Abstract: The invention relates to a sealing piston, which is designed for use in a hydraulic expansion chucking device. The sealing piston comprises a pin that extends in an axial direction (A), and a seal that adjoins the pin and likewise extends in said axial direction (A). The seal comprises a sealing shaft that adjoins the pin and has a shaft radius (Rs). The seal further comprises a sealing head that adjoins the sealing shaft, wherein the sealing head comprises a circumferential sealing lip, which has a sealing radius (Rd) that is greater than the shaft radius (Rs). The sealing lip forms a contact surface in radial direction (R) for abutment and sealing against an inner wall of a bore in the expansion chucking device, and, measured in axial direction (A), has a sealing length (Ld) that is greater than the difference between the sealing radius (Rd) and the shaft radius (Rs). The invention further relates to a corresponding expansion chucking device.

Abstract: A reducing sleeve for fastening a machining tool in a tool holder is described. Said reducing sleeve comprises a reducing sleeve body, which comprises a first tool-side end and a second tool holder-side end. In addition, at least one coolant supply channel is provided in the reducing sleeve body. Furthermore, a multifunctional interface is arranged at the second end and is designed for coupling to a sealing unit and a safety unit. Additionally presented is a modular system for providing a reducing sleeve assembly, which comprises such a reducing sleeve, a sealing unit, and a safety unit. In addition, a machining assembly with a tool holder, a reducing sleeve, and a machining tool is presented.

Abstract: A reducing sleeve for fastening a machining tool in a tool holder is described. The reducing sleeve includes a reducing sleeve body, which has a first tool-side end and a second tool holder-side end. In addition, at least one coolant supply channel is provided in the reducing sleeve body. In one embodiment, a safety unit with a pull-out safety geometry has a sealing element, such as an O-ring, to selectively direct coolant through coolant holes in the safety unit and the at least one coolant supply channel or alternatively through a central coolant channel. In this embodiment, a multifunctional interface, and additional O-ring and a sealing unit are not required. A modular reducing sleeve assembly includes a reducing sleeve and a safety unit as separate parts. In addition, a machining assembly including a tool holder, a reducing sleeve, and a machining tool is described.

Abstract: A reducing sleeve for fastening a machining tool in a tool holder is described. Said reducing sleeve comprises a reducing sleeve body, which comprises a first tool-side end and a second tool holder-side end. In addition, at least one coolant supply channel is provided in the reducing sleeve body. Furthermore, a multifunctional interface is arranged at the second end and is designed for coupling to a sealing unit and a safety unit. Additionally presented is a modular system for providing a reducing sleeve assembly, which comprises such a reducing sleeve, a sealing unit, and a safety unit. In addition, a machining assembly with a tool holder, a reducing sleeve, and a machining tool is presented.

Abstract: The invention relates to a sealing piston, which is designed for use in a hydraulic expansion chucking device. The sealing piston comprises a pin that extends in an axial direction (A), and a seal that adjoins the pin and likewise extends in said axial direction (A). The seal comprises a sealing shaft that adjoins the pin and has a shaft radius (Rs). The seal further comprises a sealing head that adjoins the sealing shaft, wherein the sealing head comprises a circumferential sealing lip, which has a sealing radius (Rd) that is greater than the shaft radius (Rs). The sealing lip forms a contact surface in radial direction (R) for abutment and sealing against an inner wall of a bore in the expansion chucking device, and, measured in axial direction (A), has a sealing length (Ld) that is greater than the difference between the sealing radius (Rd) and the shaft radius (Rs). The invention further relates to a corresponding expansion chucking device.

Abstract: Reducer sleeves are described herein. Reducer sleeves described herein comprise a reducer sleeve body having an axial forward end and an axial rearward end. The reducer sleeve body defines a longitudinal axis. Reducer sleeves further comprise a flange disposed at the axial forward end of the reducer sleeve body. The flange defines a first nozzle disposed at a first radial distance from the longitudinal axis and a second nozzle disposed at a second distance from the longitudinal axis. The reducer sleeve body defines a first trough extending from the axial rearward end to the axial forward end. The first trough is in communication with the first nozzle and the second nozzle, whereby coolant is able to enter the first trough and flow along the first trough and into the first nozzle and the second nozzle such that the coolant is ejected by the first nozzle and the second nozzle.

Abstract: Expansion chuck (1) with a base body (9) and an expansion sleeve (10) which is surrounded by a receptacle (6) for a tool, wherein the expansion sleeve (10) inside the base body (9) and at the front end (3) of the receptacle (6) is connected pressure-tight to the base body (9), thus forming a pressure chamber (11) between the base body (9) and the expansion sleeve (10), characterized in that the expansion sleeve (10) at the front end (3) of the base body (9) extends radially outward to an connecting section (34), where it is connected to the base body (9) in a pressure-tight manner.

Abstract: The invention relates to a tool for rotary-broaching workpieces, having a support (10) which can be directly or indirectly attached to a machine tool and having multiple segments (12) which are secured to the support (10), wherein multiple receiving areas for cutting inserts are provided on each of the segments (12), and wherein a hydraulic clamping unit (42) is provided on the support (10) for each segment (12), said segment (12) being clampable on the support (10) by means of the clamping unit (42).

Abstract: A hydraulic expansion chuck for receiving a tool includes a chuck body, an expansion bushing which is received in the chuck body and defines a chuck opening, a pressure chamber which is interposed between the expansion bushing and the chuck body, and a reduction sleeve. The reduction sleeve is received in the chuck opening of the expansion bushing and defines a tool holder receptacle for receiving the tool to be chucked. The reduction sleeve includes a connector element configured to releasably attach the reduction sleeve to the chuck body. The reduction sleeve also may include an adjustment element configured to adjust the axial position of the tool in the tool holder receptacle.

Abstract: Reducer sleeves are described herein. Reducer sleeves described herein comprise a reducer sleeve body having an axial forward end and an axial rearward end. The reducer sleeve body defines a longitudinal axis. Reducer sleeves further comprise a flange disposed at the axial forward end of the reducer sleeve body. The flange defines a first nozzle disposed at a first radial distance from the longitudinal axis and a second nozzle disposed at a second distance from the longitudinal axis. The reducer sleeve body defines a first trough extending from the axial rearward end to the axial forward end. The first trough is in communication with the first nozzle and the second nozzle, whereby coolant is able to enter the first trough and flow along the first trough and into the first nozzle and the second nozzle such that the coolant is ejected by the first nozzle and the second nozzle.

Abstract: A rotary cutting tool, in particular a drill or milling cutter for heavy-duty cutting applications, is provided, said rotary cutting tool having at least one cutting edge and a shank having a free end. The shank has in its circumferential surface a groove for receiving a pull-out prevention element, wherein the groove extends axially and at the same time at least partially along the circumference of the shank and, starting at a distance from the free end of the shank, in the direction of the opposite free end. Also provided is a tool unit for a rotary cutting tool.

Abstract: The invention relates to a hydraulic expansion chuck with a basic body, with an expansion bush which is received in the basic body and defines a reception space for a tool to be chucked, and with a pressure chamber which is delimited between the expansion bush and the basic body, at least one solder region being provided, in which the expansion bush is soldered to the basic body, wherein, between the pressure chamber and the solder region, a seal is provided which is formed by an at least essentially fluid-tight bearing contact of the expansion bush against the basic body.

Abstract: Expansion chuck (1) with a base body (9) and an expansion sleeve (10) which is surrounded by a receptacle (6) for a tool, wherein the expansion sleeve (10) inside the base body (9) and at the front end (3) of the receptacle (6) is connected pressure-tight to the base body (9), thus forming a pressure chamber (11) between the base body (9) and the expansion sleeve (10), characterized in that the expansion sleeve (10) at the front end (3) of the base body (9) extends radially outward to an connecting section (34), where it is connected to the base body (9) in a pressure-tight manner.

Abstract: A tool holder has a body with a spindle side for fastening the tool holder to a spindle of a machine tool and a tool side for accommodating a tool and has a lubricating media passage from the spindle side to the tool side that contains a lubricating media bush adjustable in the axial direction in the body. The lubricating media bush opens out on the tool side of the body, wherein a guide for the lubricating media hush is provided in the body. The guide contains a fitting section in which the lubricating media bush is adjustably guided, wherein a seal is provided which seals the lubricating media bush relative to the body.

Abstract: A hydraulic expansion chuck for receiving a tool includes a chuck body, an expansion bushing which is received in the chuck body and defines a chuck opening, a pressure chamber which is interposed between the expansion bushing and the chuck body, and a reduction sleeve. The reduction sleeve is received in the chuck opening of the expansion bushing and defines a tool holder receptacle for receiving the tool to be chucked. The reduction sleeve includes a connector element configured to releasably attach the reduction sleeve to the chuck body. The reduction sleeve also may include an adjustment element configured to adjust the axial position of the tool in the tool holder receptacle.

Abstract: A rotary cutting tool, in particular a drill or milling cutter for heavy-duty cutting applications, is provided, said rotary cutting tool having at least one cutting edge and a shank having a free end. The shank has in its circumferential surface a groove for receiving a pull-out prevention element, wherein the groove extends axially and at the same time at least partially along the circumference of the shank and, starting at a distance from the free end of the shank, in the direction of the opposite free end. Also provided is a tool unit for a rotary cutting tool.

Abstract: The invention relates to a hydraulic expansion chuck with a basic body, with an expansion bush which is received in the basic body and defines a reception space for a tool to be chucked, and with a pressure chamber which is delimited between the expansion bush and the basic body, at least one solder region being provided, in which the expansion bush is soldered to the basic body, wherein, between the pressure chamber and the solder region, a seal is provided which is formed by an at least essentially fluid-tight bearing contact of the expansion bush against the basic body.

Abstract: A tool holder comprising a body which has a spindle side for fastening the tool holder to a spindle of a machine tool and a tool side for accommodating a tool and comprising a lubricating media passage from the spindle side to the tool side contains a lubricating media bush adjustable in the axial direction in the body, said lubricating media bush opening out on the tool side of the body, wherein a guide for the lubricating media bush is provided in the body, said guide containing a fitting section in which the lubricating media bush is adjustably guided, wherein a seal is provided which seals the lubricating media bush relative to the body.

Abstract: A hydraulic expansion chuck for chucking a tool such as a boring tool, a milling cutter, or other cutting tool. The hydraulic expansion chuck has an expansion bushing which can be deformed radially under the action of a pressure fluid contained in a pressure chamber to chuck a tool. Pressure is transmitted to the pressure chamber from a pressure generating unit via an annular gap positioned about the chuck axis.