Your professional power fittings supplier
Our goal is to become your true partner in the field of aluminum alloy power fittings in China. Guangdong Jinkai Power Fittings Co., Ltd., established in 2013 and headquartered in Tangxia Town, Dongguan City, Guangdong Province, is a comprehensive enterprise integrating power fitting manufacturing, plastic product production, mold research and development, and metal processing.
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![Stockbridge Style Dampers]()
Stockbridge Style DampersScope of Application: 10 kV to 1,000 kV overhead transmission and distribution lines, substation busbars, and optical cables (ADSS/OPGW). Designed to suppress vibrations caused by light winds and -
![Stockbridge Dampers For ADSS]()
Stockbridge Dampers For ADSSSuitable conductors: Compatible with aluminum stranded wire (LJ), steel-core aluminum stranded wire (LGJ), and copper stranded wire (TJ), with conductor diameters ranging from 7.0 to 36.0 mm -
![Overhead Conductor Damper]()
Overhead Conductor DamperThe FR overhead conductor damper is a critical protective fitting used in overhead power lines to suppress aeolian vibration of the conductors.Scope of Application: 10 kV to 1000 kV overhead -
![Stock Bridge Dampers]()
Stock Bridge DampersMaterial: Hammer head: HT150 gray cast iron (U-shaped structure for wear resistance); Line clamp: ZL102 aluminum alloy (330 kV and above) / steel (220 kV and below); Stranded wire: YB/T 4165 hot-dip
Why Choose Us
Our Strengths.
Our Company
Established in 2013, Guangdong Jinkaite Power Fittings Co., Ltd. specializes in the R&D and manufacturing of power distribution fittings and related components, and operates a 19,000 m² facility with in-house R&D, full-process mold development, and integrated manufacturing.
Our Services
We provide professional sales and after-sales services. Our professional service team responds swiftly to pre-sales, sales, and after-sales needs, providing one-stop full-process services from procurement to on-site production and delivery, truly bringing service to your doorstep. We also offer more service support for website buyers.
Our Certificates
Certified to ISO 9001, ISO 14001, and OHSAS 18001, compliant with CE & RoHS, supported by multiple national patents, and recognized as a High-Tech and Specialized & Innovative Enterprise.
Our Market
Serving key domestic markets and 50+ countries worldwide, trusted by top utilities and global brands, and actively present at leading international power industry exhibitions.
The asymmetrical design (with unequal hammer head weights and steel strand lengths at both ends) features four resonance frequencies, covering the common vibration frequency range of conductors (3–150 Hz). Its vibration damping performance far exceeds that of traditional FD-type clamps (which have only two frequencies).
The hammer features a tuning-fork-style open structure with no enclosed cavities, preventing water accumulation and ice formation, ensuring greater stability in extremely cold and humid environments.
Line clamps are made of aluminum alloy (330 kV and above) or hot-dip galvanized steel (220 kV and below), with smooth surfaces to reduce the risk of corona discharge.
The hammer head and steel strand are hot-dip galvanized, providing resistance to atmospheric corrosion and a service life of ≥10 years.
The U-shaped design of the hammer head prevents contact and abrasion with the steel strand at high frequencies.
The clamp offers strong gripping force; when paired with rubber pads, it prevents conductor damage and slippage.
Lightweight (2.6–7.6 kg), easy to install, and compatible with various types of towers.
Compatible with steel-core aluminum stranded wire, aluminum stranded wire, copper stranded wire, and ground wires. Covers voltages from 10 kV to 500 kV; essential for lines with spans ≥120 m.
Application Scenarios
High-voltage overhead transmission lines: 110kV/220kV/330kV/500kV; straight and tension sections with spans >120m; must be installed on both sides of suspension clamps and tension clamps.Long-span / wind-prone / mountainous lines: In areas with severe wind vibration, prioritize the FR-type wide-frequency vibration damping clamp.
Arctic, coastal, and high-humidity regions: Replace FD-type dampers to address issues such as water accumulation and freezing, corona discharge, and corrosion.
Ground wires / OPGW optical cables: Synchronized vibration damping to ensure the safety of both communication and power transmission.
Products Description
| Model | Applicable Wire Diameter (mm) | Overall Length L (mm) | L1(mm) | L2(mm) | Center Height h (mm) | Clamp Length a (mm) | Approximate Weight (kg) |
| FR-1 | 7–12 | 429 | 239 | 190 | 80 | 50 | 2.6 |
| FR-2 | 11–22 | 429 | 239 | 190 | 80 | 50 | 2.6 |
| FR-3 | 18–28 | 505 | 280 | 225 | 90 | 60 | 4.97 |
| FR-4 | 23–36 | 550 | 320 | 250 | 100 | 70 | 7.6 |
| Lead Time | ||
| Quantity (pieces) | 1 - 1000 | > 1000 |
| Lead time (days) | 15 | To be negotiated |
Packaging and Shipping
Packaging
1. Standard packaging: inner bag + cardboard box
2. Custom packaging is available upon request.
Shipping
You may specify alternative shipping methods, such as airmail, FedEx, or DHL. We will inform you of the shipping costs upon receipt of your order. It is recommended that you provide your own FedEx/DHL account number so that shipping charges can be charged directly to your account. We also offer sea or air freight; please specify your port of destination.
FAQ
Q: What type of vibration is the FR anti-vibration hammer primarily designed to suppress?
A: It is primarily used to suppress light wind vibrations and inter-span vibrations in overhead power lines, thereby preventing conductor strand fatigue failure and damage to hardware.
Q: What conductor cross-sections are compatible with the FR anti-vibration hammer?
A: It is typically compatible with conductors ranging from 10 to 400 mm², covering all models from FR-1 to FR-6. Custom solutions are available for conductors with special cross-sections.
Q: Are special tools required to install the FR anti-vibration hammer?
A: No, installation can be completed with a standard wrench. It is easy to operate, suitable for high-altitude work scenarios, and can significantly improve construction efficiency.
Q: What is the vibration suppression efficiency of the FR anti-vibration hammer?
A: Vibration suppression efficiency for light winds is ≥85%, and for moderate winds is ≥75%, meeting industry standard requirements.
Q: How can corrosion be prevented when using the FR anti-vibration hammer in coastal areas?
A: Corrosion-resistant FR anti-vibration hammers are available. The hammer body is made of stainless steel or undergoes dual anti-corrosion treatment, effectively resisting salt spray corrosion and making it suitable for coastal environments.
As one of the most professional protective fittings manufacturers and suppliers in China, we're featured by quality products and good price. Welcome to buy high-grade protective fittings made in China here from our factory. If you have any enquiry about quotation, please feel free to email us.
