Custom Strain Clamp

Strain  clamp, often referred to as a dead-end clamp or anchor clamp, is an essential component used in the electric power distribution industry. It’s specifically designed to anchor and securely hold conductors or wires, thereby maintaining the necessary tension in overhead power lines, preventing sagging, and ensuring uninterrupted power distribution.

General Applications For Strain Clamp

Crossarms are essential in various scenarios: aiding in quick restoration of power lines after storms, providing sturdy support for overhead power distribution in residential areas and telecommunication lines, extending the reach of electricity to remote rural locations, maintaining the robustness of urban power grids for consistent energy supply, and securing overhead highway lighting systems, thereby enhancing road safety and visibility

General Hot Selling Products

Aluminum Alloy Strain Clamp


Aluminum alloy strain clamps are primarily made from high-strength aluminum alloys. This material offers good mechanical strength, excellent conductivity, and corrosion resistance, making it suitable for overhead line applications.


The main function of an aluminum alloy strain clamp is to hold and anchor conductors in an overhead power line system. These clamps bear the tension of the conductor and provide a secure grip without causing any damage to the conductor itself. By doing this, they ensure that the conductor remains taut and does not sag excessively, ensuring safety and functionality of the power transmission system.


  1. Installation: While installing an aluminum alloy strain clamp, care should be taken to select the right size of the clamp suitable for the diameter and type of the conductor. Typically, the conductor is inserted into the clamp and the clamp is then bolted or wedged securely, ensuring that the conductor is held firmly.

  2. Selection: The choice of strain clamp often depends on the type and size of the conductor, the amount of tension to be borne by the conductor, and environmental conditions where it is being used.

  3. Maintenance: Regular inspections are crucial to ensure that the clamp maintains its grip on the conductor and is free from corrosion or any signs of wear.


Bolt NLD Type Starin Clamp

The bolted type strain clamp, sometimes referred to as the “bolted dead-end”, is engineered to anchor and support overhead conductors or ground wires against the mechanical tension generated from angles, elevation changes, or endpoints in overhead power lines. In essence, this clamp secures the conductor in place, preventing it from sagging or moving laterally, thus ensuring the integrity and stability of the power line.

Material & Construction:
These clamps are primarily constructed from robust, corrosion-resistant materials such as high-strength galvanized steel. The design of a bolted type strain clamp generally includes multiple sections that encapsulate the conductor when bolted together. These sections often have grooved or serrated inner surfaces to enhance the grip on the conductor.

Robust Design: Crafted to bear the mechanical tension of conductors, especially in areas prone to adverse weather conditions like strong winds or ice.
Ease of Installation: Its design facilitates straightforward installations without the need for specialized equipment.
Optimized Gripping: The internal serrations ensure a secure grip, reducing the chances of slippage.
Adjustability: The bolted mechanism permits adjustments, ensuring compatibility with a variety of conductor sizes.
The bolted type strain clamps are crucial in power transmission and distribution infrastructure:

Transmission Lines: Used primarily to anchor conductors at points of directional change, or at terminal endpoints.
Distribution Systems: Essential in anchoring conductors to support structures like poles.
Dead-ending: These clamps provide a secure termination point for overhead conductors.
Elevation or Angle Support: Whenever power lines navigate angular turns, elevations, or even crossings, these clamps ensure the conductors maintain their position and tension.
Durability: With top-notch materials, the clamps are designed for longevity, even in challenging environments.
Consistency & Reliability: Once installed, their grip on the conductor remains steadfast, ensuring consistent tension distribution.
Versatile Applications: They’re adaptable and suitable for a wide range of conductors and wire types.
In closing, the bolted type strain clamp is a paramount tool in the realm of electrical power transmission and distribution. Its role, although often unnoticed by the general public, is instrumental in maintaining the safety and reliability of the power systems that light up our homes, businesses, and cities.

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The Common Pitfalls When Purchasing

Absolutely! When purchasing tension clamps for power lines or any other application, there are a number of potential pitfalls that buyers should be aware of to ensure that they are buying the best product for their requirements. Here are some common pitfalls:

  • Material Quality: Not all tension clamps are made from materials that can withstand long-term exposure to the environment. Poor quality materials can corrode or degrade, leading to loss of grip and potential system failure.
  • Improper sizing: One of the most common mistakes is purchasing clamps that do not match the size and type of conductor being used. This can lead to a poor fit, which reduces efficiency and poses a potential safety hazard.
  • Underloading: Underestimating the mechanical load that a tension clamp needs to carry can lead to premature failure. Always ensure that tension clamps are rated for a load greater than or equal to the intended load.
  • Lack of Adjustability: Some tension clamps have limited adjustability. This may make them unsuitable for applications involving different tensions or conductor sizes.
  • Inadequate Documentation: Not having a clear set of installation guidelines, specifications or certifications can make installation and future maintenance difficult.
  • Ignoring local climate: Different regions have different challenges – from salty air in coastal areas to heavy ice loads in cold climates. Purchasing generic clamps without considering local environmental factors can lead to premature wear.
  • Neglecting Future Maintenance: Inspecting, adjusting or replacing clamps can be more challenging if future maintenance needs are not considered at the time of purchase.
  • Lack of corrosion protection: Especially important for equipment installed in harsh environments, always ensure that the clamp material is properly treated or coated to prevent corrosion.

In conclusion, due diligence is critical when purchasing tension clamps.





















A Brief Self-Nomination​, Why Choosese Dapeng power?

In today’s interconnected world, where traditional business methods are giving way to online transactions, the availability of power line fittings manufacturers is just a few clicks away. But what sets us apart in this crowded digital market? Our understanding goes beyond merely providing power line fittings. We aim to be a reliable, proficient, experienced, and approachable Chinese partner, dedicated to fueling your business growth and navigating new markets. Our commitment to excellent customer service remains unmatched. Trust us with your requirements, and we pledge to exceed your expectations, guarantee your satisfaction, and earn positive reviews. Let’s forge a successful partnership and strive together towards a robust and reliable power infrastructure.

  1. Complete production equipment to meet the production needs of different products.
  2. Excellent team of engineers
  3. 15 years of experience in the power line hardware industry
  4. Exporting to multiple countries is very clear about the special requirements for each country’s products.

Each product must complete two steps of testing before leaving the factory, the first tensile strength test, the second zinc layer thickness test, to ensure that each product is 100% qualified.

The Basic Knowledge About Strain Clamp

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A stay rod is designed in two primary forms: bow stay rod and tubular stay rod. Each type has its unique components and applications, ensuring that electrical poles and overhead lines remain stable and securely anchored to the ground.

The FAQs About Strain Clamp/Tension Clamp

A strain clamp, often referred to as a tension clamp or dead-end clamp, is a specialized hardware device employed in overhead power line systems. Its primary purpose is to anchor and support electrical conductors and cables against the mechanical tension arising from their extended spans, environmental forces, or directional changes. Constructed from robust materials like aluminum alloy or galvanized steel, strain clamps are meticulously designed to withstand various stresses, such as those imposed by strong winds, ice accumulation, or terrain undulations. Many feature serrated or grooved interiors to enhance grip on conductors. They play a pivotal role in ensuring the stability and safety of power transmission, particularly at terminal points, elevation changes, and angular deviations in line routing. Without strain clamps, conductors would be prone to sagging or misalignment, jeopardizing the integrity of the entire power distribution system.


  1. Selection:

    • Choose the appropriate strain clamp based on the type, size, and material of the conductor. Ensure the clamp is designed to handle the expected mechanical load.
  2. Preparation:

    • Turn off the power to ensure safety during installation.
    • Clean the conductor's surface where the clamp will be attached to ensure proper contact.
  3. Positioning:

    • Place the conductor into the groove or slot of the strain clamp. Depending on the design, this might be a U-shaped groove, a wedged opening, or a multi-part assembly.
  4. Securing:

    • For bolted type clamps: Align the two halves (or multiple parts) of the clamp around the conductor and tighten the bolts uniformly. Ensure even pressure and avoid over-tightening, which might damage the conductor.
    • For compression type clamps: Use a suitable compression tool to crimp the clamp onto the conductor. Make sure it's evenly compressed throughout.
    • For wedge type clamps: Slide the conductor into the open end until it's firmly seated. As tension is applied, the wedge mechanism will grip the conductor securely.
  5. Anchoring:

    • Once the clamp is secured to the conductor, attach the other end of the clamp to the support structure, such as a pole, tower, or cross-arm, using the designated anchor mechanism, which could be a bolted connection, a shackle, or other means.
  6. Inspection:

    • After installation, inspect the clamp to ensure it is securely holding the conductor and is anchored firmly to the support structure. Check for even pressure distribution and make sure there are no signs of damage to the conductor.
  7. Maintenance:

    • Regularly inspect strain clamps, especially after extreme weather conditions, to ensure they remain in good condition and maintain a firm grip on the conductor. Tighten or adjust as necessary.
  8. Safety Precautions:

    • Always use appropriate personal protective equipment (PPE) during installation, such as gloves, safety glasses, and insulated tools.
    • Ensure the power is turned off when working on electrical lines to avoid electrocution.
    • Follow all standard safety protocols and manufacturer’s recommendations during the installation process.

In conclusion, while the process to use a strain clamp may seem straightforward, always ensure that you follow safety guidelines and manufacturer recommendations to achieve a safe and effective installation.

  1. Suspension Clamps:

    • Purpose: These are used to suspend conductors or insulators to the tower.
    • Design: They are designed to hold the conductor without causing any damage while allowing it to move horizontally. This movement is essential to accommodate the expansion and contraction of the conductor due to temperature variations.
    • Material: Typically made of malleable iron or aluminum alloy to ensure strength and resistance to environmental conditions.
  2. Strain (or Tension) Clamps:

    • Purpose: These clamps are used at terminal poles, corners, and sharp curves where the tension on conductors is high.
    • Design: They are designed to handle high tension without causing damage to the conductor. They typically have a grooved structure to ensure firm gripping.
    • Material: Made of forged steel or malleable iron, these clamps can endure high levels of strain.
  3. Dead-end Clamps:

    • Purpose: Used to terminate conductors at the end of a line.
    • Design: Built to handle the full tension of the conductor and ensure there's no slippage.
    • Material: They are often made of high-strength materials like forged steel.
  4. Spacer Clamps:

    • Purpose: In bundled conductors, spacer clamps maintain the gap between the conductors. This is essential to reduce oscillation and ensure that conductors don't clash during high winds.
    • Design: Can be of rigid or flexible type.
    • Material: Typically made of high-strength aluminum alloys.
  5. Anchor Clamps:

    • Purpose: Used mainly in distribution lines to anchor conductors to poles, especially at the end of spans.
    • Design: They grip the conductor securely to transfer the mechanical load to the pole.
    • Material: Often made from weather-resistant materials, such as aluminum alloy or galvanized steel.
  6. Tap Clamps:

    • Purpose: Used for making tap connections from the main line.
    • Design: They ensure a reliable electrical connection and can handle the current without overheating.
    • Material: Typically made of copper or aluminum, depending on the conductor material.
  7. Repair Clamps:

    • Purpose: Utilized for repairing damaged sections of conductors without interrupting the power flow.
    • Design: They encircle and grip the damaged section, ensuring a seamless transition of electrical current.
    • Material: They're made of materials compatible with the conductor to ensure proper electrical and mechanical connection.

These are just some of the primary clamps used in transmission systems. The selection of a particular clamp depends on factors like the line's voltage level, conductor type, environmental conditions, and specific requirements of the transmission system. Proper clamp selection and installation are crucial for the reliability and safety of the transmission line.

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The ULTIMATE Guide to Surcing overhead line fittings in China 2023

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