Attachment device

A device for attaching a rotating element to a shaft, comprising:

• a central hub comprised of a continuous base and a semicircular-shaped removable collar, wherein said base and collar are centrally positioned within the rotating element to provide alignment and stability;
• a rotating element, chosen from the group consisting of a pulley, a gear, a coupling, a clutch, and a sprocket, which is connected to the shaft through a keyway;
• wherein this connection is secured by a conventional key held within the removable collar, offering a robust attachment capable of enduring varying speeds and torques;
• a plurality of multiple threaded fasteners for affixing the removable collar to the continuous base via corresponding through holes and threaded holes;
• and,
• a plurality of recessed areas located on the outer surface of the removable collar designed to house the threaded fasteners, strategically placed to maximize the contact area with the conventional key and the shaft, thus ensuring a friction fit that is reliable under various operational conditions;
• and,
• wherein the recessed areas are extended to accommodate two threaded fasteners per side, allowing for an adjustable and secure attachment method capable of handling increased speeds and torque;
• wherein the device is configured to facilitate the secure and adjustable attachment of various rotating elements the shaft by leveraging the semicircular-shaped removable collar and extended recessed areas for enhanced structural integrity and operational reliability;
• and,
• wherein this configuration ensures that the rotating element remains affixed to the shaft without rotational or axial slippage.