







The open mouth pin is an essential component in the realm of hardware, defined as follows:
Basic Definition
The open mouth pin, interchangeably known as a spring pin or safety pin, is a vital mechanical hardware component. Typically crafted from top-tier steel or other robust elastic materials, it features one or multiple openings, granting it superior elasticity and versatility.
Main Features
1. Shape and Structure: Open mouth pins are predominantly cylindrical in form with openings strategically positioned at one or both ends. This ingenious design facilitates the insertion of the split pin into a hole, allowing it to be deftly folded to either side. This ensures secure connections among two or more components.
2. Elasticity and Toughness: Renowned for their exceptional elasticity and resilience, open mouth pins endure repeated bending without succumbing to breakage or cracks. This durability affords the split pin a steadfast hold when fastening components, all while simplifying the disconnection and reconnection process.
Action and Use
1. Fixed Function: A split pin's principal role is to steadfastly fix and interconnect multiple components, ensuring immobility and preventing unwanted loosening. For instance, in bolted assemblies, split pins are utilized to anchor into bolt tail holes and nut grooves, effectively thwarting nut loosening by securing the tail.
2. Wide Application: Thanks to its distinctive design and performance properties, open-end pins find versatile applications across diverse industries, including machinery, automotive, aviation, maritime, furniture, and electronics. In myriad mechanical linkages, split pins are indispensable in securing, connecting, and preventing loosening.
Specifications and Standards
1. Nominal Specifications: Open-end pins come in an extensive range of nominal specifications, from 0.6mm to 20mm, offering tailored choices to meet specific requirements.
2. Standard Specifications: The manufacturing and application of open-end pins adhere to stringent standard specifications, such as the Chinese national standard GB/T 91-2000. These standards meticulously detail the essential dimensions, technical requisites, and acceptance criteria for open-end pins.
Installation and Precautions
1. Installation Method: When installing a split pin, it is crucial to ensure its nominal specifications align perfectly with the pin hole diameter. Avoid substituting with wires or alternative materials. Insert the split pin gently using hands or pliers, refraining from using hammers that may inflict damage. When bending open the pin, use a screwdriver, maintaining an opening angle of about 60°. If necessary, the opening pin can be adjusted to prevent collision with the workpiece.
2. Precautions: Prior to using a split pin, inspect its surface meticulously for any burrs, cracks, or signs of rust to prevent utilizing defective pins. Equally important is confirming the split pin's installation is accurate and securely fixed to maximize its connecting function.
In conclusion, open-end pins are invaluable mechanical connectors, playing a pivotal role in securing assemblies. A thorough grasp of their attributes, applications, specifications, and installation procedures empowers users to optimally choose and employ split pins, ensuring mechanical connections remain reliable and secure.