Apparatus for abrasive machining

An apparatus for abrasive machining comprising an annular support (1) carrying a thrust bearing (2) and a faceplate (5;25) operatively connected to a drive and carrying an abrasive tool (6), the faceplate being mounted by means of the thrust bearing (2) for rotation in a radial bearing (8;31) provided inside the annular support (1), characterized in that the faceplate (5;25) has a coaxial bushing (7;24) provided on its inner end face and journalled in the radial bearing (8;31), and in that the faceplate (5;25) and the annular support (1) are elastically coupled to each other by means of an axle (9) having a shoulder (10;28) at one end thereof and a threaded portion (11) and a nut (15) at the other end thereof, the axle extending through the bushing (7;24) and a central hole of the annular support (1) and being spring-biased in the direction of preload in the thrust bearing (2), the faceplate (5;25) being connected to the axle (9) for rotation relative thereto by means of an auxiliary thrust bearing (12;26) and having a driven member (16;36) of the drive on the outer cylindrical periphery thereof, a plane (17;37) drawn through the middle of width of the driven member extending in a plane (18) drawn substantially through the middle of width of the radial bearing (8).