7x7 and 7x19 are two of the most common aircraft cable constructions used in aircraft controls. However, their functionality is not limited just to the aerospace industry, as these flexible cables are useful for a wide range of other mechanical applications. Available from stock in stainless steel and galvanized steel, these versatile products offer an effective balance of strength and flexibility. Take a brief moment to learn all about the characteristics of their individual constructions.
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Wire Count & Performance
7x7 aircraft cable is made from 7 strands that each contain 7 wires, for a total of 49 wires. A 7x19 aircraft cable is made from 7 strands that each include 19 wires, for a total of 133 wires. This means a 7x19 construction consists of over 2.5 times the total number of wires as a 7x7. The difference in wire count imparts different properties to the finished cable. Why is this important?
In general, the more wires a cable has, the smaller the individual wires within the same diameter. This is important because the size of the wire affects the life of the wire. Smaller wires can abrade faster when subjected to friction*. Corrosion can impact smaller wires faster, leading to earlier failures in a similar environment. Given this, It is important to understand the particulars of your application before selecting a certain aircraft cable construction, as each style provides its own unique benefits and features.
Flexibility and Versatility
Different wire counts, and the corresponding wire sizes, also provide different flexibility characteristics within the same finished cable diameter. 7x7 and 7x19 cables are both relatively flexible, especially when compared to products such as 1x7 strand. Their higher wire counts allow them to bend more easily, which also makes them a more effective choice for pulley systems than strand. However, there are still additional flexibility performance differences between 7x7 and 7x19 constructions that are worth discerning before purchase. In general, the higher wire count of a 7x19 typically makes it a better choice for winches, garage doors, and other applications that require tighter and more frequent turns, while the rigidity of a 7x7 makes it a good choice for automotive and aircraft controls. Consider using a 7x19 construction when fatigue is a primary concern, and a 7x7 construction when extreme flexibility is not required.
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Do You Need a 3 Phase Solar Inverter?*Keep in mind that some of the concerns noted above can be mitigated through selecting lubricated cables, such as out military specification cables, to help reduce the friction created during the normal workings of an aircraft cable.
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One of the most common questions we get asked is the difference between 7x19 and 7x7 wire cables. This question is frequently asked because these two types of cables are the most common cable constructions for many industries, including aircraft controls. Because of the number of mechanical applications that both cables boast, it is essential to recognize the difference between the two for your application. Even though both wire ropes are reliable and robust, they should not be used interchangeably. Using the correct gear is essential for safe operations. If you still have more questions about 7x7 and 7x19 wire ropes by the end of this article, you should not hesitate to reach out for more assistance.
The numbers in the names of these wires represent the number of strands and wires each rope contains. A 7X7 cable is built from 7 strands, and each strand has 7 wires (49 wires in total). The 7x19 variant includes 7 strands with 19 wires, giving the rope 133 wires. When you do the math, a 7x19 cable has over 2.5 times the number of wires in a 7x7 construction.
Wire counts directly represent the versatility and flexibility offered by the individual rope. Both are relatively flexible (especially when compared to 1x7 wire ropes). When compared to ropes with a lower wire count, higher count wire ropes allow for easy bending, which makes them ideal for operations that contain pulley systems. The difference between flexibility ratings for 7x7 and 7x19 is more complex than a simple wire count. 7x19 wire ropes are typically the intelligent choice for garage doors, winches, and any other application that requires frequent and tight turns. 7x7 ropes are rigid, which makes them an excellent choice for aircraft and automotive controls. If fatigue is one of your significant concerns, a 7x19 wire rope is an intelligent choice. Use 7x7 ropes when you do not need high levels of flexibility
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