● Stop pin is the rivets with two head smaller than the middle. The stop pin is a very important part of the clutch driven disc assembly. Its function is to limit the torque of the absorber and protect the spring of the absorber.
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Stop pins and rivets are two types of fasteners used in various industrial, mechanical, and construction applications. Though they are both used to create a permanent joint, their designs and functions are significantly different. While stop pins are mainly used to prevent parts from exceeding a certain position, rivets serve as fastening bolts in numerous applications. Here are the main differences between stop pins and rivets:
(1)Design: Stop pins and rivets have different designs. Stop pins have a head on one end and a blunt tip on the other, while rivets have two heads of equal diameter, one on each end. The shaft of a stop pin usually has a smaller diameter than that of a rivet.
(2)Function: The main function of stop pins is to prevent parts from exceeding a particular position. Stop pins ensure that two or more parts do not separate from each other past a predetermined point. In contrast, rivets are used to fasten two parts in a permanent joint.
(3)Installation: Stop pins are installed by placing them in a pre-drilled hole until the head of the stop pin is flush with the surface of the part. Rivets, on the other hand, are installed by inserting them into a drilled hole and compressing them until they form a permanent joint.
(4)Hole Size: Stop pins and rivets require different sizes of drilled holes. The hole size for stop pins is usually slightly smaller than the diameter of the shaft to ensure that the stop pin will remain in place. Rivet holes need to be drilled to a precise diameter to ensure a proper fit and a secure joint.
(5)Use: Stop pins are used in various applications, including automotive, aerospace, electronics, and construction. They are typically used to ensure proper alignment of parts or to prevent parts from shifting position. Rivets, on the other hand, are used in applications where a permanent joint is necessary. They are commonly used in the construction, automotive, and aerospace industries.
(6)Size Variety: Stop pins typically come in a range of sizes and lengths. Their diameter ranges are generally smaller as compared to those of rivets, making them suitable for applications where the range is limited. Rivets, however, are one size and are used for a wide range of applications.
Here are some of the key safety considerations when using stop pins:
(1)Sharp Edges: Stop pins usually have a blunt tip on one end and a head on the other end. However, during installation, the sharp edges of the holes or parts can cause injury to the operator. It is therefore necessary to wear protective gloves when installing stop pins to prevent injury to the fingers.
(2)Positioning: Stop pins are typically used to prevent parts from exceeding a certain position. The positioning of stop pins should be carefully considered to ensure that the parts remain in place during operation. Poor positioning of the stop pins can cause parts to come loose or move out of position, resulting in damage or injury.
(3)Material Compatibility: Stop pins can be made from various materials, including steel, brass, and aluminum. However, it is essential to ensure that the materials used are compatible with the particular application. For example, using a material that corrodes easily can weaken the joint, resulting in a risk of failure.
(4)Installation Procedure: It is important to ensure that the stop pins are installed correctly to prevent them from coming loose during operation. The drilled holes must always be clean and free of debris, and the stop pins should be inserted all the way through the hole until the head is flush with the surface. A partially inserted pin can cause the parts to come loose, resulting in a safety hazard.
(5)Working Load: Stop pins have a specific working load, and it is important to ensure that the pins used have a suitable weight rating for the application. Failure to use the correct weight-rated stop pins can result in damage to the equipment or even injury to personnel working in close proximity to the pin.
(6)Environmental Conditions: Stop pins can be affected by harsh environmental conditions such as extreme temperatures, UV light, and chemicals. It is therefore important to ensure that they are made from materials that can withstand these conditions or are coated to protect against corrosion.
(7)Regular Maintenance: Stop pins need to be regularly inspected and maintained to ensure proper function and prevent accidents. Regular inspection can detect any damage or wear that could compromise the integrity of the joint