![]() R-clip cotter pins feature a curved prong that wraps around the side of components. Extended prong cotter pins are bent around the back of components manually. Each type, though, works in a different way. They all consist of a single piece of bent metal with two prongs. As you strike the head with a hammer, the ends of the prongs will close together.Įxtended prong, R-clip and hammer lock are some of the most common cotter pins. You can use a hammer lock cotter pin by inserting it into a hole and then striking it with a hammer. The end of the long prong curved inward towards the opposite, shorter prong. The only difference is that hammer lock cotter pins are curved on the end. They look like extended prong cotter pins. Hammer lock cotter pins are a type of locking fastener that, as the name suggests, requires a hammer to install. The curved prong should then wrap around the side of the cylindrical-shaped component Hammer Lock ![]() To use an R-clip cotter pin, you’ll need to insert the straight prong into a hole. The other prong on an R-clip cotter pin is curved. They feature two prongs - just like extended prong cotter pins. R-shaped cotter pins are used around cylindrical-shaped components, such as tooling balls. Rather, R-clip cotter pins feature an R-shaped design. They don’t feature the same U-shaped design as extended prong cotter pins. R-clip cotter pins are made of metal as well, but they are shaped differently. Bending the ends of the prongs will secure the cotter pin and, thus, the component with which it’s used. You can then bend the ends of the prongs around the back of the component. To use an extended prong cotter pin, simply insert it into a hole. One of the prongs is slightly longer than the other prong. As shown in the adjacent photo, extended prong cotter pins feature two long and narrow parallel prongs. One of the most common types of cotter pins is extended prong. While all cotter pins function as metal fasteners, though, they are available in different types. And you can typically remove cotter pins by pulling them out of the hole. You can insert a cotter pin into a hole to secure a component. Also known as split pins, they are designed for use in holes. Their easy removal makes them suitable for adjustable linkages, trailer couplings, and frequently removed clevis pins.Cotter pins are fasteners consisting of a piece of metal. R-clip cotter pins are more easily removed and reused than the other two types. Their uses vary from locking clevis pins and castle nuts like extended prong cotter pins and hammerlocks to securing clevis pins with a groove cut around the circumference. ![]() Instead, they resemble the letter R or a heavy-duty hairpin when viewed from the right angle. ![]() R-clip or hairpin cotter pins look different than an extended prong or hammerlock type. This action separates the prongs and locks the hammerlock cotter pin into place, preventing the castle nut or clevis pin from loosening. Hammerlock cotter pins work by striking the looped end with a hammer while inserted through a fastener, forcing the shorter prong past the longer curved prong. Hammerlock cotter pins resemble extended prong cotter pins except that the longer prong curves toward the opposite prong. They work by inserting the prongs through a hole drilled cross-wise through a bolt and castle-nut combination or clevis pin and bending the prongs away from each other and around the castle-nut or clevis pin. Prong, or extended prong, cotter pins are the most common type and resemble a folded piece of flattened wire with parallel prongs. Prong or extended prong An old cotter pin used for a chariot | Heritage Arts/Heritage Images via Getty Images Of course, there are several other types of cotter pins, but these three main types will meet the needs of most applications, as explained by Grainger and One Monroe Aerospace. A single piece of wire forms the basis of all three types, and they all function similarly to keep fasteners securely mated together. The three main types of cotter pins include the typical prong and extended prong, hammerlock, and R-clip or hairpin varieties. ![]()
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