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 cross hole deburring tool which performs rotary cutting on a cross hole burr occurring on a cross ridgeline part between a through path and an inner circumferential surface of a spherically-shaped hollow part. A tool main body includes a tip part and a shank, and the tip part has a shape obtained by setting a diameter axis of a circle, setting an eccentric axis parallel to the diameter axis and away therefrom by a predetermined eccentric distance, setting a closed region in a bow shape formed of a line segment obtained by cutting the eccentric axis by the circle and a minor arc on the circle by defining this line segment as a chord, setting an outer surface shape of a bow-shaped solid of revolution formed by rotating this bow shape about the eccentric axis, and taking this outer surface shape as the shape of the tip part.

A disposable chamfering blade is provided with a mounting hole through which the disposable chamfering blade can be locked to a cutter body. One end of the disposable chamfering blade is provided with a conical cutter head whose conical periphery is circumferentially provided with a plurality of chip removing grooves. Each chip removing groove has a side face formed as a cutting edge such that the disposable chamfering blade is formed with a plurality of cutting edges for continuous cutting.

A deburring tool (7) for deburring of edges of transverse recesses (3, 3a-i), which diverge from a main borehole (2), consisting of a shaft (8, 9) driven to turn about the tool axis (11), which is deployable and retractable in the forward feed direction into the main borehole, and on the lower end of which at least one knife window (26) is arranged, in which at least one spring-loaded knife (10, 10′, 10″, 10′″, 10″″) is arranged roughly perpendicular to the tool axis (11), so as to be shiftable, which on its front end has at least one cutting edge (10a, 10b) which encounters the edge of the transverse recess (3, 3a-i), and deburrs same, wherein the knife (10, 10′, 10″, 10′″, 10″″) consists of two cutting edges (10a, 10b) opposite in the rotational direction (12, 13), which act to cut equally for the right and left passes (12, 13), with one cutting edge (10a) being configured to cut for the rightward pass (12), both in forward motion (38a) and in rearward motion, and the other cutting edge (10b), being configured to cut for the leftward pass (13), both in forward motion (38a) and in rearward motion, and that the two cutters (10a, 10b) with their cutting edges are placed at a slant and with arch shape at an angle between 0° and 90°, but preferably between 5° and 45° to the tool axis (11) and thus to the longitudinal axis (2a) of the main borehole (2).

A deburring tool (10) for deburring at least one through-hole (24) in a workpiece, the surface (38) of the through-hole (24) to be deburred located on the side away from the deburring tool (10), the tool comprising a main body (12) with a tool shaft (14) and a tool head (16), the tool shaft (14) having a clamping section (16) and the tool head (16) having a guide section (20) with a guide sleeve (22) extending along or parallel to an axis of rotation (36). The tool head (16) comprises at least one flexible fibre (26) with an abrasive surface (28), which is permanently or detachably attached in the guide sleeve (22), the fibre (26) having a free length (L1) and the guide sleeve (22) having a length (L2), the free length (L1) and/or the length (L2) corresponding to at least the depth (T) of the through-hole (24).

A device for detaching a burr from an opening of a transverse borehole of a workpiece includes an elongate shank for positioning in a longitudinal borehole of the workpiece and a fillet to avoid the elongate shank colliding with a drill for drilling the transverse borehole. In an example embodiment, the device has an aperture to further avoid the elongate shank colliding with the drill. In an example embodiment, the elongate shank has a cutting section with a cutting edge for detaching the burr from the opening of the transverse borehole.

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.

Cutting tool, which is driven with its shaft so that it rotates about its longitudinal axis or in a pushing and pulling manner, and wherein further shaft-side secondary cutting tools are fastened to the shaft, wherein the secondary cutting tools are fastened to the shaft of the cutting tool in an exchangeable manner.

A deburring tool (7) for deburring of edges of transverse recesses (3, 3a-i), which diverge from a main borehole (2), consisting of a shaft (8, 9) driven to turn about the tool axis (11), which is deployable and retractable in the forward feed direction into the main borehole, and on the lower end of which at least one knife window (26) is arranged, in which at least one spring-loaded knife (10, 10, 10, 10, 10) is arranged roughly perpendicular to the tool axis (11), so as to be shiftable, which on its front end has at least one cutting edge (10a, 10b) which encounters the edge of the transverse recess (3, 3a-i), and deburrs same, wherein the knife (10, 10, 10, 10, 10) consists of two cutting edges (10a, 10b) opposite in the rotational direction (12, 13), which act to cut equally for the right and left passes (12, 13), with one cutting edge (10a) being configured to cut for the rightward pass (12), both in forward motion (38a) and in rearward motion, and the other cutting edge (10b), being configured to cut for the leftward pass (13), both in forward motion (38a) and in rearward motion, and that the two cutters (10a, 10b) with their cutting edges are placed at a slant and with arch shape at an angle between 0 and 90, but preferably between 5 and 45 to the tool axis (11) and thus to the longitudinal axis (2a) of the main borehole (2).

A drill for drilling a blind hole having a blind hole diameter and a blind hole depth in a metal workpiece is provided, the drill comprising a shaft, defining a drilling direction, and a rotation axis oriented in the drilling direction, the shaft having, on an end pointing in the drilling direction, a cutting edge and a stop shoulder at a distance from the cutting edge which defines the blind hole depth, wherein the cutting edge defines the blind hole diameter by rotating about the rotation axis, the shaft having an enveloping circle diameter which changes along the rotation axis and which is larger than the blind hole diameter on the stop shoulder, the shaft having a first shaft section arranged between the cutting edge and the stop shoulder which reaches to the stop shoulder and in which the enveloping circle diameter is smaller than the blind hole diameter.