Revolutions per minute regulation device for a hand-held electric tool and method of its manufacture

Revolutions per minute (RPM) control device for a hand-held electric tool insertable as a separate block-like unit (5) into a space in the region of a handle (4) and a drive motor housing (3) of the electric tool comprising a RPM sensor for checking the RPM of an electric motor in the drive motor housing of the electric tool by a rotating excitation device (2) driven by said electric motor which RPM sensor (6) is connected with the separate blocklike unit (5) of said control device via an elongated flexible cable (8), wherein the improvement comprises a separate housing (7, 14) for the RPM sensor (6) arranged to fit into and through an opening through a wall of the driving motor housing (3) which opening is arranged in alignment to said excitation device (3), and said separate housing (7, 14) of the RPM sensor (6) is provided with guides (10) slidably displaceably held in elongated slide guides (9) in said block-like unit of the RPM control device such as to be adjustable in the elongated direction of said slide guides (9) during assembly of said tool to the position of said wall opening in the drive motor housing, a flexible cable connecting said separate housing and said block-like unit.