time. The fishermen loved it ! The hooks would now last for years instead of just one season.Thank you for shaing. I am impressed with the 3/4 stainless j bolts you made. Did you thread the round bar yourself? Did you use special dies in your threader? How did you heat and bend the j bolt into shape?
It is a treat when you run against a problem, a tough one, and then (thinking it through) you find you got all the right tools for solving it.Rusty, That is such an accomplishment. And I so appreciate the talent. Perhaps what I love about the trucks the most is the ways I get involved with doing different kinds of work, and utilizing my creativity and my cherished tool collection.
rustystud, you are "Da Man".I worked at a "machine shop" at that time so I had a buddy turn the threads on his lathe. Then I heated and bent the bolts. Stainless Steel is real tricky to bend, but at "Kolstrand Marine" we where one of the main suppliers for the Northwest fishing fleet out of Seattle. We sold tons of Stainless Steel products. Literally ! So we had special tricks on bending Stainless Steel. I was pretty good at it too. I ended up being the only one bending Stainless Steel at Kolstrand for years. I even developed the Stainless Steel "Halibut Hook" . They needed to be able to hold a bend with a 500 Ibs Halibut on the end of it. I used to demonstrate this by taking a three foot Hook and ramming it in one of the overhead beams and doing a pull-up on it. With only 1/2" or less of the hook in the beam it still held my weight which was 200 Ibs at that time. The fishermen loved it ! The hooks would now last for years instead of just one season.
Of course now I had to make over 3,000 stainless steel hooks each season besides the 4,000 regular steel hooks ! One order alone was over 1,000 hooks !
Speaking of my cherished tool collection, here an old favorite...Notice that theres a pipe die in the handle of this DOGWRENCH. Yes, thats what they called it.
That is a beauty, whatadeuce! That's a real gem.Speaking of my cherished tool collection, here's an old favorite...Notice that theres a pipe die in the handle of this DOGWRENCH. Yes, thats what they called it.
Hey jeffhuey, how about some pictures?
Speaking of pics, remember now Mr. Aussie Bloke, you promised us at least one vid.G'day everyone,....
Just need to give it a clean and I am ready to go to Cruiserkhana.
Expect Video etc ,.....
Aussie.
saw a slimy green coating inside the strainer on both sides of the mesh. It wouldn't wash off with water or a can of carb cleaner, nor scrape off either. After removing it from the fuel tank cap & letting it sit in the air for 6 days, the green stuff turned solid & would scrape off with a rounded edge piece of thin metal.
Yup. That's algae.After removing & dumping the fuel out of the strainer & filling the tank; I saw a slimy green coating inside the strainer on both sides of the mesh. After removing it from the fuel tank cap & letting it sit in the air for 6 days, the green stuff turned solid & would scrape off with a rounded edge piece of thin metal.
There is nothing like actually trying a system to check out how it's going to work.Well I used my homemade tow bar today. Got the load to where it was supposed to go. Here is a report on how the tow bar faired: I noticed when towing that when I had to stop I braked too early and my tow bar banged into the front bumper , and bent it. I was surprised! But what surprised me more is that the 3/8" Gr. 8 bolt I used to center the tow chain was also bent ! Now the tow was only 2 miles, but I have lost a measure of confidence in this system !