A cutting tool includes a hole saw, a pilot bit, and an arbor assembly. The arbor assembly includes a shank, a body, a first engagement member moveable relative to the shank, the first engagement member engaging the hole saw to releasably secure the hole saw to the shank, and a second engagement member moveable relative to the shank, the second engagement member engaging the pilot bit to releasably secure the pilot bit to the shank. The body is moveable to a first position where the hole saw and the pilot bit are secured to the arbor assembly, to a second position where the first engagement member disengages the hole saw, allowing removal of the hole saw from the shank, and to a third position where the second engagement member disengages the pilot bit, allowing removal of the pilot bit from the shank.

A drilling tool, in particular a rock drill, extends along a longitudinal axis and includes a drill head, an insertion end, a main body, a sleeve element, a conveying portion arranged between the drill head and the insertion end, and at least one conduit that extends along the conveying portion. The conduit is located radially between the sleeve element and the main body. The sleeve element is rotatably mounted on the main body.

A cutting tool includes a hole saw, a pilot bit, and an arbor assembly. The arbor assembly includes a shank, a sleeve, a first ball bearing moveable relative to the shank, the first ball bearing engaging the hole saw to releasably secure the hole saw to the shank, and a second ball bearing moveable relative to the shank, the second ball bearing engaging the pilot bit to releasably secure the pilot bit to the shank. The sleeve is moveable to a first position where the hole saw and the pilot bit are secured to the arbor assembly, to a second position where the first ball bearing disengages the hole saw, allowing removal of the hole saw from the shank, and to a third position where the second ball bearing disengages the pilot bit, allowing removal of the pilot bit from the shank.

There is provided a drill tool assembly for drilling metallic or other materials, comprising a holder having a mounting slot in which a cutting insert is positioned, and a through tool coolant supply system. The drilling tool system allows for the application of coolant to the rake surfaces of the cutting insert in a manner which facilitates enabling higher penetration rates while maintaining integrity of the cutting edges of the cutting insert. The drilling tool system comprises a holder having a rotational axis and mounting slot. A cutting insert with sides positioned adjacent the side surfaces of the mounting slot and cutting edges extending from the rotational axis is mounted in the slot. The insert includes rake surfaces adjacent the cutting edges that are positioned above the mounting slot. At least one coolant channel is disposed with at least one coolant outlet directed at the sides of the insert at a position below the rake surfaces. The coolant outlet is configured to disperse coolant in a curtain across the entire rake face of each cutting edge.

A drilling tool includes a cutting part and a clamping part. The cutting part includes a cutting portion and a connecting portion connected to a lower end of the cutting portion. The connecting portion has an outer peripheral surface, and the clamping part has an inner peripheral surface. A recess of the outer peripheral surface is spirally twisted into a protrusion of the inner peripheral surface in a direction of a central axis. In the process of clamping the cutting part on the clamping part, the outer peripheral surface and the inner peripheral surface fit together with a varying interference amount λ, which meets the following requirements: −0.1 mm≤λ≤0.05 mm.

A drill bit for chiselling rock includes an impact face at an insertion end of the drill bit, a hollow shank, where a delivery passage is defined within the hollow shank, and a drill head, where the drill head has, at a front end of the drill head, a plurality of cutting faces, an intake opening, and an intake passage. The intake passage connects the intake opening to the delivery passage. The intake opening has a noncircular cross section.

A cutting head rotatable about a first axis, has a cap portion and a rigid mounting protuberance joined thereto. The cap portion has a plurality of cutting portions circumferentially alternating with a plurality of head chip flutes, and a head base surface facing in an axial rearward direction. The mounting protuberance exhibits rotational symmetry about the first axis, extends axially rearwardly from the head base surface, and has a plurality of circumferentially spaced apart convex clamping surfaces. The plurality of cutting portions define a cutting diameter, the plurality of head chip flutes are inscribed by an imaginary first circle having a first diameter, and the plurality of clamping surfaces are circumscribed by an imaginary second circle having a second diameter. The first diameter is greater than the second diameter, and the second diameter is less than forty percent of the cutting diameter.

A rotary tool, comprising: a tool main body comprising a clamping section and a tool head; an exchangeable first cutting insert having at least one first cutting region having a first cutting edge, wherein the first cutting insert can be inserted into an insert groove of the tool main body from the front side of the tool head and can be fastened therein in a rotationally fixed manner; and an exchangeable second cutting insert fastened to the tool head and offset toward the clamping section in the axial direction of the rotary tool relative to the first cutting insert and which has an insert main body and at least one second cutting region having at least one second cutting edge. A fastening means for the second cutting insert is arranged in the insert groove of the first cutting insert. Also, a cutting insert set and a tool main-body set.

A cutting insert includes a head portion having a number of cutting edges and a centering pin which is disposed about a central longitudinal axis and which is coupled to, and extends axially away from, the main head portion. The centering pin includes a recess structured to accommodate a portion of a setscrew. The recess includes: a first angled surface disposed generally facing away from a leading end of the centering pin at an acute first angle with respect to the longitudinal axis of the centering pin; and a second angled surface which is positioned opposing the first angled surface at an acute second angle with respect to the longitudinal axis of the centering pin.

A rotary cutting tool includes a tool body including a chip flute portion having a plurality of helical chip flutes separated by lobes. In one aspect, a tunable vibration absorber assembly is disposed within a cavity formed in the chip flute portion. In another aspect, the tunable vibration absorber assembly is disposed within a cavity of a replaceable cutting head. In each aspect, the tunable vibration absorber assembly includes one or more tunable absorber masses, a resilient material between the one or more absorber masses and the cavity, and one or more connecting members for preventing relative angular displacement of the one or more tunable absorber masses. The one or more tunable absorber masses are suspended only by the resilient material, thereby enabling the tunable vibration absorber assembly to be tuned to a desired frequency for suppressing torsional vibration of the rotary cutting tool during a cutting operation.