Abstract: A device for centering a longitudinal workpiece fixed on a spindle includes a support body linearly displaced along a support body axis. The support body and support body axis are aligned substantially parallel to an axis of rotation of the spindle. A first support element movably arranged on the body supports the workpiece or a workpiece receiving part, and a second support element movably arranged on the body supports the workpiece or a workpiece receiving part. The first support element can be linearly displaced in a first direction and is rotatably arranged about a first axis of rotation on the support body and the second support element can be linearly displaced in a second direction different from the first direction and is rotatably arranged about a second axis of rotation on the support body.

Abstract: Disclosed is a device for workpiece centring for a longitudinal workpiece (2) that is fixed on a spindle (1), comprising a support body (11, 47, 73, 103), which can be linearly displaced along a support body axis (7), wherein the support body (11, 47, 73, 103) and the support body axis (7) can be aligned substantially parallel to an axis of rotation (8) of the spindle (1), a first support element (9, 45, 71, 91, 111) which is movably arranged on the body and which supports, from a first side, the workpiece (2) or a workpiece receiving part (60) that receives the workpiece (2), and a second support element (10, 46, 72, 92, 112) which is movably arranged on the body and which supports, from a second side, the workpiece (2) or a workpiece receiving part (60) that receives the workpiece (2), wherein the first support element (9, 45, 71, 91, 111) can be linearly displaced in a first direction of displacement (23, 48) and is rotatably arranged about a first axis of rotation (23a, 48a) on the support body (11, 47, 7

Abstract: The component to be machined (2) is fixed with its axis in a position exactly determined in relation to the machine base (1) and the seat (3), by means of the sides (8) and the rear face (9) of the vee arranged on the seat and by means of the intermediate organ (11) in the form of a sector of ring, the concave cylindrical facets (23) of which are adapted to the component (2). The component (2) is pressed against the facets (23) by the finger (14) operated by the stirrup (15). The component (2) can be driven in rotation by a floating spindle operated by a servomotor into a position determined in relation to the machine seat (1).

Abstract: The part to be machined (2) is attached so that its axis lies in a position exactly determined relative to the base of the machine (1) and to the pedestal (3) due to the flanges (8) and the rear face (9) of the V formed on the pedestal, and due to an intermediate member (11) having the shape of a crown sector in which the concave cylindrical faces (23) are adapted to the part (2). The part is pressed against the faces (23) by a lug (14) actuated by the calliper (15). The part (2) can be rotated by a floating pin actuated by a servomotor in a determined position relative to the base of the machine (1).

Abstract: According to the invention, the pin (6) is rotated by the motor (5) via the belt (10) and the pulley (11) that is precision-held on the fixed bushing (13). It comprises a pin arm (16) whose solid rear portion (20) rotates in the bushing (13) and is coupled by screws (18), and the centring part (19) at the inner area of the pseudo universal-joint disk (17) whose outer area is coupled to the pulley (11). A second pseudo universal-joint connection is provided between the rear portion (20) of the pin arm (16) and the front portion thereof (21), which is connected to the clamp-holding bushing (7) in which the clamping collet (8) is mounted.

Abstract: The present invention relates to a quick connection device for driving various rotary tools by use of a drive shaft surrounded by a housing. Each tool includes a shank with a groove and a coupling projection. A rotary tool holder tube is mounted on bearings in a supporting tube and is provided with a first quick connection snap coupling which includes balls surrounded by a resilient sleeve and which are capable of engaging the groove in the tool shank. The shank is coupled to the drive shaft by the coupling projection and a slot in the drive shaft. Engagement of the second quick connection coupling joining the supporting tube to the housing simultaneously blocks the resilient sleeve. The quick connection coupling device is used in a surgical instrument which enables a variety of rotary cutting tools to be operated at varying distances from the drive shaft by use of a set of intermediate spindles of various lengths having the same structure as the quick connection device.