A cutting tool body includes a first member and a second member, both having a substantially cylindrical shape, and arranged such that a tool body central axis coincides with a central axis of each of the first and the second members. The first member has a tool characteristic of a first magnitude and the second member has the tool characteristic of a second magnitude, different from the first magnitude. The cutting tool body includes a transition member arranged between the first and second members and connected at a first end to the first member and at a second end to the second member. The tool characteristic in the transition member is of the first magnitude at the first end and of the second magnitude at the second end. The transition member has a transition region between the first and the second ends in which the tool characteristic transforms from the first magnitude to the second magnitude.

The whirling device comprises a retaining ring extending around a ring axis and a central opening and having at least one receiving area for a machining element for machining rod-shaped material in the area of the central opening. A coolant supply comprises a supply sleeve which is arranged on the retaining ring via a rotary bearing and comprises a coolant connection and a supply area adjoining a connection area of the retaining ring. Starting from at least one inlet opening in the connection area of the retaining ring, at least one passage leads through the retaining ring to at least one outlet opening which faces the central opening of the retaining ring and is designed for a machining element in a receiving area. No space is required for the coolant supply between the retaining ring and an assigned lathe.

A thread former includes a shank and a forming section having a polygonal cross-section. A ridge or a plurality of ridges of the thread former extend along the circumference of the forming section that has at least two axially adjacent ridges and/or interruptions. In order to provide a thread former in which the wear is further reduced and the machining speed or the number of manufactured tapped holes can be further increased without increasing the wear or even with the reduction of wear, there is suggested that on axially adjacent ridge sections at least some of the interruptions are arranged at different angular positions.

The present invention relates to a threading tool for producing a thread notch on a workpiece. The production may be both material-removing production and also chipless production. The threading tool comprises at least two regions, a distal machining region with a machining head, and a proximal shank region with a shank, which shank narrows toward the machining region via a shoulder. Furthermore, the threading tool according to the invention is designed such that at least one fluid duct extends through the shank, which at least one fluid duct opens out in the machining region.

The invention relates to a thread forming tool having a thread part based on a helical effective surface (1), and an adjoining clamping shank (2), wherein the helical effective surface (1) is formed by pressing lobes (5) and the thread part extends from a chamfer or taper (6) in the direction of the clamping shank (2). Furthermore, at least one axially oriented, groove-like cooling channel (7) that runs between the pressing lobes (5) and extends from the chamfer or taper (6) to the clamping shank (2) is provided. According to the invention, the width of the at least one cooling channel (7) increases from the chamfer (6) in the direction of the clamping shank (2).

In one aspect, thread forming taps are described herein. In some embodiments a thread forming tap comprises a shank disposed at a first end adapted to engage a tool holder and an elongated working portion disposed at a second end. The working portion comprises at least one helical thread and a plurality of longitudinally-extending linear grooves. The longitudinally-extending linear grooves intersect the helical thread forming a plurality of lobes, wherein adjacent lobes differ from one another in relief type and/or relief rate.

A tool for machining a wall of a workpiece, made from a composite material, that can cut a groove in the wall, the tool including a head mounted integrally with a rod having a longitudinal axis and capable of being driven in rotation about the longitudinal axis. The head includes at least one main protruding annular rib with an outer surface covered with abrasive grains of predetermined particle size and with a radial height corresponding to the depth of the groove to be cut, and at least one auxiliary protruding annular rib with an outer surface covered with abrasive grains of predetermined particle size and with a radial height less than the radial height of a main rib. The auxiliary rib includes two circular ridges separated by a ring band that is flat and that can be conical in shape.

Various tools are described which can be used for applying axial force to a die head such as during a thread forming operation performed on a pipe. The tools include provisions for selectively dispensing liquid agents such as oil or cutting agents to the die head or region of interest. The tools also include a member adapted for contacting an end face of a die head and transferring axial force thereto.

A coolant delivery head for whirling material stock. The coolant delivery head comprising a one-piece plate like structure sized to fit between the guide bushing and whirling unit of a CNC Swiss turning machine. The coolant delivery head comprises an intake port to receive high pressure coolant through a coolant supply line. Coolant channels internal to the delivery head body, channel the coolant to a first and second delivery port and a blow port. The delivery ports are angled to deliver coolant directly at cutter inserts in the whirling unit during operation. The blow port blows coolant towards the tailstock of the machine. The coolant delivery head comprises one or more fastener holes for receiving fasteners to secure the coolant delivery head to a whirling unit. Precise delivery of the coolant results in higher quality machined products and less tool wear.