Abstract: The machine for abrasive treatment comprises an abrasive tool (1) and a device for establishing the holding-down force within the machining zone, said device having a housing (3) provided with guideways, wherein poppet sleeves (4) carrying spindles (5) are free to reciprocate so as to translate the holding-down force to the abrasive tool (1), and a feed mechanism (14) located on the housing (3). According to the invention, in the device for establishing the holding-down force the poppet sleeves (4) are interlinked through an elastic member which is regidly coupled to the feed mechanism (14), while the latter mechanism is adapted to damp the travel of the elastic member in the forward and reverse directions of feed.

Abstract: An apparatus for abrasive machining has an annular support (1) and a faceplate (5) which is operatively connected to a drive and is mounted on a thrust bearing (2) for rotation in a radial bearing (8). According to the invention, the faceplate (5) has a coaxial bushing (7) journalled in the radial bearing (8), and the faceplate (5) and the annular support (1) are elastically coupled to each other by means of an axle (9) extending through the bushing (7) and biased by a spring in the direction of preload in the thrust bearing (2), the faceplate (5) being connected to the axle (9) for rotation relative thereto by an auxiliary thrust bearing (12) and having on the outer cylindrical periphery thereof a driven member of the drive, a plane (17) drawn through the middle of width of the driven member (16) of the drive extending through a plane (18) drawn substantially through the middle of width of the radial bearing (8 ).