A tool holder (100) holds a tool (170) in a non-rotatable manner. When an attaching surface (112a) of a body part (110, 120, 150) of the tool holder is attached to a tool holder attachment surface of a machine tool, cooling medium supplied from the machine tool flows through a first body part passage (114, 124). Then, a rotary member (130) is rotationally driven by a drive mechanism provided in the machine tool. When a rotary part of a pump (200) rotates with the rotary member, the pressure of the cooling medium suctioned into the pump is proportionally increased in accordance with the rotational speed of the rotary part, and pressurized cooling medium is discharged from an outlet part (202) of the pump. The pressurized cooling medium then flows through a second body part passage (115, 125) and is thereafter sprayed from a spray hole (161) of a nozzle (160).

Method of producing a body (1) for bar feeders, wherein it comprises a first molding step (A) carried out with the aid of a first molding material (M1) in a mold (20) jointly with an overmolding step (B) of a countermold (50), the shape of the mold (20) and/or the shape impressions of the countermold being conceived to achieve in an integral way at least one structural and/or functional element of the said bar feeder.

A tool rest includes a plurality of attachment portions to which a plurality of tool holders are detachably attached respectively. Each of the tool holders includes a clamp mechanism for clamping a tool. The attachment portion includes a seat surface on which the tool holder is seated. The tool rest further includes: a first air channel to which air is supplied; a plurality of second air channels branched off from the first air channel and respectively extending toward the plurality of attachment portions, each of the plurality of second air channels being open to the seat surface of a corresponding one of the plurality of attachment portions; and a detector that is provided on a path of the first air channel and detects a state of an airflow.

A tool rest includes a plurality of attachment portions to which a plurality of tool holders are detachably attached respectively. Each of the tool holders includes a clamp mechanism for clamping a tool. The attachment portion includes a seat surface on which the tool holder is seated. The tool rest further includes: a first air channel to which air is supplied; a plurality of second air channels branched off from the first air channel and respectively extending toward the plurality of attachment portions, each of the plurality of second air channels being open to the seat surface of a corresponding one of the plurality of attachment portions; and a detector that is provided on a path of the first air channel and detects a state of an airflow.

A machine tool comprising: a first spindle; a second spindle provided on a rear headstock to face the first spindle; a barstock supply unit for supplying an elongate rod to the first spindle; and a processing means including a tool for processing the barstock, characterized in that the machine tool further comprises: a workpiece clamp device provided on the rear headstock and adapted to grip a second material comprised of the barstock that has been removed from the first spindle as an old material; and a joining means for joining opposite end portions of the second material gripped by the workpiece clamp device and of a first material gripped by the first gripping means and comprised of a barstock newly supplied by the barstock supply unit, thereby to integrate the second material and the first material into a single barstock.

Centring device for centring bars, tubes or similar to supply to a spindle of a machine tool, includes: a support base body, along which a through opening is obtained for the passage of the bar, oblong centring elements, connected rotatably to the support base body and arranged circumferentially with respect thereto to maintain the bar axially aligned on the spindle of the machine tool, an elastic element arranged for urging elastically the oblong centring elements to a radial collecting and contraction position in which they are in mutual proximity.

Centring device for centring bars, tubes or similar to supply to a spindle of a machine tool, includes: a support base body, along which a through opening is obtained for the passage of the bar, oblong centring elements, connected rotatably to the support base body and arranged circumferentially with respect thereto to maintain the bar axially aligned on the spindle of the machine tool, an elastic element arranged for urging elastically the oblong centring elements to a radial collecting and contraction position in which they are in mutual proximity.

A tool holding device for positioning a cutting tool on a centerline of a lathe is disclosed, including a cutting tool releasably attached to a cutting tool clamp. A main body is connected to the cutting tool clamp, wherein the main body being connectable to a lathe spindle. The cutting tool clamp is machined at an eccentric centerline of the main body to enable a centerline of the cutting tool to be positioned in-line with a centerline of the lathe spindle.

A tool holding device for positioning a cutting tool on a centerline of a lathe is disclosed, including a cutting tool releasably attached to a cutting tool clamp. A main body is connected to the cutting tool clamp, wherein the main body being connectable to a lathe spindle. The cutting tool clamp is machined at an eccentric centerline of the main body to enable a centerline of the cutting tool to be positioned in-line with a centerline of the lathe spindle.

The present invention relates to a socket alignment device for a bar loading magazine for guiding a bar of material to an automatic lathe, wherein a z-axis (z) is defined by the longitudinal axis of a bar of material (2) guided in the bar loading magazine, and wherein a first socket (1), into which the bar of material (2) is to be introduced for processing thereof in the automatic lathe along the z-axis, is arranged in the bar loading magazine, wherein the first socket (1) is mounted so as to be rotatable either coaxially about the z-axis (z) or about a rotational axis () parallel to the z-axis (z) and wherein at least one drive means (6) is included, which can be coupled at least to the first socket (1), specifically to the rotary drive of the first socket (1) about the z-axis (z) in such a manner that the first socket (1) and the cross-sectional profile of the bar of material (2) can be aligned flush with one another for introduction of the bar of material (2).