This 3D model represents a Spur Gear, one of the most common types of gears used in mechanical power transmission systems. Spur gears have straight teeth that are parallel to the axis of rotation and are widely used for transmitting motion and torque between parallel shafts. This model demonstrates basic mechanical CAD modeling techniques including gear profile creation, extrusion, and parametric design. Spur gears are commonly used in gearboxes, mechanical drives, industrial machinery, and automotive systems.