Guidelines for buying U-bolts
The bolts can be manufactured with customized U-shaped bolts made of steel with 1/2 inch diameter and larger. Therefore, as long as the diameter of the U-bolt you need is 1/2 inch or more, we can manufacture them within the limits of the capabilities of the bending equipment and the steel itself. In order to better understand what can be manufactured, you will need to have an understanding of the way we manufacture U-bolts.
Square vs round bent U-bolt
Round bend U-shaped bolt
There are two types of U-shaped bolts, namely round bent U-shaped bolts and square bent U-shaped bolts. The shape of the round-bent U-shaped bolt is similar to the letter "U", and is usually used to fix something on a round rod or pipe. To make a round elbow U-shaped bolt, we first cut a section of steel round bar to an appropriate length, and then bend that piece of steel around a pin with the same diameter as the final U-bolt. For example, if you need a round U-bolt that can be mounted on a 3 inch diameter rod, we can bend it on a 3 inch diameter pin. You can see a short video about this operation below:
Square curved U-bolt
Another type of U-bolt is a square-curved U-bolt. Applications may vary, but this type of U-bolt usually surrounds a generally square or rectangular shape, such as a square wooden beam or square steel tube. Making this type of u-bolt is more complicated and requires some other considerations. Before we start manufacturing this type of U-bolt, we need to know some other information. Since the U-bolt will be made of round reinforcement and will bend around the round pin, the elbow itself will have a round profile. In many architectural applications, this is not a problem. However, in certain precision applications, such as the use of certain cars or trailers, U-bolts may be required to have true, sharp, right angles in the elbow. In this case, we may not be able to manufacture the required U-bolts.
Square vs round bent U-bolt
Determine bending radius
Once you have determined that radius bending is acceptable for your application, the next thing you must consider is the relationship between the diameter of the U-bolt and the bending radius. For square bent U-bolts, the general rule of thumb is that the bending radius must be at least twice the diameter of the material being bent. For example, if the U-bolt of a square elbow is made of 1/2 inch material, the radius of each elbow must be at least 1 inch. In some cases, sharper bending can be performed through hot bending operations, which requires additional labor.
Another aspect of U-bolt manufacturing that must be considered is that the amount of thread on each leg is related to the length of these legs. The thread length will depend on the diameter of the material, the type of steel used (low carbon steel or high strength steel) and the function of the bending radius. Generally speaking, U-shaped bolts are divided into two categories here:
U-bolts made of mild steel with a diameter of 1 inch or less
The U-bolt is made of low-carbon steel with a diameter of 1-1 / 8 inches and above, or high-strength steel of any diameter.
For Group 1, the general rule is that the thread should not be started until the bending radius is at least 1 inch. In the case of group 2, the rule is that the thread should not be started until at least 1 inch above the bending angle (the radius is twice the radius). The reason for these limitations is that, during the manufacturing process, the threads extending further along the u-shaped bolt feet can invade the steel area being bent and then be crushed by the bending roller. Remember, the distance of 1 inch beyond the radius or diameter is the smallest. The farther the better.
U-bolt thread clearance
The last item that may sometimes be considered is the ASTM specification for manufacturing your U-bolts. If your U-bolts are made of hardened and tempered high-strength steel, you may have to heat the material before bending to obtain the desired shape. In this case, the material must be sent to a metal heat treatment company for heat treatment to restore the high-strength properties of some of the steel that was heated during the manufacturing process. This will increase the time and cost of order production.