Turbine for a machine for projecting abrasive for the surface treatment of objects, wherein the turbine comprises a turbine wheel rotatable in a rotation direction about a central axis, the turbine wheel comprising: - a first flange and a second flange, wherein at least one of the flanges is provided with a supply opening along which the abrasive can be supplied; - at least one blade element arranged between the first and second flanges (11, 12) and provided with a guide surface for receiving, guiding and projecting the abrasive supplied via the supply opening; - a mounting system for releasable mounting of the blade element, characterized in that the mounting system comprises: - a support element through which the at least one blade element is mounted on the flanges (11,12) and which is arranged between the blade element and the flanges (11, 12) and which is mounted releasably on the blade element and on each of the flanges, wherein the support element is arranged at a position behind the blade element as seen in the rotation direction and is embodied to support the blade element between the flanges, over substantially the whole width of the at least one blade element, or at least over a part of the overall width of the at least one blade element in a central area of the at least one blade element. the turbine wheel comprising: - a first flange and a second flange, wherein at least one of the flanges is provided with a supply opening along which the abrasive can be supplied; - at least one blade element arranged between the first and second flanges (11, 12) and provided with a guide surface for receiving, guiding and projecting the abrasive supplied via the supply opening; - a mounting system for releasable mounting of the blade element, characterized in that the mounting system comprises: - a support element through which the at least one blade element is mounted on the flanges (11,12) and which is arranged between the blade element and the flanges (11, 12) and which is mounted releasably on the blade element and on each of the flanges, - a first flange and a second flange, wherein at least one of the flanges is provided with a supply opening along which the abrasive can be supplied; - at least one blade element arranged between the first and second flanges (11, 12) and provided with a guide surface for receiving, guiding and projecting the abrasive supplied via the supply opening; - a mounting system for releasable mounting of the blade element, characterized in that the mounting system comprises: - a support element through which the at least one blade element is mounted on the flanges (11,12) and which is arranged between the blade element and the flanges (11, 12) and which is mounted releasably on the blade element and on each of the flanges, - a support element through which the at least one blade element is mounted on the flanges (11,12) and which is arranged between the blade element and the flanges (11, 12) and which is mounted releasably on the blade element and on each of the flanges, wherein the support element is arranged at a position behind the blade element as seen in the rotation direction and is embodied to support the blade element between the flanges, over substantially the whole width of the at least one blade element, or at least over a part of the overall width of the at least one blade element in a central area of the at least one blade element.