![]() In this example, the ONLY weight these clips ever hold is the weight of the wheel, not the weight of the personnel or materials. Without this clip, if you pick up the scaffolding, the wheels would fall off, which is very aggravating. A shoulder on the wheels supports the weight of the scaffolding, and these clips are run through aligned holes in the leg/ wheel to prevent the wheel from falling off. The wheels have the male tubing which slides into the female tubing leg. I can say that they are designed to retain tubing pieces under minimal strain.įor example, holding the wheels on rolling scaffolding. ![]() I can't say how it is used in problemaddict's case. Most of those pins are listed as having a certain tensile or shear strength. provided the pin is the proper size for the hole, and the insert is the proper size for the receiver, all should be well. In that situation, the softer bolts migh prove problematic since they might abrade and get smooshed under those kind of loads. A hard grade 8 bolt would usually suffice since the close shear tolerance prevents the fastener from deflecting. If you have a hitch insert, the shear loads placed on the fastener are very localized. which brings me to my next confusing part. Applications like hitches are a different story. In applications like rod and main bolts, the higher the better. I won't talk about the brand new polished aluminum oil pan or $400 radiator that bit the dust in the process.įor instance, when you see engine fasteners from companies like ARP, they often list their tensile strength. It didn't bend a bit before shearing off flush with the head. I had a grade 8 bolt threaded in the whole way into a head. I used to use grade 8 bolts through a chain link to hoist engines until I lost one. They are best used in applications where their entire load is tension. Grade 8 bolts are very high tensile strength. They will bend a decent amount before breaking. Grade 5 bolts add a significant amount of tensile strength but can still take side loads with composure. The soft steel will either strip the threads or literally pull the fastener apart. The one thing they don't do well is high tensile forces. Grade 2 (normal cheap stuff) you can bend a few times and still have a viable bolt for holding a picture on your wall. Grades of bolts basically indicate their hardness and therefore tensile strength. Those pins are debatably fine for towing, if they are the right strength. ![]() a wee bit of fastener ettiquette might help.
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