![]() ![]() Available in non-threaded and single and dual-ended threaded models, these pins are suitable for positioning and attaching components within assemblies, such as wheels and levers to shafts.ĭrive pins, grooved pins, and knurled pins are some of the other types of dowel pins available. Primarily used in mechanical engineering, taper pins are a common type of dowel pins which has a larger diameter on one end which gradually tapers towards the smaller end. Some of the typical applications of dowel pins include furniture assembly and use as simple hinges or axles. These fasteners are available in high-precision tapered, slotted, spiraled, stepped, and grooved designs and, typically, have high coefficients of friction which allow them to fix assemblies into place. Dowel Pinsĭowel pins are short, straight, and cylindrical rods used to help align machine components before they are fastened together using other fasteners, such as screws or bolts. Some of the types of cotter pins available include bowtie pins, clinch pins, hairpin cotters, ring cotters, and twist pins. These characteristics make it suitable for insertion into and the fastening of pre-drilled components, as well as for locking other fasteners. The most ubiquitous type of cotter pins-split cotter pins-has a rounded head and flexible tines. Employing a quick-release, semi-circular or circular design, these fasteners generally require a pre-drilled hole or wrap around a shaft component during installation. Cotter PinsĬotter pins, also referred to as cotter keys or wire clips, are two-tined wire fasteners used in machine assembly applications to help secure parts or other fasteners (e.g., clevis pins or slotted nuts) in place and prevent their loosening over time. ![]() The following sections describe each of the above-mentioned categories of machine pins, as well as provide examples of their respective subtypes. The machine pin fasteners commonly employed in industrial and commercial applications can be classified into several general categories, which include: Determining the optimal type of machine pin for use is largely dependent on the requirements of the application, as each type of pin is used to perform different functions and operations. In addition to the above characteristics, these components are available in a variety of sizes and materials-including metal, plastic, and wood-with different designs to suit a multitude of applications. Available in semi-permanent and quick-release models, installation and removal for these fasteners may require additional pressure or tools (i.e., semi-permanent) or have a spring-loaded mechanism which locks them into place allowing for the ease of installation and removal (i.e., quick-release). Machine pins-also referred to as pin fasteners or fastening pins-are a type of specialty fastener employed to properly align and join together two parts or components. A cotter pin locks a gear shaft in place. ![]()
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