A numerical controller controls a machine tool that performs a turning on a workpiece on the basis of a cycle instruction indicated by an NC program. The machine tool includes first and second cutter holders that are mutually coupled by a coupling member, and first and second tools are mounted on the cutter holders in mutually opposing fashion. The machine tool performs a turning according to a complex fixed cycle, in a reciprocal fashion rather than unidirectionally, using the first and second tools, and when the turning by the first tool has been completed and the first tool that has performed a turning is withdrawn, it is possible to perform a turning in the opposite direction by the second tool on the opposite side.

A numerical controller controls a machine tool that performs a turning on a workpiece on the basis of a cycle instruction indicated by an NC program. The machine tool includes first and second cutter holders that are mutually coupled by a coupling member, and first and second tools are mounted on the cutter holders in mutually opposing fashion. The machine tool performs a turning according to a complex fixed cycle, in a reciprocal fashion rather than unidirectionally, using the first and second tools, and when the turning by the first tool has been completed and the first tool that has performed a turning is withdrawn, it is possible to perform a turning in the opposite direction by the second tool on the opposite side.

A cutting tool includes a tool body having a peripherally disposed outer insert receiving pocket and an interiorly disposed inner insert receiving pocket with a cutting insert resiliently clamped therein. The tool body includes a through recess at least partially circumferentially bounded by a recess circumferential surface. A resilient clamping member extends into the through recess. The inner insert receiving pocket is formed by the resilient clamping member and a recess pocket portion of the recess circumferential surface. A chamfering cutting insert may be retained by the resilient clamping member, without the use of an additional, separate clamping device.

An apparatus for cutting a pipe has a base comprising a pipe support having at least one set of lower rollers and an upper frame supporting a cutting apparatus and at least one upper roller. The upper frame is moveable relative to the base between an open position in which the pipe may be inserted between the at least one set of lower rollers and the at least one upper roller, and a clamping position in which the pipe is in contact with the at least one set of lower rollers and the at least one upper roller. The cutting apparatus comprises a grooving member configured to provide an annular groove on an outer surface of the pipe, a cutting member configured to cut the pipe, and a chamfering member configured to provide a chamfer on the outer surface of the pipe between a location of the annular groove and a location of the cut in the pipe.

An apparatus for cutting a pipe has a base comprising a pipe support having at least one set of lower rollers and an upper frame supporting a cutting apparatus and at least one upper roller. The upper frame is moveable relative to the base between an open position in which the pipe may be inserted between the at least one set of lower rollers and the at least one upper roller, and a clamping position in which the pipe is in contact with the at least one set of lower rollers and the at least one upper roller. The cutting apparatus comprises a grooving member configured to provide an annular groove on an outer surface of the pipe, a cutting member configured to cut the pipe, and a chamfering member configured to provide a chamfer on the outer surface of the pipe between a location of the annular groove and a location of the cut in the pipe.

A clamping device of a tool holding plate is provided for an automatic lathe, by means of which a tool holder can be detachably fastened in a receiving slot in the tool holding plate so as to be secured in place and rotationally fixed, wherein the clamping device can be detachably fastened to the tool holding plate by fastening means. Cooling of tools during operation is provided by a coolant jet introduced into the direct vicinity of the tool by means of a coolant channel arranged in or on the clamping device, running at least partially across the clamping device from an inlet, via an intermediate channel to an outlet.

A clamping device of a tool holding plate is provided for an automatic lathe, by means of which a tool holder can be detachably fastened in a receiving slot in the tool holding plate so as to be secured in place and rotationally fixed, wherein the clamping device can be detachably fastened to the tool holding plate by fastening means. Cooling of tools during operation is provided by a coolant jet introduced into the direct vicinity of the tool by means of a coolant channel arranged in or on the clamping device, running at least partially across the clamping device from an inlet, via an intermediate channel to an outlet.

A pipe cutting tool having: a plurality of rollers; a clamping member moveable between an open position in which a pipe is insertable between the plurality of rollers and a clamping position in which the pipe is secured between the rollers; a cutting apparatus having first, second, and third cutting members configured to optionally sequentially engage the pipe when positioned between the plurality of rollers; a drive motor drivingly connected to at least one of the rollers; and an actuator operatively connected to the drive motor.

A pipe cutting tool having: a plurality of rollers; a clamping member moveable between an open position in which a pipe is insertable between the plurality of rollers and a clamping position in which the pipe is secured between the rollers; a cutting apparatus having first, second, and third cutting members configured to optionally sequentially engage the pipe when positioned between the plurality of rollers; a drive motor drivingly connected to at least one of the rollers; and an actuator operatively connected to the drive motor.

A pipe cutting tool having: a plurality of rollers; a clamping member moveable between an open position in which a pipe is insertable between the plurality of rollers and a clamping position in which the pipe is secured between the rollers; a cutting apparatus having first, second, and third cutting members configured to optionally sequentially engage the pipe when positioned between the plurality of rollers; a drive motor drivingly connected to at least one of the rollers; and an actuator operatively connected to the drive motor.