Small size, portable bender

A portable bender having a case body which is small in both size and weight enough to permit transportion of said bender by the hands of a user, and therein comprising a miniature, single-phase commutator motor, a drive shaft, a reduction gear mechanism for transmitting a rotational drive force from said motor to said drive shaft, clutch means for connecting and disconnecting the transmission of said rotational drive force to said drive shaft, a stationary shaft disposed coaxially of said drive shaft to protrude through said case body, stopper block means for a member to be bent disposed on the outer surface of said case body to be spaced at a determined distance from said stationary shaft, a slot formed in said outer surface arcuately elongated around the center of said stationary shaft, a bending roller provided on said outer surface and so linked to said drive shaft as to be turned along said arcuately elongated slot for applying a bending force to a member to be bent, bending angle control means operable to cause said clutch means to disconnect said rotational drive force from said drive shaft when said drive shaft has turned to a determined angle, and elastic means for restoring said drive shaft to the initial position when said clutch has disconnected said rotational drive force from said drive shaft.