Rotational construction laser

The rotational laser (1) has a housing (17) containing a laser unit (4), providing a laser beam (2) which is rotated over at least a segment within a rotational plane (R) via a deflection device (5) contained within a rotation unit (6) and rotated about a perpendicular axis (A), intersecting the beam axis (S) of the laser beam. The deflection device is positioned at the centre point (M) of a spherical pivot mounting (7,8) supporting the deflection device within a mounting frame (3).