Provided is cutting tool. The tool, in certain examples, includes a drill body that defines a drill axis, and a tool window formed in the drill body. The tool also includes a drill bit extending from the drill body, and a material reworking attachment (“MRA”) coupled to the drill body and storable within the tool window. The MRA is extendable from a stored position into either a surface-finishing position or a material-removal position. The MRA includes a first chamfering blade, a second chamfering blade, and a finishing surface interposed between the chamfering blades. The tool also includes a position manager to detect a position of the cutting tool with reference to a workpiece, and an actuator to transition the MRA from the stored position to the material-removal position, followed by a transition to the surface-finishing position, and followed by a transition to material-removal position.

Provided is cutting tool. The tool, in certain examples, includes a drill body that defines a drill axis, and a tool window formed in the drill body. The tool also includes a drill bit extending from the drill body, and a material reworking attachment (MRA) coupled to the drill body and storable within the tool window. The MRA is extendable from a stored position into either a surface-finishing position or a material-removal position. The MRA includes a first chamfering blade, a second chamfering blade, and a finishing surface interposed between the chamfering blades. The tool also includes a position manager to detect a position of the cutting tool with reference to a workpiece, and an actuator to transition the MRA from the stored position to the material-removal position, followed by a transition to the surface-finishing position, and followed by a transition to material-removal position.

The invention relates to a cutting tool comprising a main part that can be rotationally driven about a rotational axis, at least one cutting insert holder mounted on the main part such that it can be radially adjusted, and an adjusting device for adjusting the position of the cutting insert holder relative to the main part. The cutting insert holder is mounted in a guide recess in the main part such that it can be moved transversely, preferably radially, to the rotational axis, and the adjusting device has a control rod that is arranged axially movable inside the main part and supports the cutting insert holder. The cutting tool can be of the multi-point cutting tool type. The invention also relates to a method for machining a bearing tunnel by means of such a multi-point cutting tool.

The invention relates to a cutting tool comprising a main part which extends along a longitudinal center axis or rotational axis, at least one cutting insert holder mounted on the main part such that it can be radially adjusted, and an adjusting device for adjusting the position of the cutting insert holder relative to the main part. The adjusting device comprises a threaded sleeve which is non-rotatably but axially movably mounted in the main part and a screw drive driving the threaded sleeve.

An actuatable boring bar is configured to place a cutting insert cartridge received onto the boring bar in a cutting position when the centrifugal force generated by the rotation of the boring bar about the rotation axis reaches a centrifugal force threshold and in a non-cutting position when the centrifugal force generated by the rotation of the boring bar about the rotation axis is below the centrifugal force threshold. The boring bar is further configured so that the cutting insert cartridge can be set-up onto the boring bar in the cutting position.

There is provided a undercutting boring tool (10) comprising a bar body (11). A lost motion link consists of a spring (26) selectively compressed by a lost motion rod (27) having a lost motion slot (33) spaced from a drive pin (34). An operating rod portion (36) has a trunnion body (37) at its front end having a pin (41) adapted to engage the lost motion slot (33). A tool carrier (42) forms a pair of spaced flat tines (43) and forms a bearing surface (44) in the bight. The upper tine (43) and the bearing surface (44) section are slotted at (45) to allow the passage of a control link (46). Apertures (47) in the tines (43) engage pins (50) on the trunnion body (37). The bar of a generally H-shaped tool assembly (52) comprises a bearing surface (53) running in the bearing surface (44). A crank portion (54) is connected to the control link (46) via crank pin (55). Drive pins (61) and (62) engage the tool assembly (52) with the end face of the bar body (11) providing positive engagement resisting rotational forces in use. The arrangement allows for post-insertion rotation of the tool assembly (52) from an aligned to a transverse (working) position before engagement of the drive pins (61) and (62).

The technical objective of the present invention is to provide a cutting insert cooling device capable of easily mounting a spraying member to a cutting tool while preventing the rotation thereof and eliminating the risk of losing a screw. To this end, the cutting insert cooling device according to the present invention, capable of spraying cooling water toward the cutting insert coupled to the cutting tool, comprises: a head part which forms the terminal end portion of the cutting tool and has a cooling water guide flow path part, and to which the cutting insert is coupled; a spraying member having a cooling water spouting flow path part to spray, toward the cutting insert, the cooling water guided through the cooling water guide flow path part; and an attaching and detaching unit that slides the spraying member to the head part so as to attach and detach the same.

A machining tool for deburring boreholes, which lead laterally into a recess, comprising: a shaft; a cutting head with at least one circumferential cutting blade associated with a chip groove and having a cutting edge extending, at least in sections, in an axial direction, and which can perform a cutting process by virtue of relative movement between the tool and a workpiece, and which lies on a virtual cylindrical rotation surface; and at least one cutting-blade-free and chip-groove-free surface area; at least one fluid channel closed on the cutting head side, extending through the shaft into the cutting head; and at least one branch channel with an outlet opening. The outlet opening is in a dynamic pressure active surface radially set back relative to the virtual rotation surface, and is larger than a flow cross-sectional area of the at least one branch channel at the outlet opening.

A cutting tool holding mechanism for detachably holding a cutting tool includes: a collet chuck configured to clamp and unclamp the cutting tool; a piston disposed deeper on the proximal side of the spindle than the collet chuck and configured to urge the collet chuck by the pressure of a fluid supplied from the proximal side of the spindle in the direction from the proximal side toward the distal end side of the spindle so that the collet chuck unclamps the cutting tool; a spool valve provided in the piston and configured to open thanks to centrifugal force at the time when the spindle is turned, so as to supply the fluid fed from the spindle side to the cutting tool.

A rotation tool is mounted to a spindle of a machine tool. The rotation tool comprises a cutter holding portion to which blade portion is fixed and a fixing device which fixes a workpiece. The blade portion is disposed at a tip end of the cutter holding portion. The fixing device includes a movement portion formed to be movable in the interior of the cutter holding portion and a pressing device which presses the movement portion to a side toward the workpiece. The fixing device includes a shaft portion rotatably supported relative to the movement portion and a pressing portion which presses the workpiece.