Handrads

Handrads, also known as handwheels, are manual control devices typically used to operate machinery. They provide a mechanical advantage, allowing a user to apply a significant amount of torque to a rotating shaft with relatively little effort. This makes them ideal for applications where precise adjustments or significant force is needed, such as opening and closing valves, positioning machine tool components, or controlling the speed of certain devices.

The design of a handrad can vary greatly depending on its intended use. Common materials include cast iron, steel, aluminum, and various plastics. Some handrads are smooth, while others feature knurled or textured surfaces for improved grip. They can be solid discs, spoked wheels, or incorporate ergonomic handles to enhance user comfort and control, especially during prolonged operation. The method of attachment to the machinery is also diverse, with common options including a keyed bore, a tapered bore, or a set screw fitting. The selection of a handrad is influenced by factors such as the required torque, operating environment, desired aesthetics, and safety considerations.