# US 12,766,610 B2 · Toolholder and cutting apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,766,610 B2 - Document ID: US12766610B2 - Status: Granted - Kind: B2 - Application number: 18/204,590 - Filed: 2023-06-01 - Published: 2023-12-07 - Granted: 2026-10-20 - Earliest claimed: 2022-06-02 - Assignees: Kennametal Inc. - Applicants: Kennametal Inc. - Inventors: Josef Herud; Santhosha Boregowda - Web page: https://patentgrep.com/patent/US12766610B2 ## CPC - B23B 31/305: {the gripping means is a deformable sleeve} - B23Q 11/1023: {Tool holders, or tools in general specially adapted for receiving the cutting liquid from the spindle} - B23B 2231/24: Cooling or lubrication means - B23B 2250/12: Cooling and lubrication - B23C 2250/12: Cooling and lubrication - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT - B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q) ## Abstract A toolholder (14) for fastening a chipping tool is specified, having a holding body (22) extending along a holding center axis (20), having a first tool-side end (24) and a second toolholder-side end (26) opposite the first end (24), wherein the holding body (22) comprises at least one coolant supply channel (28) spaced apart from the holding central axis (20), wherein a discharge element (34) is arranged at the second end (26), in which at least one channel-like discharge nozzle (36) is formed, which is fluidly connected to the coolant supply channel (28) and through which coolant can be ejected onto a tool held in the toolholder (14), and wherein a nozzle longitudinal axis (40) extending centrally in the discharge nozzle (36) is inclined to the holding center axis (20) in the radial direction and in the circumferential direction. Furthermore, a cutting apparatus (10) having a toolholder (14) is specified. ## Claims ### Claim 1 A toolholder, comprising: a holding body extending along a holding center axis, the holding body has a first end and a second end opposite the first end, and a plurality of coolant supply channels each spaced apart from the holding center axis; and a discharge element arranged at the second end and having a plurality of discharge units formed therein, each discharge unit includes a plurality of discharge nozzles, the plurality of discharge nozzles of one discharge unit are fluidly connected to one coolant supply channel, such that a coolant is ejected through each discharge nozzle onto a tool held in the toolholder, at least one coolant supply channel is configured at least in one section as a slot, the slot extends through the holding body and is defined by a pair of walls of the holding body opposite each other, each discharge nozzle has a nozzle longitudinal axis extending centrally through the discharge nozzle, the nozzle longitudinal axis being angularly offset from the holding center axis about two non-parallel axes, the angular offset comprising a first angular component in a radial plane of the discharge element and a second angular component in a circumferential plane of the discharge element. ### Claim 2 (depends on 1) The toolholder according to claim 1, wherein offsetting of the nozzle longitudinal axis in the radial plane and/or circumferential plane is between 6° and 15°. ### Claim 3 (depends on 1) The toolholder of claim 1, wherein the nozzle longitudinal axis is offset into the circumferential plane more than into the radial plane. ### Claim 4 (depends on 1) The toolholder according to claim 1, wherein offsetting of the nozzle longitudinal axis in the radial plane and/or in the circumferential plane is between 3° and 30°. ### Claim 5 (depends on 1) The toolholder of claim 1, wherein the discharge nozzles are offset differently in the radial plane and/or in the circumferential plane. ### Claim 6 (depends on 1) The toolholder according to claim 1, wherein at least one discharge nozzle tapers towards an outlet. ### Claim 7 (depends on 1) The toolholder according to claim 1, wherein at least one coolant supply channel extends at least in sections inside the holding body. ### Claim 8 (depends on 1) The toolholder according to claim 1, wherein the at least one coolant supply channel is also configured in at least one other section as a groove that extends on an outer circumference of the holding body, the groove extends partially into the holding body. ### Claim 9 (depends on 1) The toolholder according to claim 1, wherein each coolant supply channel comprises a cooling manifold section, via which the coolant is distributed to the plurality of discharge nozzles of one discharge unit. ### Claim 10 (depends on 9) The toolholder according to claim 9, wherein each cooling manifold section extends only over a partial region of a circumference of the holding body. ### Claim 11 (depends on 1) A cutting apparatus having a toolholder according to claim 1, wherein the cutting apparatus comprises an expansion chuck having a holding section into which the toolholder is inserted. ### Claim 12 (depends on 1) The toolholder according to claim 1, wherein the toolholder fastens a chipping tool. ### Claim 13 (depends on 9) The toolholder according to claim 9, wherein at least one cooling manifold section extends only over a partial region of a circumference of the holding body. ### Claim 14 (depends on 1) The toolholder according to claim 1, wherein each discharge unit is distributed circumferentially around the holding center axis. ### Claim 15 A toolholder, comprising: a holding body extending along a holding center axis, the holding body has a first end and a second end opposite the first end, and a plurality of coolant supply channels each spaced apart from the holding center axis; and a discharge element arranged at the second end and having a plurality of discharge units formed therein, each discharge unit includes a plurality of discharge nozzles, the plurality of discharge nozzles of one discharge unit are fluidly connected to one coolant supply channel, such that a coolant is ejected through each discharge nozzle onto a tool held in the toolholder, at least one coolant supply channel is configured at least in one section as a groove that extends on an outer circumference of the holding body and in at least one other section as a slot, the groove extends partially into the holding body, the slot extends through the holding body and is defined by a pair of walls of the holding body opposite each other. ### Claim 16 (depends on 15) The toolholder according to claim 15, wherein the at least one coolant supply channel is configured at least in two sections as grooves that each extend on an outer circumference of the holding body, the two grooves each extend into the slot of the at least one other section. ### Claim 17 A toolholder, comprising: a holding body extending along a holding center axis, the holding body has a first end and a second end opposite the first end, and a plurality of coolant supply channels each spaced apart from the holding center axis; and a discharge element arranged at the second end and having a plurality of discharge units formed therein, each discharge unit includes a plurality of discharge nozzles, the plurality of discharge nozzles of one discharge unit are fluidly connected to one coolant supply channel, such that a coolant is ejected through each discharge nozzle onto a tool held in the toolholder, at least one coolant supply channel is configured at least in sections as a slot, the slot extends through the holding body and is defined by a pair of walls of the holding body opposite each other. ### Claim 18 (depends on 6) The toolholder of claim 6, wherein the taper results in the outlet having a smaller cross-sectional area than an inlet. ### Claim 19 (depends on 1) The toolholder according to claim 1, wherein the first angular component is a rotation of the nozzle longitudinal axis about a first axis lying in the radial plane of the discharge element, and the second angular component is a rotation of the nozzle longitudinal axis about a second axis lying in the circumferential plane of the discharge element, the first and second axes being orthogonal to one another.