Cable Gland System for Cable Strain Relief and Waterproof Clamping Figure
cable glands provide a way to properly manage the cables used to connect industrial, automotive, marine, electronic and other applications to their appropriate power source. One of the main parts of a cable gland system is theclamping finger. A clamping finger provides an effective means of providing strain relief from applied loads on the cable due to motion or environmental forces. In addition, the clamping finger provides a secure fit to the cable and creates a reliable seal to the outside environment, which protects the cables from dust and moisture.
cable gland Clamping Finger:The clamping finger is an internal component of a cable gland that provides a load-secured grip on the cable as well as strain relief from applied loads on the cable. The clamping finger also helps to maintain the integrity of the cable gland system due to its effective sealing performance; without the clamping finger providing this seal, the entire cable gland system would not be protected from dust, moisture and any other foreign substances that may enter the system.
Waterproof Clamping Finger:In applications where there is a potential for water to penetrate the cable gland system, thewaterproof clamping fingeris essential for keeping water out of the electrical and mechanical systems. In these applications, the waterproof clamping finger is usually used in conjunction with an industrial-grade cable gland that also serves to keep water, dirt and/or corrosive materials from penetrating the cable gland system. All industries requiring waterproofing, such as marine engineering, outdoor telecommunications & wastewater management, must be able to use it as a requirement.
Common Features That Will Help Guide You When Choosing The Right Clamp-Finger Strain Relief
There are some features you should evaluate about a Clamp Finger and how they will perform for you:
- Material Strength: Clamp Fingers made from high-grade engineered polymers (i.e. Nylon 66 or PA66) will last longer because of their superior wear resistance and ability to resist chemicals and environmental stresses.
- Flame Resistance: Many cables are used in high-risk environments; therefore, you want to use products that comply with the (UL) Standard UL94-V2, which will be flame resistant, thus providing you additional safety.
- Strain Relief: A strain relief ensures your cables stay supported when they are under mechanical stresses or an electrical component and will last longer.
- Grip Efficiency: A good gripping engagement will securely hold the cable in place and not slip due to diameter fluctuations.
- Customization: Some manufacturers will sell Clamp Fingers custom sized to match your application or project needs (for cable diameter).
Examples of Application for Clamp Finger Cable Glands
There are many different typesand applications for Clamp Finger cable glands; below are some of the most commonly used.
1. Electrical/Electronic: Commonly used in connector assemblies where they provide support for the connector, plus offer protection against environmental conditions such as vibration and variation in temperatures.
2. Automotive: Clamp Fingers provide excellent support for the cables used within an automotive wiring system. They help to ensure the support of wiring systems is maintained, regardless of how much motion, dirt, and temperature fluctuations occur.
3. Industrial Automation: Most of the time, for automated systems, you need tight cable management for successful operation. Clamping fingers protect against wear and tear on automated systems.
4. Outdoor Installations: Can protect an application, i.e., solar architecture, outdoor lighting, etc., from weather.
Key Versions of Clamping Fingers
Most universal clamping fingers will work. However, there are specific applications that would require clamping fingers with special configurations.
Universal Clamping Fingers: Universal clamping fingers fit many coffers and cable diameters and, therefore, are an affordable solution to the vast majority of standard configurations.
Replacement Clamping Fingers: Replacement versions of clamping fingers allow for a simple exchange of clamping fingers, thereby making the maintenance and/or upgrading of cable coffers much easier and without the necessity of disassembling the entire layout.
Custom-Sized Clamping Fingers: Utilized in specialized applications that require unique dimensions for that industry.
FAQ Regarding Clamping Fingers
What is a clamping finger in a cable gland?
The clamping finger inside a cable gland clamps the inserted cable, providing both strain relief and a watertight seal.
What is a material for the clamping fingers in the cable glands?
Most clamping fingers are manufactured of high-strength, specialty engineered polymers such as PA66, which have excellent durability, chemical resistance, and heat resistance.
What is the clamping finger's function within a cable gland?
The clamping finger's primary function is to provide both the grip for the cable and strain relief for the cable by preventing cable movement and damage and/or the ingress of the environment.
Are clamping fingers interchangeable with respect to cable gland size?
Not all clamping fingers are interchangeable. It is important to select the proper clamping finger size and type to the correct cable gland model to ensure the fit is adequate.
What is the importance of UL94-V2 as it pertains to clamping fingers?
The UL94-V2 flammability rating signifies that the plastic utilized in making the clamping fingers has flame retardant properties; therefore, it meets the requirements of safety when used in high-risk applications.
How to Choose the Right Clamping Finger
In making your selection of clamping fingers, there are several factors to consider:
1. Compatibility: Select clamping fingers that are compatible with both the dimensions of your cable gland and the cable diameter.
2. Materials: Select the best possible materials (for example, PA66) as the best guarantees of your clamping fingers’ durability and performance.
3. Certifications: Select products that are CE and/or UL94-V2 certified.
4. Application: Understand what your application requires, i.e., waterproof, flameproof, etc.
Once you have carefully selected the best clamping finger from the selection above, you are taking an important step in ensuring the reliability and longevity of your wiring system. By considering material selection, certification, and application requirements, you can achieve maximum performance and a job completed satisfactorily every time.
To conclude, the often humble but equally important clamping finger is one of the most important components in a cable gland system. The clamping finger performs a vital function with respect to strain relief, waterproofing, and flame retardant, thus making it an essential component for virtually any industrial application. If you choose clamping fingers that will provide the best possible performance, you are not only protecting your cables but your entire system's performance too!