Hand Crank Mean?
A hand crank is defined as an assembly of components consisting of an arm (or lever) perpendicularly attached to a rotating shaft. The arm is usually rotated in a circular motion which is then reciprocated down to the shaft. The arm can either be a bent segment of the shaft or attached as a separate component.
In trenchless applications, hand cranks are often used in equipment like the prairie dog drill.
Trenchlesspedia Explains Hand Crank
Hand cranks are used in a number of tools, equipment, and applications. In trenchless equipment, such as the prairie dog drill, the hand crank is used to advance the pilot drill bit into the ground during the drilling process.
When using the prairie dog drill, the hand crank should be rotated using a light and consistent pressure to avoid the production of excessive forces on the pilot bit, which can unnecessarily tire the operator and potentially cause damage to the drill bit.