Thimble clevises are interface fittings that attach guy wires, conductors, wire grips, or dead-end bails to eye-type fittings on insulators, eyebolts, and pole eye plates in overhead electrical systems. They provide a smooth internal contour that prevents stress concentration within preformed dead-end loops, distributing forces during tensioning and deadending operations to enhance connection integrity in guying and conductor support systems.
These fittings are constructed from ductile iron with hot dip galvanized coating or aluminum alloy for durability and environmental resistance. Hardware includes a galvanized steel pin and stainless steel cotter key, reducing corrosion potential for long-term performance. A generous wire seat diameter maintains the shape of cables, wire grips, or bails during use, while an integral pulling eye accommodates tensioning hooks, streamlining field installation and adjustment.
A standard assembly comprises a body, steel pin passing through the insulator eye, and humpbacked cotter key for secure fastening. This configuration allows straightforward assembly and disassembly, with the pin and cotter key serving as primary removable components. Thimble clevises work with preformed dead-ends, distribution grips, and overhead dead-ends, supporting conductor sizes up to 0.783 inches in normal and light duty applications.
Specific series like TC-17 accommodate various distribution grips and dead-ends, while PCTF and PCTA series feature 1.5-inch wire seat diameters for normal duty applications. Formed steel variants with galvanized coating offer economical solutions for light duty scenarios where corrosion potential is lower.
Thimble Clevis Wholesaler with 21 Years of Expertise
RaxPower, established in 2003 and headquartered in Hebei Province, China, is a leading manufacturer of pole line hardware with over 21 years of expertise in R&D, production, and global sales. As a one-stop supplier, we specialize in comprehensive power line solutions, including the Thimble Clevis, guided by our core philosophy that “quality is life, reputation is base.” Our extensive experience and robust infrastructure—featuring 17,000 square meters of production workshops and 5,000 square meters of warehouses—enable us to deliver Thimble Clevis products with unmatched reliability and precision.
Leveraging advanced manufacturing processes like hot forging, we ensure that each Thimble Clevis achieves greater strength and accurate sizing, essential for durable performance in demanding applications. Our team of over 170 dedicated professionals, including 30 technicians and 10 engineers, implements strict quality control from raw material selection to multi-stage testing. Automated machinery guarantees uniform dimensions and consistent output, while our hot-dip galvanizing technology provides superior corrosion resistance, adhering to ISO 1461 standards with mean coating thickness exceeding 85 microns. Rigorous load testing and gauge tests per IEC 120 protocols confirm that every Thimble Clevis meets exacting safety and performance criteria, validated by SGS and authoritative institute certifications. This commitment to excellence ensures that RaxPower’s Thimble Clevis stands as a trusted component in global power infrastructure.
| Series/Type | Body Material | Hardware Material | Cotter Pin Material | Wire Seat Diameter (in) | Applications | Max Conductor Size (in) | Key Features |
|---|---|---|---|---|---|---|---|
| TC-17 | Not specified | Not specified | Not specified | Not specified | Conductor Dead-ends up to 0.783 in | 0.783 | Smooth internal contour, prevents stress concentration |
| PCTF | Ductile iron hot dip galvanized | Steel hot dip galvanized | Stainless steel | 1.5 | Normal duty guying and deadending | N/A | Integral pulling eye |
| PCTA | Aluminum alloy | Steel hot dip galvanized | Stainless steel | 1.5 | Normal duty, higher corrosion potential | N/A | Integral pulling eye |
| Formed Steel | Pressed steel hot dip galvanized | Not specified | Not specified | 1.5 | Light duty | N/A | Economical interface fitting |
Frequently Asked Questions (FAQS)
What is a Thimble Clevis used for?
Thimble Clevises serve as interface connection fittings in suspension or deadend applications, attaching guy wire, conductor, wire grips, or deadend bails to eye-type insulator fittings, eye bolts, and pole eye plates. They are used with Distribution-Grips, Overhead Dead-ends, Coated Dead-ends for conductors up to 0.783 inches, and PREFORMED Dead-ends on suspension-type or deadend insulators.
How does the Thimble Clevis design ensure reliability and prevent stress concentration?
The thimble features a smooth internal contour that prevents stress concentration within the loop of a PREFORMED Dead-end. Its generous wire seat diameter helps cable, wire grips, or bails maintain their shape, while an integral pulling eye area accommodates hooks used in tensioning operations. Construction from durable materials such as ductile iron hot dip galvanized or aluminum alloy provides corrosion resistance and strength for sustained performance in harsh environments.
What material and duty options are available?
Bodies are available in ductile iron hot dip galvanized for general use or aluminum alloy for higher corrosion potential areas. Hardware is steel hot dip galvanized with stainless steel cotter pins. Series include TC-17 for various Dead-ends, PCTF and PCTA for normal duty applications with 1 1/2 inch wire seat diameters, and formed steel thimble clevises for light duty, economical options.
How is maintenance and replacement performed?
For removal or replacement of an insulator or during maintenance, only the cotter key and steel pin need to be removed to release the clevis, facilitating efficient and straightforward disassembly with minimal downtime.
Can Thimble Clevises accommodate fiber optic cable applications?
Yes, Thimble Clevises are compatible with Dead-ends for optical cable through the appropriate series, ensuring they meet specialized hardware needs.
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