A base frame or motor rocker, wherein a first supporting surface (26, 27) for a motor is provided, and a second supporting surface (24, 25) for a gear mechanism is provided, wherein the supporting surfaces (24, 25, 26, 27) are formed by non-machined semi-finished products (6, 10, 11, 22) and wherein the first supporting surface (26, 27) is surrounded by a first spacer part (51, 52) and the second supporting surface (24, 25) is surrounded by a second spacer part (51, 52), wherein both spacer parts (51, 52) are produced from non-machined semi-finished products (6, 10, 11, 22) by cutting into lengths and both spacer parts (51, 52) are joined by a material-formed bond to a profile tube (32, 50) by a join, wherein in at least one spacer part (52, 74) at least one compensation element (42, 54) placed in a cavity formed by adjoining surfaces, preferably a shim or similar sheet-metal piece, or a cavity is arranged between the spacer part (52, 74) and the profile tube (32, 50), wherein the cavity is closed off by the material-formed join at least partially towards the outside, preferably at least in portions or completely on all the open sides of the cavity, characterised in that the material-formed join is formed by at least one weld seam, and the weld seam does not directly contact the compensation element (42, 54), wherein the join is the join of a first part (18, 19, 52, 74) to a second part (32, 50), - so that either the first part (18, 19, 52, 74) is joined to the second part (32, 50) by a material-formed bond, wherein a spacing is maintained between the first part (18, 19, 52, 74) and the second part (32, 50), which is bridged by the material-formed join, the spacing is filled by a compensation element (42, 54), and the material-formed join is formed by at least one weld seam which at least partially surrounds the compensation element (42, 54) or a cavity which fills the spacing, wherein the weld seam is guided entirely or in portions around the compensation element (42, 54), in particular is guided such that the compensation element (42, 54) cannot drop out, and that the weld seam does not directly contact the compensation element (42, 54) - or that the first part (18, 19, 52, 74) is joined to the second part (32, 50) by a material-formed bond, wherein a spacing is maintained between the first part (18, 19, 52, 74) and the second part (32, 50) which is bridged by the material-formed join, the spacing being filled by a compensation element (42, 54), preferably a shim or similar sheet-metal piece, and the material-formed join is formed by at least one weld seam which at least partially surrounds the compensation element (42, 54) or a cavity which fills the spacing, wherein the weld seam does not join the first part (18, 19, 52, 74) to the compensation element (42, 54) and does not join the second part (32, 50) to the compensation element (42, 54) and does not touch the compensation element (42, 54), - or that the first part (18, 19, 52, 74) is joined to the second part (32, 50) by a material-formed bond, wherein a spacing is maintained between the first part (18, 19, 52, 74) and the second part (32, 50) which is bridged by the material-formed join, wherein the spacing is filled by a compensation element (42, 54), preferably a shim or similar sheet-metal piece, wherein the compensation element (42, 54) does not consist of a slag-forming material, of materials with a high melting point which are not melted by a welding arc, or copper in the form of a water-cooled pipe [sic], and the material-formed join is formed by at least one weld seam which surrounds the compensation element (42, 54) or a cavity filling the spacing at least partially, preferably at least in portions on all the open sides of the cavity, and which does not directly contact the compensation element (42, 54). - so that either the first part (18, 19, 52, 74) is joined to the second part (32, 50) by a material-formed bond, wherein a spacing is maintained between the first part (18, 19, 52, 74) and the second part (32, 50), which is bridged by the material-formed join, the spacing is filled by a compensation element (42, 54), and the material-formed join is formed by at least one weld seam which at least partially surrounds the compensation element (42, 54) or a cavity which fills the spacing, wherein the weld seam is guided entirely or in portions around the compensation element (42, 54), in particular is guided such that the compensation element (42, 54) cannot drop out, and that the weld seam does not directly contact the compensation element (42, 54) - or that the first part (18, 19, 52, 74) is joined to the second part (32, 50) by a material-formed bond, wherein a spacing is maintained between the first part (18, 19, 52, 74) and the second part (32, 50) which is bridged by the material-formed join, the spacing being filled by a compensation element (42, 54), preferably a shim or similar sheet-metal piece, and the material-formed join is formed by at least one weld seam which at least partially surrounds the compensation element (42, 54) or a cavity which fills the spacing, wherein the weld seam does not join the first part (18, 19, 52, 74) to the compensation element (42, 54) and does not join the second part (32, 50) to the compensation element (42, 54) and does not touch the compensation element (42, 54), - or that the first part (18, 19, 52, 74) is joined to the second part (32, 50) by a material-formed bond,