A form roll of hard material, such as cemented tungsten carbide, for example, is mounted on a driving shaft. A bar-like key engages a hole in the shaft and notches in the roll and is engaged by a screw which clamps the key to the roll. A split sleeve is forced between a cylindrical central bore in the roll and a tapered portion on the shaft which the roll surrounds.
Assembly (12) to clamp a rolling ring (10) associated with a ring-bearing shaft (11) of a rolling mill stand, the clamping assembly (12) comprising a labyrinth ring (13), an alignment bush (18), a cap (15), a spacer (14), a closure flange (16) and a locking screw (17), means (30, 31) performing rotational clamping by frontal coupling being included between the cap (15) and the rolling ring (10), the spacer (14) having a frontal abutment (33) against the cap (15) and abutment means (40) against the rolling ring (10) and being associated axially with the cap (15) by means of key means (23), the key means (23) cooperating with seatings (25) provided in the spacer (14) in a longitudinally sliding manner, the spacer (14) defining a first gap (29a) of a required width between the opposed surfaces of the cap (15) and of the rolling ring (10) and a second gap (29b) between the means (30, 31) performing rotational clamping by frontal coupling.
The invention concerns expandable fastenings of the kind that includes a conical shaft part (2) and a conical expandable sleeve (4) that is pressed up on the conical part (2) of the shaft (1) in order to fill out and fasten the shaft in a mounting hole. The expandable sleeve (4) is pressed against the cone by a washer (5) and by a nut (11) screwed onto a threaded end portion of the shaft. The washer (5) is on its outside provided with a thread for the threading thereon of a nut part or sealing ring (6). The expandable sleeve (4) and the threaded washer (5) are connected by hooklike flanges so that the sealing ring (6) can also be used to pull out the sleeve from the conical axle part.
