The invention relates to a stop for a rotating drilling, milling or countersinking tool which comprises a stop sleeve which is freely rotatably coupled, by means of a sliding or rolling bearing, around the tool. A first bearing bush of the bearing supports the stop sleeve. A second bearing bush of the bearing sits in a rotationally fixed manner on a shaft sleeve. The shaft sleeve can be pushed and fastened on a shaft of the tool. In a secondary aspect, the invention relates to a drilling, milling or countersinking tool having such a stop.

A method and apparatus for angularly drilling during a tapping procedure into a pressurized multiple strings of coaxially situated tubulars for wells and/or platforms which have overturned wherein the tapping occurs underwater via a diver or remotely operated vehicle.

A guide 2 for a burr cutter 34, the guide 2 comprising: a body portion 4 having first and second guide surfaces 12a, 12b which are spaced from one another to define a slot 14 between the first and second guide surfaces 12a, 12b; a bearing 32a, 32b for rotatably mounting the body portion 4 to a shank 38 of the burr cutter 34 with a cutting head 36 of the burr cutter 34 adjacent the slot 14; wherein the first and second guide surfaces 12a, 12b and the bearing 32a, 32b are positioned relative to one another such that the first and second guide surfaces 12a, 12b are tangential to the cutting head 36 of the burr cutter 34.

A clamping device for releasably holding a tool holder shank includes a spindle rotatably mounted inside a housing, a drawbar axially moveable in a bore in the housing between an advanced releasing position and a retracted locking position, engagement members moveable under the effect of the drawbar into locking engagement with the tool holder shank, an actuating member slidably mounted to the spindle, a motion transferring mechanism for transferring an axial movement of the actuating member into a movement of the drawbar, and a cylinder housing and an associated piston member for moving the actuating member in relation to the spindle. The cylinder housing is arranged in the housing in an axially floating manner. The actuating member is rotatable in relation to the cylinder housing and the piston member together with the spindle.

A quick-release adaptor for a tool for a torque limiter is provided. The quick-release adaptor has a housing having a first opening at a first end and a second opening at a second end. The first opening engages a drive shaft of the torque limiter to axially and rotationally connect the drive shaft to the housing. The second opening receives the tool. A groove is provided on an exterior of the housing between the first end and the second end. At least one through hole extends through the groove and into an interior of the housing. A ball bearing is seated within the through hole. A spring clamp is provided in the groove and extends over the ball bearing to exert a radially inward force on the ball bearing to seat the tool.

A counter bearing for machining spindles of machine tools has at least one expansion bushing with an elastically deformable wall that delimits at least one pressure chamber. The pressure chamber accommodates a pressure medium. A supply line for the pressure medium opens into the pressure chamber. A pressure conduit opens into the pressure chamber. A mechanically actuatable pressure element is disposed in the pressure conduit and actuated by an actuating tool. A piston is slidably arranged in the pressure conduit and actuated by the pressure element, wherein the piston loads the pressure medium.

The invention relates to an axle arrangement (10) for mounting a tool or a workpiece. The axle arrangement (10) comprises a receiving unit (12) that is supported by a swivel bearing assembly (13) in a base body (11) so as to be rotatable about a longitudinal axis L. The receiving unit (12) has a receiving sleeve (18) that is supported so as to be immovable in longitudinal direction R parallel to the longitudinal axis L and has a gripper actuating element (23) that is supported so as to be slidable in the receiving sleeve (18) along the longitudinal axis L. On one end of the gripper actuating element (23) associated with the front end (18a) of the receiving sleeve (18), there is seated a gripper unit (24) for gripping the tool or the workpiece. The gripper unit (24) is pretensioned by a pretension unit (30) in a clamping position I. An actuatable release unit (34) can move the gripper unitcounter the pretension force FV of the pretension unit (30)into a release position II. By means of a support unit (48), an auxiliary bearing (49) that, in particular, is configured as an axial bearing, can be pressed against the receiving sleeve (18) in order to achieve an improved axial force support of the receiving unit (12) on the base body (11) and to reduce the load on the swivel bearing assembly (13) due to axial forces.

[Problem] A chuck device capable of reliable locking with a simple structure is provided. [Solution] A chuck device (1) including a plurality of balls (41); a retainer (42) which holds the balls (41) so as to be rolled; a spring ring (34) configured to rotate together with a nut ring (33) and to switch between a rotation restricted state in which the retainer (42) is restricted in a loosening direction (L) and a restriction released state in which the restriction of the retainer (42) in the loosening direction (L) is released; and a one-way spring (31) which restricts the retainer (42) in the loosening direction (L) relative to a chuck body (11), in which the plurality of balls (41), the retainer (42) and the one-way spring (31) configure a one-way bearing mechanism (50) restricted in the loosening direction (L) provided between the nut ring (33) and the chuck body (11), and the retainer (42) in the rotation restricted state configures a bearing and lock mechanism (30).

The invention relates to a cutting machine with a receiving area for a tube section and with a tool head (1) which can be rotated relative to the receiving area about a longitudinal axis (L), has at least one cutting tool (6) for machining a tube section end (40) of the tube section located in the receiving area, and has a support component (2), wherein the support component faces the receiving area and has an annular component (3) which rotates relative to the support component (2) about the longitudinal axis (L) and is designed to be randomly supported on a tube wall (42, 42) of the tube section end (40). The invention further relates to a corresponding method for reducing vibrations.

Pipe machining apparatuses and methods of operating are provided. In one aspect, a pipe machining apparatus includes an advancement mechanism coupled to a frame and adapted to move relative to the frame between a first position, in which the advancement mechanism is in a travel path of an advancement member and is adapted to be engaged by the advancement member to advance a tool, and a second position, in which the advancement mechanism is positioned out of the travel path of the advancement member and is not adapted to be engaged by the advancement member. In another aspect, a pipe machining apparatus includes multiple motors and pinion gears engaged with a gear rack of a tool carrier. In a further aspect, a pipe machining apparatus includes a race wiper. In yet another aspect, a pipe machining apparatus includes a race lubrication member.