A boring head (1) with an electronic unit (20) integrated in the boring head (1) is provided, the electronic unit (20) comprising a control unit (60), a display (30) and a compartment (26) for a power source (41). The display (30) is connected to the control unit (60) and serves to display information concerning the status of the boring head (1) to a user. The compartment (26) serves to accommodate a power source (41) to supply the control unit (60) and the display (30) with electric power. The electronic unit (20) as a whole is designed as a compact subassembly of the boring head (1).

A rotatable tool for producing a circular groove through metal cutting in a metal work piece and a method of forming the circular groove with the rotatable tool is disclosed. The rotatable tool includes a front end and a second end. The front end includes a first radially outer cutting edge and a second radially inner cutting edge, where the first radially outer cutting edge is located at a larger radial distance from the tool center axis than any other cutting edge of the rotatable tool, and where the second radially inner cutting edge is located at a smaller radial distance from the tool center axis than any other cutting edge of the rotatable 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.

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).

There is described a facing accessory for a portable boring apparatus, the accessory comprising: a shaft mounting portion for mounting to a longitudinal shaft of the portable boring apparatus extending along a longitudinal axis; a tool holder secured to the shaft mounting portion and adapted to receive a facing tool thereon, the tool holder comprising at least a telescopic arm for enabling movement of the facing tool towards and away from the shaft mounting portion along a radial axis relative to the longitudinal shaft; and an actuator operatively connected to the second section of the telescopic section for translating the second section relative to the first section along the radial axis.

A boring head for fixing a boring tool includes a main body mounted to a rotatable tool holder, a piston being received within and movable with respect to the main body in a radial direction, wherein a circumferential surface of the piston has a flat face parallel with the radial direction, and a combined orientation and fixation device for orienting and fixing the piston with respect to the main body. The combined orientation and fixation device includes a blind sleeve mounted in the main body, a flexible end wall of the blind sleeve facing the flat face of the piston, and a tightening screw configured for engagement with the blind sleeve so that the flexible end wall presses against the flat face when the tightening screw is tightened to press the piston against the main body and to simultaneously orient and fix the piston with respect to the main body.

There is described a facing accessory for a portable boring apparatus, the accessory comprising: a shaft mounting portion for mounting to a longitudinal shaft of the portable boring apparatus extending along a longitudinal axis; a tool holder secured to the shaft mounting portion and adapted to receive a facing tool thereon, the tool holder comprising at least a telescopic arm for enabling movement of the facing tool towards and away from the shaft mounting portion along a radial axis relative to the longitudinal shaft; and an actuator operatively connected to the second section of the telescopic section for translating the second section relative to the first section along the radial axis.

A boring head (1) with an electronic unit (20) integrated in the boring head (1) is provided, the electronic unit (20) comprising a control unit (60), a display (30) and a compartment (26) for a power source (41). The display (30) is connected to the control unit (60) and serves to display information concerning the status of the boring head (1) to a user. The compartment (26) serves to accommodate a power source (41) to supply the control unit (60) and the display (30) with electric power. The electronic unit (20) as a whole is designed as a compact subassembly of the boring head (1).

A cutting tool includes a main body suitable to be mounted pivotably about an axis of rotation. A cutting head is carried by a carrying member. The carrying member is mounted displaceably in translation on the main body along an axis perpendicular to the axis of rotation. A counterweight is displaceably mounted in translation on the main body along an axis perpendicular to the axis of rotation. The cutting tool also includes an adjusting spindle for the simultaneous adjustment of the carrying member with respect to the counterweight, arranged on either side of the axis of rotation of the main body.

A boring bar head body is disclosed. An example boring bar head includes a front face, an attachment face opposed to the front face, and an axis substantially perpendicular to the front face and attachment face. The attachment face is operably connected to a boring bar. The front face includes a low plane, a high plane, and an insert groove in between at least a portion of the high and low planes. In the insert groove there is at least one cutting insert that has a cutting surface and a bottom surface. The cutting insert is removably attached to the insert groove.