Sep. 08, 2025
There are a couple of cycles that are followed with respect to manufacturing U-bolts.
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Using u bolt bowing machine, the steel is then cold molded into the genuine shape. This is frequently basically where the steel is formed, while at temperature, by convincing it through a movement of pressurized dies.
The tooling itself is much of the time quite marvelous, containing up to 200 particular parts with flexibilities of hundredths of a millimeter. At the point when consummated, cold manufacturing ensures bolts are frequently produced quickly, in huge volumes, and with high uniformity.
For more staggering u-bolt designs, which can’t be contoured through crisp molding alone, some additional turning or infiltrating could in like manner be fundamental.
The turning framework includes turning the bolt at quick, while steel is cut away to understand the predefined shape and style. Exhausting is ordinarily wont to make openings through the bolt. Whenever required, a couple of bolts can similarly have washers joined at this period of the technique.
Heat treatment may be a standard cycle for all bolts, which includes introducing the bolt to outrageous temperatures to cement the steel.
Hanging is regularly applied before heat treatment, either by rolling or cutting, when the steel is milder. Moving works in much the same manner to cold producing and includes running the bolt through a fail miserably to shape and frame the steel into strings. Cutting the u-bolt includes molding strings by cutting and disposing of steel bits.
Since heat treatment is planned to change the properties of the steel to shape it harder, it’s more direct and more reasonable to use hanging ahead of time. Regardless, hanging after heat treatment will clearly result in better fatigue execution.
Cold forging of the U-bolt starts with large steel wire rods, which are uncoiled and have different dimensions. The grade of steel for u-bolt manufacturing is standardized across the globe, consistent with the requirements of ISO 898‑1.
On top of those typical focus parts, U-bolt manufacturers can add cautious coatings. These consummations safeguard against disintegration extensively more. The following are a couple of typical coatings or surface prescriptions for U-bolts:
Zinc plating includes adding zinc using a layer of force. Usually a more thin layer turns out better for indoor applications.
The Hot-dip galvanization technique in like manner includes adding zinc, but it’s more complicated covering. U-Bolt manufacturers dunk the bolt in liquid zinc to make a bond, which makes the covering proper for destructive circumstances like locales with high humidity or salt inside the air.
Fluoropolymer (Xylan, Teflon, or PTFE) Coating for u-bolts
A fluoropolymer covering may be a mixture of parts that are immune to disintegration. The covering can delay in outrageous hot and cold temperatures without breaking.
The essential advantage of adding a thermoplastic covering to U-bolts is that the extra buffer between metals. Metal-on-metal contact can cause galvanic disintegration and result in broken structures of the metal. A thermoplastic covering is used for adding a protective neutral layer between the line and as such the constraint.
The choice of U-bolt surface treatment is picked by the U-bolt’s application. Thusly the requirements of the customer. Frequently, the most concern for locks is consumption obstruction, and thus a zinc-plated covering applied through electrolytic treatment may be an ordinary solution.
With regards to deciding the u-bolts aspects, there are a wide range of approaches to accomplishing this objective. This step is quite crucial because the bolts should be of the right size for whichever application that you will put them to.
There is no question that the spans of u-bots will generally differ. There are enormous u-bolts while simultaneously there are little u-bolts. U-bolts will generally be coordinated with the components of the lines they’re intended to secure. Bolts can run somewhere in the range of 1/4 of an in. to a full inch in pole size. furthermore, that they can hold channeling as wide as 30 inches.
Whichever application, here are the key factors that you should consider while buying U-bolts accessible to be purchased:
Their purpose/application: The most essential occupation of U-bolts is to supply a catching ability to convey two sections together.
U-bolt perspectives: U-bolts are measured supported the string length, inside expansiveness, inside level, and string size. U-bolts were at first measured using pipe add planning to talk. Subsequently, a U-bolt would at first be depicted by the line’s size that it had been supporting.
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U-bolts cost: Like various things, you can’t avoid the issue of cost. U-bolts are humble. Custom valuing is usually coordinated by quantity and quality. Contact the U-bolt manufacturer for clarification about the expense.
Solace: How helpful is it to use U-bolts? Generally, this alludes to the straightforwardness of using this equipment. Not exclusively are U-bolts tough and successful but also they’re open in various sorts of material. They also come in various strength grades to supply adequate fastening force. We can’t neglect how U-bolts they’re also very easy to work and they are versatile enough that they will apply to fluctuated applications and industries. Similarly, is that there is zero material waste when it includes using U-bolts.
Actual definition: Several parts portray the U-bolt: material sort, bar expansiveness, inside measurement (between the legs), inside length, and string angles.
U-Bolt Finish: U-bolts in like manner can are available explicit fruitions to look into better to the circumstances they’re supposed to function in. For example, for a U-bolt that is becoming used in humid or destructive circumstances, a disintegration safe material like sort 316 tempered steel or steel with a hot-plunged mixed finish should get on the plan.
-Eliminate the two nuts from all sides of the U-bolt
-Place the U-bolt around the line you’re connecting and string the bolt’s closures through the openings in your support pillar or structure.
-String every one of the nuts on each outer finish of the bolt.
-Hand-fix the nuts that are nearest to the support shaft.
-Fix the outer nuts on each finish of the U-bolt and use an influence instrument or torque to fix the nuts.
On the off chance that you’re using the U-bolt as a guide, affirm with the dispersing to suit its particulars prior to fixing nuts.
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Portland Bolt can manufacture custom u-bolts that are made from 1/2” diameter and larger steel. So as long as the u-bolts you need are 1/2” in diameter or larger, we can most likely manufacture them, within the capabilities of our bending equipment and the limitations of the steel itself. To better understand what can be manufactured you will need to know a little about the way that we manufacture u-bolts.
There are two types of u-bolts, round bend u-bolts and square bend u-bolts. Round bend u-bolts are shaped like the letter “U” and are typically used to attach something to a round pole or a pipe. To manufacture a round bend u-bolt, we first cut a section of steel round bar to the appropriate length and then bend that piece of steel around a pin that has the same diameter as what is desired in the final u-bolt. For example, if you need a round bend u-bolt that will fit around a 3” diameter pole, we would bend it around a 3” diameter pin. You can see a brief video of this operation below:
The other type of u-bolt is a square bend u-bolt. Applications can vary, but this style of u-bolt is usually going around something generally square or rectangular in shape, such as a square wooden beam or square steel tubing. Fabricating this style of u-bolt is more complicated and requires some additional considerations. Before we can begin manufacturing this style of u-bolt we will need to know some additional information. Because the u-bolt will be manufactured from steel bars that are round in shape, and will be bent around a round pin, the bends themselves will have a rounded profile. In many construction applications this is not a problem. In some precision applications, however, such as in some automotive or trailer uses, the u-bolt may be required to have a true, sharp, right angle inside the bend. In cases like these, we would most likely not be able to manufacture the u-bolt required.
Once you have determined that bends with a radius will be acceptable for your application, the next thing that must be considered is the relationship between the diameter of the u-bolt and the radius of the bend. For a square bend u-bolt the general rule of thumb is that the radius of the bend must be at least twice the diameter of the material being bent. For example, in the case of a square bend u-bolt being made from 1/2” material, the radius of each bend must be at least 1”. In some cases, sharper bends can be performed through a hot bending operation which involves additional labor.
Another aspect of u-bolt manufacturing that must be considered is the amount of thread on each leg in relation to the length of those legs. The thread length will be a function of the diameter of the material, the type of steel being used (mild steel or high strength), and the radius of the bend. Generally speaking, u-bolts fall into two categories here:
In the case of group 1 the general rule is that the threads should not begin until you are at least one inch beyond the radius of the bend. In the case of group 2, the rule is that the threads should not begin until you are at least 1″ beyond the diameter (twice the radius) of the bend. The reason for these restrictions is because threads extending further down the leg of the u-bolt will encroach into the area of the steel being bent during fabrication, and will subsequently be smashed flat by the bending rollers. Bear in mind that the 1″ distance beyond the radius or diameter is the minimum. More distance is always preferable.
A final item that may sometimes be a factor to consider is the ASTM specification to which the u-bolts you need are being manufactured. If your u-bolts are being manufactured from a quenched and tempered, high-strength steel there is a possibility that the material may have to be heated before bending to achieve the desired shape. In cases like this, the material will have to be sent to a metal heat treating company to undergo a heat treating process to restore the high strength properties in the portion of steel that was heated during fabrication. This will add additional time and cost to the production of your order.
Keep in mind that the information in this FAQ is intended to serve as a guide to help you better understand the types of u-bolts that we can best help you out with. As with any guidelines, there will always be special cases and exceptions to the rules. If you are uncertain about whether Portland Bolt can help you out with your u-bolt requirements, please contact one of our experienced sales team members and we will be glad to help walk you through it!
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