# US 2019/0168315 A1 · Rotary tool having exchangeable cutting inserts and tool main-body set for a rotary tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168315 A1 - Document ID: US20190168315A1 - Status: Published application - Kind: A1 - Application number: 16/204,202 - Filed: 2018-11-29 - Published: 2019-06-06 - Earliest claimed: 2016-06-02 - Assignees: Guehring KG - Applicants: Guehring KG - Inventors: Felix REBHOLZ; lngo Von Puttkamer - Web page: https://patentgrep.com/patent/US20190168315A1 ## CPC - B23B 51/08: Drills combined with tool parts or tools for performing additional working {(B23G5/20 takes precedence)} - B23B 51/0004: {with cutting heads or inserts attached by screw means} - B23B 2251/02: Connections between shanks and removable cutting heads - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) ## Abstract A rotary tool, comprising: a tool main body comprising a clamping section and a tool head; an exchangeable first cutting insert having at least one first cutting region having a first cutting edge, wherein the first cutting insert can be inserted into an insert groove of the tool main body from the front side of the tool head and can be fastened therein in a rotationally fixed manner; and an exchangeable second cutting insert fastened to the tool head and offset toward the clamping section in the axial direction of the rotary tool relative to the first cutting insert and which has an insert main body and at least one second cutting region having at least one second cutting edge. A fastening means for the second cutting insert is arranged in the insert groove of the first cutting insert. Also, a cutting insert set and a tool main-body set. ## Claims ### Claim 1 A rotary tool for a machining of workpieces comprising a tool main body comprising: a clamping section; a tool head; an exchangeable first cutting insert having at least one first cutting region having a first cutting edge, wherein the first cutting insert can be inserted from a front side of the tool head into an insert groove of the tool main body and can be fastened therein in a rotationally fixed manner; and an exchangeable second cutting insert as reaming blade insert which is fastened on the tool head in an offset position with respect to the first cutting insert in an axial direction of the rotary tool in a direction of the clamping, the second cutting insert comprising an insert main body and at least one second cutting region having a second cutting edge, the second cutting insert can be fixed via a central position with respect to a tool head cross-section from the front side of the tool head, a fastening means for the second cutting insert is arranged in the insert groove and is accessible from the front side and that the fastening means is configured to be longer than a diameter of the insert main body, wherein the fastening means has a thread for screwing to the tool main body in at least one region outside the insert main body in the installed state in the insert main body. ### Claim 2 (depends on 1) The rotary tool according to claim 1, wherein the insert main body is inserted exchangeably into a radial through hole of the tool head. ### Claim 3 (depends on 1) The rotary tool according to claim 1, wherein a length of the insert main body is less than or equal to a diameter of the tool head and the second cutting region projects beyond a radius of the first cutting region by a radial distance. ### Claim 4 (depends on 1) The rotary tool according to claim 1, wherein the insert main body is configured to be cylindrical and has a circular, partially circular, rectangular or elliptical cross-section. ### Claim 5 (depends on 1) The rotary tool according to claim 1, wherein the second cutting insert is configured to be point-symmetrical in relation to a point on a cross-sectional surface at half the length of the second cutting insert. ### Claim 6 (depends on 1) The rotary tool according to claim 1, wherein the insert main body and the second cutting region are formed from separate components, wherein the second cutting region with the second cutting edge is soldered, welded or screwed onto the insert main body. ### Claim 7 (depends on 1) The rotary tool according to claim 1, wherein the insert main body has a radial through-hole transverse to a direction of insertion and a conical recess in which a head of the fastening means can be recessed at least partially, with the result that the second cutting insert is fastened in a centered manner on an axis of rotation in the tool head. ### Claim 8 (depends on 1) The rotary tool according to claim 1, wherein the insert groove has a blind hole in the direction of the clamping section which has at least two sections with different diameters, wherein at least one section in a direction of the section arranged in a tool shaft has a thread. ### Claim 9 (depends on 1) A cutting insert set for a rotary tool according to claim 1, comprising at least one first cutting insert and/or a second cutting insert for replacement exchange in a tool main body of the rotary tool. ### Claim 10 (depends on 9) The cutting insert set according to claim 9, wherein the cutting insert set further comprises a fastening means for fastening the second cutting insert. ### Claim 11 (depends on 1) A tool main body set for a rotary tool according to claim 1, comprising at least one clamping section and a tool head with an insert groove on the front side of the tool head. ### Claim 12 (depends on 11) The tool main body set according to claim 11, wherein the tool head has a radial through hole arranged in an offset position with respect to the insert groove in the axial direction of the rotary tool in the direction of the clamping section. ### Claim 13 (depends on 12) The tool main body set according to claim 12, wherein in the insert groove a blind hole is arranged on an axis of rotation, which has at least two different diameters and intersects the through-hole.