Buyers Products Clevis Pin is manufactured to SAE standards and available in multiple sizes to fit your application. The clevis pin is used with rods, cables, yoke ends, and other assemblies. It can be ordered with a cadmium- or zinc-plated finish in quantities to your specification.
Specifications
| (0) Drill No. | 29 (.136) |
|---|---|
| A | 0.500 |
| B | 0.625 |
| C | 0.156 |
| D (Min.) | 1.766 |
| E | 1.984 |
| F | 2.141 |
| Finish | Zinc Plated Clear |
| G | 0.109 |
The S.A.E. Standard Clevis Pin, with its precise dimensions of 1/2 inch in diameter and 1-63/64 inches in length, represents a critical component in countless mechanical linkages across a vast array of industries. Engineered and manufactured to stringent Society of Automotive Engineers (S.A.E.) standards, this clevis pin is designed for unparalleled reliability, dimensional accuracy, and robust performance in demanding applications. Its fundamental role is to facilitate the connection of two or more components, typically a clevis (or yoke) and a connecting rod or cable, allowing for rotational movement while maintaining a secure, axial connection. The S.A.E. standard designation is not merely a label; it signifies adherence to a globally recognized set of specifications for material composition, dimensional tolerances, mechanical properties, and testing protocols. This commitment to standardization ensures that each pin provides consistent form, fit, and function, thereby guaranteeing interchangeability and predictable performance within a system. This specific clevis pin, through its precise engineering and robust construction, serves as an essential element in systems requiring reliable pivot points and load transmission, offering a balance of strength, durability, and operational flexibility.
The Significance of S.A.E. Standardization in Fastener Engineering
Adherence to S.A.E. standards for a clevis pin, such as the 1/2 inch diameter variant, is paramount for ensuring quality, safety, and operational efficiency in mechanical assemblies. The S.A.E. organization develops technical standards that are widely adopted in the automotive, aerospace, and commercial vehicle industries, among others. For fasteners like clevis pins, S.A.E. standards dictate critical aspects ranging from raw material specifications and manufacturing processes to final product dimensions and performance characteristics. This includes minimum shear strength, tensile strength, hardness, and fatigue resistance, which are all vital for components subjected to dynamic loads and stresses. By manufacturing to S.A.E. standards, Buyers Products guarantees that this clevis pin meets or exceeds the rigorous performance requirements expected in professional-grade applications. It provides engineers and procurement specialists with confidence in the product's ability to withstand specified operational conditions without premature failure, thereby minimizing downtime, reducing maintenance costs, and enhancing overall system safety. Furthermore, S.A.E. compliance facilitates easier integration into existing designs and ensures compatibility with other standardized components, simplifying design, assembly, and replacement procedures. The robust framework of S.A.E. standards minimizes variability in manufacturing, leading to a consistently high-quality product that can be relied upon in critical linkage applications where performance is non-negotiable.
Detailed Dimensional Analysis and Functional Importance
Understanding the specific dimensions of the S.A.E. Standard Clevis Pin (1/2" Diameter x 1-63/64" Long) is crucial for proper application and performance. The primary dimension, 'A', representing the nominal diameter, is precisely 0.500 inches. This half-inch diameter dictates the pin's shear strength and its compatibility with corresponding clevis holes and component bores. A correctly sized pin ensures minimal play within the assembly, reducing wear and concentrated stresses, which are critical for maintaining the integrity of the mechanical joint. The overall length, 'E', measured at 1.984 inches (equivalent to 1-63/64 inches), defines the total length of the pin from the underside of the head to its distal end. This dimension is vital for accommodating the thickness of the joined components and allowing sufficient protrusion for the cotter pin or other retaining mechanism. The 'D (Min.)' dimension of 1.766 inches signifies the minimum grip length or effective working length of the pin, indicating the maximum thickness of material it can securely hold before the cotter pin hole is obstructed or compromised. This ensures adequate engagement and prevents the pin from being improperly seated. The 'B' dimension, 0.625 inches, specifies the diameter of the pin's head, which serves to prevent the pin from passing through the clevis and distributes the load over a larger area, reducing localized stress on the clevis arm. The 'C' dimension, 0.156 inches, typically refers to the radius or chamfer under the head, facilitating easier insertion and preventing sharp edges from damaging the clevis. The 'F' dimension, 2.141 inches, represents the maximum overall length from the top of the head to the cotter pin hole, providing additional context for clearance and fitment. Finally, the '(0) Drill No. 29 (.136)' for the cotter pin hole signifies its precise diameter of 0.136 inches. This dimension is critical for selecting the appropriate cotter pin, ensuring a snug fit that prevents accidental dislodgement of the clevis pin itself. The 'G' dimension, 0.109 inches, specifies the distance from the end of the pin to the center of the cotter pin hole, ensuring optimal positioning for cotter pin insertion and secure retention. Each of these precisely controlled dimensions collectively ensures the clevis pin’s robust functionality, ease of assembly, and long-term reliability in its intended applications.
Material Science and Mechanical Properties for Optimized Performance
The selection of material for an S.A.E. Standard Clevis Pin is a fundamental aspect that directly influences its mechanical properties and suitability for diverse operational environments. Typically, these pins are manufactured from high-strength carbon steel, often low-carbon steel grades that are cold-formed to achieve enhanced strength and ductility. Common material specifications might include grades like SAE 1010, 1018, or 1045, depending on the required load-bearing capacity and application severity. The choice of material ensures a balance between sufficient tensile strength to resist pulling forces and excellent shear strength to withstand forces perpendicular to the pin's axis. For a 1/2-inch diameter pin, the shear strength is a critical parameter, as it is the primary mode of failure for clevis pins under operational loads. High-quality steel, conforming to S.A.E. material specifications, undergoes rigorous metallurgical testing to verify its chemical composition and microstructure. This includes analysis for carbon content, manganese, silicon, phosphorus, and sulfur, which collectively dictate the steel's hardenability, weldability, and overall mechanical performance. Beyond strength, material hardness is also crucial, impacting the pin's resistance to wear, abrasion, and deformation over its service life. While not typically heat-treated to extremely high hardness levels like some bolts, clevis pins are often cold-formed, a process that work-hardens the material, improving its yield strength and surface finish. The inherent ductility of the chosen steel also allows the pin to deform plastically under extreme loads before catastrophic brittle failure, providing a safety margin in overload conditions. For applications requiring enhanced corrosion resistance, stainless steel variants (e.g., 304 or 316) might be specified, though these often have different mechanical properties and cost profiles. The careful selection and processing of the base metal are integral to the longevity and reliable functioning of the clevis pin within demanding mechanical systems, ensuring it consistently meets the robust performance expectations set by S.A.E. standards.
Advanced Surface Finishes: Zinc Plating and Cadmium Plating
To enhance the durability and longevity of the S.A.E. Standard Clevis Pin, two primary surface finishes are offered: zinc plating and cadmium plating. Each finish provides distinct advantages, primarily in corrosion resistance and wear protection, tailored to different environmental and application requirements. The specified finish for this particular pin is "Zinc Plated Clear," offering excellent protection against oxidation and rust. Zinc plating involves electrodepositing a thin layer of zinc onto the steel substrate. This process creates a sacrificial coating; meaning the zinc corrodes preferentially to the underlying steel, thereby protecting the pin even if the coating is scratched or compromised. The "clear" designation refers to the passivating layer applied over the zinc, which is typically a clear chromate conversion coating. This chromate layer significantly enhances the corrosion resistance of the zinc, providing a barrier against moisture and environmental aggressors while maintaining the bright, metallic appearance of the zinc. Zinc plating is a cost-effective and environmentally favorable option for many industrial and outdoor applications, providing good to excellent resistance in mild to moderately corrosive environments. It also offers a degree of lubricity, which can facilitate easier assembly and disassembly. Cadmium plating, while also an electrodeposited sacrificial coating, offers superior performance in certain niche applications, particularly those exposed to saltwater or extreme temperature fluctuations. Cadmium is highly resistant to marine environments, galvanic corrosion when coupled with aluminum, and provides a lower coefficient of friction. However, due to environmental concerns regarding cadmium toxicity (it is a restricted substance under regulations like RoHS), its use is generally limited to specific aerospace, defense, and specialized industrial applications where its unique properties are indispensable and no suitable alternative exists. The choice between zinc and cadmium plating depends on a thorough assessment of the operational environment, regulatory compliance, and desired service life. For the vast majority of applications, the Zinc Plated Clear finish on this S.A.E. Clevis Pin provides an optimal balance of robust corrosion protection, aesthetic appeal, and environmental responsibility, ensuring the pin maintains its structural integrity and functional performance over an extended period.
Diverse Industrial Applications of the S.A.E. Standard Clevis Pin
The inherent versatility and robust construction of the S.A.E. Standard Clevis Pin make it an indispensable component across an expansive range of industrial and commercial applications. Its design, optimized for secure, pivoting connections, allows it to be utilized wherever a reliable mechanical linkage is required to transmit force or support rotational movement. In the **automotive sector**, these clevis pins are crucial for steering linkages, brake pedal assemblies, clutch mechanisms, and various suspension components, ensuring precise control and reliable operation under dynamic loads. Their presence is also critical in **trailer hitches** and towing equipment, connecting tow bars to vehicles or trailer frames, enduring significant tensile and shear forces. Within **agricultural machinery**, clevis pins are foundational. They are used extensively in connecting implements to tractors, securing hydraulic cylinder ends, attaching various linkages in plows, cultivators, planters, and harvesters. The ability to withstand harsh outdoor conditions and heavy vibrations, especially when zinc-plated, makes them ideal for these demanding environments. For **construction equipment**, such as excavators, loaders, dozers, and cranes, clevis pins are vital in articulating joints, bucket linkages, hydraulic cylinder connections, and attachment points for various tools and accessories. Their strength is paramount in these applications where heavy loads and extreme forces are routine. In **marine applications**, particularly for boat trailers, stern drive linkages, and general rigging (though often requiring stainless steel variants), clevis pins ensure secure connections, even in corrosive saltwater environments when suitably finished. The **material handling industry** employs clevis pins in forklift attachments, conveyor systems, hoists, and overhead cranes, providing essential pivot points for lifting and moving heavy goods safely. Furthermore, they find application in **industrial machinery** for connecting actuators, control linkages, tensioning systems, and various custom equipment where adjustable or removable pivot points are necessary. Even in **general fabrication and repair**, from custom brackets to securing gates and fences, the S.A.E. Standard Clevis Pin offers a standardized, reliable, and easily replaceable solution. The specific dimensions of 1/2 inch diameter and 1-63/64 inch length are among the most commonly specified, making this particular pin a workhorse across these diverse sectors, affirming its status as a critical, high-performance fastening solution.
Installation, Securement, and Maintenance Best Practices for Longevity
Proper installation and diligent maintenance are crucial for maximizing the service life and ensuring the continued safe operation of the S.A.E. Standard Clevis Pin. The primary method of securing a clevis pin is through the use of a cotter pin or a spring clip (e.g., hairpin cotter). For this 1/2-inch diameter pin, the pre-drilled cotter pin hole of 0.136 inches (Drill No. 29) dictates the size of the retaining mechanism. When installing, it is imperative to select a cotter pin of appropriate material (typically steel, galvanized, or stainless steel) and diameter that fits snugly within the hole without excessive play. After inserting the clevis pin through the aligned components and the clevis fork, the cotter pin is then passed through the designated hole. For traditional split cotter pins, the legs must be bent over (one leg up, one leg down, or both legs parallel to the clevis pin shaft) to prevent accidental dislodgement. Hairpin or bowed cotters offer easier installation and removal, making them suitable for applications requiring frequent disassembly. It is critical to ensure that the cotter pin is fully seated and securely bent or latched, as a loose or improperly installed retainer can lead to the clevis pin working its way out, resulting in catastrophic failure of the linkage. Regular inspection of the clevis pin and its retaining mechanism is a vital maintenance practice. Technicians should look for signs of wear, such as elongation of the cotter pin hole, grooving on the pin's shaft, or deformation of the head. Corrosion on the pin or deterioration of the plating (especially for zinc-plated pins) indicates a compromised protective layer and warrants closer inspection or replacement. Excessive play within the joint, often evidenced by rattling or looseness, can signal wear on the pin or the clevis holes, necessitating replacement of the worn components. Lubrication, where appropriate for the application and environment, can also extend the life of the pin by reducing friction and wear, though this must be considered in conjunction with the plating type and environmental factors. Adhering to manufacturer specifications for torque (if applicable to the assembly), load limits, and environmental exposure will contribute significantly to the pin's operational longevity. Proactive replacement of clevis pins showing signs of significant wear or damage, rather than waiting for failure, is a key component of preventative maintenance strategies that minimize downtime and enhance safety across all industries utilizing these critical fasteners.
Manufacturing Excellence and Quality Control for Superior Reliability
The manufacturing process for the S.A.E. Standard Clevis Pin embodies precision engineering and stringent quality control protocols to ensure its superior reliability and adherence to S.A.E. standards. The journey begins with the selection of high-grade steel wire or bar stock, precisely chosen to meet specific metallurgical specifications for strength and durability. The primary forming method often involves **cold heading**, a process where a wire coil is fed into a machine that strikes it with a die to form the pin's head and body without applying heat. Cold heading not only creates the desired shape efficiently but also work-hardens the material, improving its tensile and shear strength while maintaining grain flow for enhanced fatigue resistance. Following cold heading, the pins undergo a **chamfering or trimming process** to ensure smooth edges and precise lengths. The critical **drilling of the cotter pin hole** is then performed with high accuracy to meet the 0.136-inch (Drill No. 29) diameter and the specified 'G' dimension (0.109 inches from the end), guaranteeing perfect fitment for retaining pins. For pins requiring enhanced surface protection, they proceed to the **plating stage**. As specified, the Zinc Plated Clear finish involves a meticulously controlled electroplating process, followed by a clear chromate conversion coating. This multi-step process is carefully monitored to ensure uniform coating thickness and optimal adhesion, which are vital for achieving the desired level of corrosion resistance and finish quality. Throughout the entire manufacturing chain, an exhaustive **quality control regimen** is implemented. This includes incoming material inspection to verify raw material composition, in-process checks to monitor dimensional accuracy after each forming operation, and rigorous final inspection of finished products. Dimensional verification utilizes precision measurement tools such as calipers, micrometers, and optical comparators to confirm that every pin adheres to the 'A', 'B', 'C', 'D', 'E', 'F', and 'G' specifications within tight S.A.E. tolerances. Plating quality is assessed through non-destructive methods like X-ray fluorescence (XRF) for coating thickness and visual inspections for uniformity and coverage. Furthermore, batch testing may include destructive tests such as salt spray testing to validate corrosion resistance performance, and shear strength tests to confirm mechanical integrity. By integrating these advanced manufacturing techniques with a robust quality assurance system, Buyers Products ensures that each S.A.E. Standard Clevis Pin delivered meets the highest standards of engineering excellence, providing users with a consistently high-performing and dependable fastening solution for their most demanding applications.
Key Advantages and Value Proposition
The S.A.E. Standard Clevis Pin, with its 1/2-inch diameter and 1-63/64-inch length, offers a compelling value proposition rooted in its adherence to rigorous S.A.E. standards and the meticulous manufacturing processes employed by Buyers Products. The primary advantage lies in its **uncompromised reliability and strength**. Built to withstand the shear and tensile stresses inherent in mechanical linkages, this pin ensures robust performance even in high-load, high-vibration environments. The precise dimensional control, as evidenced by specifications for diameter, length, head dimensions, and cotter pin hole placement, guarantees **optimal fit and reduced wear**, minimizing play in the joint and extending the life of interconnected components. This precision also translates into **ease of assembly and interchangeability**, simplifying maintenance and replacement procedures across various applications. The **Zinc Plated Clear finish** provides a critical layer of defense against corrosion, safeguarding the pin's structural integrity against rust and environmental degradation. This not only enhances the pin's longevity but also maintains its aesthetic appeal and ensures reliable operation over extended periods, even in outdoor or moderately corrosive settings. For applications with stricter environmental or performance demands, the option for cadmium plating further extends the product's versatility. The S.A.E. standardization itself is a significant advantage, providing engineers and purchasers with the assurance of a product that meets globally recognized benchmarks for quality and performance, eliminating guesswork and reducing risks associated with non-standard components. Choosing this clevis pin means investing in a fastener that has been engineered for **durability and consistency**, reducing the likelihood of premature failure and the associated costs of downtime, repairs, and potential safety hazards. Buyers Products' commitment to quality, combined with the technical specifications of this clevis pin, delivers a product that is not just a component, but a reliable solution contributing to the overall integrity and operational efficiency of complex mechanical systems. Its robust design, protective finish, and adherence to industry-leading standards collectively make it an economical and high-performance choice for a wide spectrum of industrial, agricultural, automotive, and construction applications.
Conclusion
In summary, the S.A.E. Standard Clevis Pin, meticulously engineered with a 1/2-inch diameter and a 1-63/64-inch length, represents the pinnacle of robust and reliable fastening technology. Its strict adherence to S.A.E. specifications, coupled with precision manufacturing, guarantees exceptional dimensional accuracy, mechanical strength, and consistent performance. The carefully selected materials and protective Zinc Plated Clear finish, or optional cadmium plating, provide superior corrosion resistance and extend the operational lifespan in challenging environments. From the critical linkages in heavy machinery and agricultural equipment to essential components in automotive and marine applications, this clevis pin stands as a testament to engineering excellence, offering a secure and pivotal connection that is both easy to install and maintain. Buyers Products’ dedication to quality control ensures that each pin delivers the durability and reliability expected in demanding industrial settings, making it an indispensable component for any assembly requiring a high-performance, standardized, and dependable pivot pin. Opting for this S.A.E. Standard Clevis Pin ensures not only compliance with industry benchmarks but also a long-term, cost-effective solution for securing your most critical mechanical connections.
