Hollow Saddle

A Hollow Saddle key is used to secure a rotating element, like a gear or pulley, to a shaft. It has a concave surface that matches the shaft's curvature, providing a better fit and greater surface contact. This key transmits torque, ensures easy assembly and disassembly, and distributes load evenly, reducing damage risks. It's commonly used in machinery, heavy-duty applications, and agricultural and construction equipment for secure and stable torque transmission.