Parallel Key Pins
Outstanding Features of Parallel Key Pins
1. High connection stability
Precise positioning
• The shape of the parallel key pin is regular, and its rectangular cross-section can fit closely with the corresponding keyways on the shaft and the hub. After installation, it can accurately determine the axial and circumferential positions of the hub on the shaft, ensuring that there will be no relative rotation and axial displacement between the connected components. For example, in the transmission system of machine tools, the gears and shafts connected by parallel key pins can maintain an accurate positional relationship during the operation of the equipment, thus ensuring the accuracy of power transmission and the precision of mechanical motion.
Tight fit
• The contact between the parallel key pin and the keyway is surface contact. This contact mode enables them to evenly distribute stress when transmitting torque. Compared with other connection methods, such as some connectors relying on point contact, the parallel key pin is less likely to have local deformation or damage when subjected to large torque, thus ensuring the stability of the connection. For example, in the connection between the motor shaft and the fan impeller of large industrial fans, the parallel key pin can stably transmit torque and ensure the normal operation of the impeller.
2. Efficient torque transmission
Reliable power transmission
• When the shaft rotates, the parallel key pin transmits torque through the friction between its side and the keyway. Due to its tight fit and appropriate contact area, it can effectively transmit the power of the shaft to the hub and drive the connected components to rotate. For example, in the transmission of an automobile, the parallel key pin transmits the power of the input shaft to each gear, realizing efficient power transmission and ensuring the normal gear shifting and driving of the automobile.
Adaptability to various working conditions
• The parallel key pin can work under different rotational speed and torque conditions. Whether in small precision equipment with high-speed rotation or in large mechanical devices with low speed and high torque, as long as the design is reasonable, the parallel key pin can effectively transmit torque. For example, in the transmission systems of high-speed electric tools and low-speed and heavy-duty cranes, the parallel key pin plays a key role in torque transmission.
3. Strong universality
Wide adaptability
• The shape and size of the parallel key pin have a relatively high degree of standardization. In mechanical design and manufacturing, it is easy to select a suitable parallel key pin according to the size of the shaft and the hub. It can be matched with various types of shafts and hubs. Whether it is a cylindrical shaft, a conical shaft, or hubs of different materials and shapes, as long as there are corresponding keyways, the parallel key pin can make the connection. For example, in the manufacturing of general machinery, the parallel key pin can be used to connect the motor shaft with various pulleys, sprockets, etc.
Simple installation and disassembly
• The installation process of the parallel key pin is relatively simple. Usually, it only needs to insert the parallel key pin into the keyways of the shaft and the hub. When it needs to be disassembled, it is also quite convenient. Using appropriate tools (such as punches, etc.), the parallel key pin can be taken out from the keyways. This simple installation and disassembly method is convenient for the maintenance and replacement of mechanical components. For example, during the daily maintenance of equipment, when it is necessary to replace a worn gear, it is easy to take out the parallel key pin, complete the replacement of the gear, and then insert a new parallel key pin.
4. Good cost-effectiveness
Reasonable material cost
• The main materials of the parallel key pin, such as carbon steel and alloy steel, have relatively reasonable prices. On the premise of meeting the mechanical performance requirements, the material cost can be effectively controlled. For large-scale production of mechanical products, this can reduce the overall production cost while ensuring the quality. For example, in the manufacturing of ordinary industrial equipment, using carbon steel parallel key pins can keep the material cost at a low level while ensuring the connection function.
Mature manufacturing process
• The manufacturing processes of the parallel key pin, such as milling and grinding, are relatively mature, and the production efficiency is relatively high. This makes the processing cost of the parallel key pin relatively low and can ensure the quality and consistency of the products. In batch production, the cost can be further reduced by optimizing the process and production flow. For example, in professional processing factories of mechanical parts, using advanced processing equipment and mature processes can efficiently produce high-quality parallel key pins.
Materials we can use on Parallel Key Pins
Applications of Parallel Key Pins
Parallel key pins are widely used in lighting, household appliance products, furniture, medical devices, automotive industry, home decoration, electronics industry, bathroom industry, mechanical manufacturing.
