Abrasive belt grinding machine on wheels for removing welds or grinding large flat surfaces. One speed machine with electrical system equipped with start, stop and emergency button. The head is mounted on a practical trolley with wheels that can be positioned at different points with respect to the contact wheel. The trolley allows you to work with an inclination of 30 ° and remain in a horizontal position for changing the belt. The head is pivoted on the trolley in a balanced position, both in the resting and moving phase and during the processing phase, and is equipped with a limit stop that allows you to adjust the point of contact of the abrasive belt with the work piece. On request, the contact wheel can be equipped with adjustable feeler rollers which, resting on the surface to be worked, ensure constant and uniform removal.