Abstract: A rotary floor machine having a base, a pole handle, a pole structure, a handlebar, a trigger bar, and a lock-out device. The pole handle is pivotally secured to the base and is movable between a vertical position and a rear angular position. The pole structure is secured to the pole handle. The handlebar is secured to the pole structure so as to be substantially perpendicular to the pole handle. The trigger bar controls the starting and stopping of the rotary floor machine and is mounted to the handlebar so as to be movable between proximate and distal positions relative to the handlebar. The trigger bar starts the rotary floor machine when in the proximate position and stops the rotary floor machine when in the distal position. The lock-out device has an element that is movable between a blocking position and an un-blocking position in response to movement of the pole handle between the vertical position and the rear angular position.