Rotary cutting tool with energy harvesting arrangement

Abstract

A rotary cutting tool has a tool holder (22) and a cutting portion releasably attached to the tool holder. The tool holder includes a mounting portion (34) designed to be attached to a spindle. The rotary cutting tool also has a fluid passage (46) and an energy harvesting arrangement (58) including a turbine (60) located in the fluid passage. The fluid passage is open for a supply of fluid about a passage inlet opening (48) located at the mounting portion, and a passage outlet opening (50) is in fluid communication with the passage inlet opening.

Description

Technical Field

[0001] The subject matter of this application relates to rotary cutting tools, and in particular, to such rotary cutting tools having an energy harvesting arrangement, and even more particularly, to such energy harvesting arrangements having a fluid-driven turbine. Background Technology

[0002] The cutting tool assembly may include an energy harvesting arrangement with a fluid-driven turbine.

[0003] EP2095897 discloses a tool retainer assembly. A secondary pipe originates from a main pipe, which supplies a normally pressurized lubricant-coolant flow in the machining zone. A generator is located at the secondary pipe. In this manner, a portion of the flow provided for lubrication / cooling in the machining zone is used to actuate a turbine that rotates the generator. Fluid output from the generator is conveyed through the secondary pipe to a discharge outlet.

[0004] US2015 / 125230 discloses an apparatus including a spindle and a tool, the tool including a tool holder fixed in a mating relationship to an end of the spindle. The tool has a workpiece end that is entirely powered by an energy harvesting device. In a first embodiment ( Figure 2 In the second embodiment (Figure 6), a second fluid flow path extends through the tool holder to deliver fluid to an energy harvesting device. The energy harvesting device powers a sensor that can be used to inspect the workpiece as part of the machining process. In the second embodiment (Figure 6), the workpiece end includes means for inserting a threaded cutting tool into the workpiece. The energy harvesting device harvests energy from the rotational motion of the spindle transmitted to the tool and tool holder shaft.

[0005] US4,716,657 discloses a machine having a movable part capable of releasably supporting a tool for operating on a workpiece, and a pressurized fluid supply source. The tool includes circuitry supplied with power from an electric generator, which is driveably connected to a turbine driven by the machine's pressurized fluid supply source. In a first embodiment ( Figure 1 In the second embodiment, the machine includes a measuring probe. Figure 2 In this machine, the machine includes a boring bar with a cutter. A turbine, in the form of a waterwheel, is arranged around the outer periphery of the collar.

[0006] US6,840,723 discloses a work unit intended for mounting on a movable machine operating tool support. The work unit includes a housing attached to the tool support and supporting a pneumatic turbine motor having a rotor, a shank end mill-type machining tool having a cutter portion extending from the housing and a shank portion rotatably journaled within the housing. The machining tool shank portion is rigidly integrated with a turbine wheel to form a turbine rotor. A flow control valve is arranged to deliver pressurized air to the turbine motor. Summary of the Invention

[0007] According to a first aspect of the subject matter of this application, a rotary cutting tool is provided, having a tool central axis defining opposite forward and backward directions, and the rotary cutting tool is rotatable about the tool central axis. The rotary cutting tool includes:

[0008] A tool holder, comprising a mounting portion and a cutting portion receiving portion located at opposite rear and front ends of the tool holder, respectively;

[0009] A cutting portion, which is releasably attached to a cutting portion receiving portion, the cutting portion including a cutting edge;

[0010] Fluid channels, including:

[0011] a) A channel inlet opening located at the mounting section and configured to receive fluid supply;

[0012] b) A channel outlet opening that is in fluid communication with a channel inlet opening and is configured to discharge fluid entering at the channel inlet opening; and

[0013] c) The passage turbine chamber located between the passage inlet opening and the passage outlet opening; and

[0014] Energy harvesting setup, which includes:

[0015] The turbine is located in the channel turbine chamber and is configured to rotate by fluid flowing from the channel inlet opening in the forward flow direction to the channel outlet opening.

[0016] It is understood that the above is an overview, and the features described below may be applied to the subject matter of this application in any combination; for example, any of the following features may be applied to rotary cutting tools:

[0017] Rotary cutting tools may include a single fluid channel.

[0018] Rotary cutting tools may have only a single channel inlet opening and a single channel outlet opening, and the fluid channel may not branch between the channel inlet opening and the channel outlet opening.

[0019] The channel outlet opening can be located at the cutting section or at the front end of the tool holder.

[0020] The channel outlet opening can be located at the cutting section.

[0021] The outlet opening of the channel can be oriented to discharge fluid near the cutting edge.

[0022] Fluid channels can be through channels formed within rotary cutting tools.

[0023] The cutting parts can be integrated to form a single, integral structure.

[0024] Tool holders can be integrated to have a monolithic, one-piece construction.

[0025] The tool retainer may include a rear retainer surface and a front retainer surface, as well as a peripheral retainer surface extending between the rear and front retainer surfaces about the tool's central axis. The rear retainer surface may be located at the rear end of the rotary cutting tool. The channel inlet opening may be located at the rear retainer surface.

[0026] The fluid channel can pass through the front surface of the retainer.

[0027] The rotary cutting tool may further include a fastening arrangement comprising a locking nut and a collet. The cutting portion can be releasably attached to the tool holder via the locking nut and collet.

[0028] The fluid passage may include a channel turbine front chamber adjacent to and located behind the channel turbine chamber relative to the forward flow direction. In a radial section taken in a plane perpendicular to the tool's central axis passing through the fluid passage, the cross-sectional area of ​​the fluid passage at the channel turbine chamber may be larger than the cross-sectional area at the channel turbine front chamber.

[0029] The fluid passage may include a channel turbine rear chamber adjacent to the channel turbine chamber and located in front of it relative to the forward flow direction. A cutting portion may extend into the channel turbine rear chamber and be spaced apart from the turbine.

[0030] The passage turbine chamber can be aligned with the tool's central axis.

[0031] A turbine may include multiple radially extending turbine blades. These radially extending turbine blades may be made of aluminum.

[0032] The energy harvesting arrangement may further include an electric generator located in the channel turbine chamber and driveably connected to the turbine.

[0033] The energy harvesting arrangement may further include two cables that extend from the electric generator and terminate at two electrical connectors mounted on the tool holder.

[0034] A portion of each of the two cables may be located in the fluid channel.

[0035] The tool retainer may include a rear retainer surface and a front retainer surface, and a peripheral retainer surface extending between the rear and front retainer surfaces about a central axis of the tool, the rear retainer surface being located at the rear end of the rotary cutting tool. The peripheral retainer surface may include a lateral retainer recess therein. The rotary cutting tool may include an electrical arrangement with two electrical connectors located thereon. The electrical arrangement may be located within the lateral retainer recess.

[0036] Electrical arrangements may include sensors configured to monitor cutting tools and / or cutting operations.

[0037] The electrical arrangement may further include a rechargeable battery configured to power the sensor, the rechargeable battery receiving power from an electric generator.

[0038] The fluid channel may include a tool center axis that runs through the entire length of the fluid channel of the tool holder.

[0039] The fluid channel may include a tool centerline that runs the entire length of the fluid channel, passing through both the tool holder and the cutting portion.

[0040] The rotary cutting tool may further include a turbine socket portion that is separable from and located within the tool holder. A channel turbine chamber may be formed within the turbine socket portion. Attached Figure Description

[0041] To better understand this application and to show how it can be implemented in practice, reference will now be made to the accompanying drawings, in which:

[0042] Figure 1 This is a perspective view of a partially sectioned rotary cutting tool according to this application;

[0043] Figure 2 yes Figure 1 An exploded perspective view of a rotary cutting tool shown in the image;

[0044] Figure 3 yes Figure 1 An axial cross-sectional view of a rotary cutting tool is shown in the figure; and

[0045] Figure 4 yes Figure 3 Details.

[0046] It will be appreciated that, for the sake of simplicity and clarity, the elements shown in the figures are not necessarily drawn to scale. For example, for clarity, the dimensions of some elements may be enlarged relative to other elements, or several physical components may be included in a single functional block or element. Furthermore, where deemed appropriate, reference numerals may be repeated between figures to indicate corresponding or similar elements. Detailed Implementation

[0047] In the following description, various aspects of the subject matter of this application will be described. Specific constructions and details are elaborated sufficiently for illustrative purposes to provide a thorough understanding of the subject matter of this application. However, it will also be apparent to those skilled in the art that the subject matter of this application can be practiced without the specific constructions and details set forth herein.

[0048] First, focus on the rotary cutting tool 20 shown. Figure 1 and Figure 2 The accompanying drawings depict aspects of this application. In this non-limiting example, the rotary cutting tool 20 can be configured as a drilling tool suitable for drilling operations. The rotary cutting tool 20 has a tool central axis A. The tool central axis A defines opposite forward directions D. F and backward direction D R The tool's central axis A forms a rotation axis, and the rotary cutting tool 20 can rotate around this rotation axis in the rotation direction R.

[0049] It should be recognized that in the following discussion of the rotary cutting tool 20, the terms "forward" and "backward" are used throughout the specification and claims, respectively referring to... Figure 3 and Figure 4 The relative positions of the tool along its central axis A to the right and left. Furthermore, unless otherwise stated, the terms "axial" and "radial" refer to the tool's central axis A.

[0050] Special reference Figure 2 and Figure 3 The rotary cutting tool 20 has a tool holder 22. The tool holder 22 includes a rear end portion 24 and a front end portion 26 positioned opposite the rear end portion 24. According to some embodiments of the subject matter of this application, the tool holder 22 may be made of steel. The tool holder 22 may be integrally formed to have a single, one-piece construction. The tool holder 22 may include a rear surface 28 and a front surface 30, and a peripheral surface 32 extending between the rear surface 28 and the front surface 30. The peripheral surface 32 may extend about a central axis A of the tool. The rear surface 28 may be located at the rear end portion 24 of the rotary cutting tool 20.

[0051] The tool holder 22 includes a mounting portion 34 located at the rear end 24 of the tool holder 22. The mounting portion 34 is designed to attach to a spindle (not shown) and provides a drive mechanism to rotate the cutting tool 20.

[0052] like Figure 2As best viewed, the tool holder 22 includes a cutting portion receiving portion 35 located at the front end 24 of the tool holder 22. The cutting portion receiving portion 35 is designed to receive a cutting portion. The cutting portion receiving portion 35 is positioned axially opposite to the mounting portion 34.

[0053] A rotary cutting tool 20 has a cutting portion 36. The cutting portion 36 is releasably attached to a tool holder 22. Specifically, the cutting portion 36 is attached to the tool holder 22 at a cutting portion receiving portion 35 of the tool holder. The cutting portion 36 includes a cutting edge 38 for cutting a workpiece. According to some embodiments of the subject matter of this application, the cutting portion 36 may be integrally formed to have an integral, one-piece construction. In such a construction, the cutting portion 36 may be made of cemented carbide. Alternatively, the cutting portion 36 may include a shank portion having at least one cutting insert releasably attached thereto at a forward end of the shank portion. In such a construction, the cutting insert may be made of cemented carbide, and the shank portion may be made of steel.

[0054] According to some embodiments of the subject matter of this application, the rotary cutting tool 20 may include a fastening arrangement. In this non-limiting example shown in the drawings, the fastening arrangement 40 may include a locking nut 42 and a collet 44. The cutting portion 36 may be releasably attached to the tool holder 22 via the locking nut 42 and the collet 44. The cutting portion receiving portion 35 may include a tapered recess 45 for receiving the collet 44. Specifically, the tapered recess 45 may be formed in the front surface 30 of the holder.

[0055] The rotary cutting tool 20 includes a fluid passage 46. As described later in this specification, the fluid passage 46 is used to deliver fluid for actuating a turbine. According to some embodiments of the subject matter of this application, the fluid may be, for example, oil, water, or an emulsion. The fluid passage 46 may be a through channel formed within the rotary cutting tool 20.

[0056] The fluid channel 46 may include a tool center axis A that extends through the tool holder 22 along the entire length of the fluid channel. Alternatively, the fluid channel 46 may include a tool center axis A that extends through a portion of the length of the fluid channel through the tool holder 22.

[0057] The fluid passage 46 includes a passage inlet opening 48 located at the mounting portion 34. The passage inlet opening 48 is configured to receive a fluid supply. According to some embodiments of the subject matter of this application, the passage inlet opening 48 may be located at the rear end 24 of the tool holder 22. Specifically, the passage inlet opening 48 may be located at the rear surface 28 of the holder. That is, the fluid passage 46 may be open at the passage inlet opening 48 with respect to the rear surface 28 of the holder.

[0058] The fluid passage 46 also includes a passage outlet opening 50. The passage outlet opening 50 is in fluid communication with the passage inlet opening 48. Fluid flows from the passage inlet opening 48 to the passage outlet opening 50 in the fluid passage 46, defining the forward flow direction F. F The channel outlet opening 50 is configured to discharge the fluid entering at the channel inlet opening 48. Forward flow direction F F It extends from the channel inlet opening 48 to the channel outlet opening 50 along the direction of fluid channel 46. The backward flow direction F R It is in the direction of forward flow F F The opposite direction. That is, the backward flow direction F R The passage extends from the outlet opening 50 to the inlet opening 48 in the direction along the fluid passage 46. According to some embodiments of the subject matter of this application, although the fluid flows through the turbine, the forward flow direction FF and the backward flow direction FR can be substantially linear. The outlet opening 50 can be located at the cutting portion 36 or at the front end 24 of the tool holder 22.

[0059] Special reference Figure 3 and Figure 4 The fluid passage 46 includes a passage turbine chamber 52. That is, the passage turbine chamber 52 is located within the fluid passage 46 and forms a portion of the fluid passage 46. As described later in this specification, the passage turbine chamber 52 is designed to accommodate at least a turbine. The passage turbine chamber 52 is located between the passage inlet opening 48 and the passage outlet opening 50. According to some embodiments of the subject matter of this application, the rotary cutting tool 20 may include a turbine socket portion 53 that is separable from and located within the tool holder 22. The passage turbine chamber 52 may be formed within the turbine socket portion 53. The passage turbine chamber 52 may be located between the rear end 24 of the tool holder 22 and the cutting portion receiving portion 35. The passage turbine chamber 52 may be aligned with the tool's central axis A. In other words, the passage turbine chamber 52 may be centered about and intersect with the tool's central axis A. Therefore, the turbine located in the passage turbine chamber 52 is also aligned with the tool's central axis A, allowing the rotary cutting tool 20 to be balanced.

[0060] According to some embodiments of the subject matter of this application, the fluid passage 46 may include a passage turbine inlet chamber 54, the passage turbine inlet chamber 54 being adjacent to the passage turbine chamber 52 and relative to the forward flow direction F R Located behind it. That is, the channel turbine front chamber 54 is relative to the forward flow direction F. F Before the channel turbine chamber 52, in a radial section taken in a plane perpendicular to the tool center axis A passing through the fluid channel 46, the cross-sectional area of ​​the fluid channel 46 at the channel turbine chamber 52 may be larger than the cross-sectional area at the channel turbine inlet chamber 54. Similar to the channel turbine chamber 52, the channel turbine inlet chamber 54 may be aligned with the tool center axis A. In other words, the channel turbine inlet chamber 54 may be centered about and intersect with the tool center axis A. The channel turbine chamber 52 and the channel turbine inlet chamber 54 are preferably cylindrical, although at least the channel turbine inlet chamber 54 may be cylindrical in the forward flow direction F. F A cone with a taper at the top.

[0061] According to some embodiments of the subject matter of this application, the fluid passage 46 may include a passage turbine rear chamber 56, which is adjacent to the passage turbine chamber 52 and is relative to the forward flow direction F. F Located in front of it. The channel turbine rear chamber 56 can be separated from the channel turbine chamber 52 via an annular groove 57. In a radial section taken in a plane perpendicular to the tool center axis A passing through the fluid channel 46, the cross-sectional area of ​​the fluid channel 46 at the foremost portion of the channel turbine chamber 52 may be smaller than the cross-sectional area at the channel turbine rear chamber 56. The cutting portion receiving portion 35 and / or the tapered recess 45 may be located in the rearward direction D. R The cutting portion 36 extends into the channel turbine rear chamber 56. The cutting portion 36 may extend into the channel turbine chamber 52. The cutting portion 36 may be spaced apart from the turbine 60.

[0062] The rotary cutting tool 20 includes an energy harvesting arrangement 58. The energy harvesting arrangement 58 is configured to harvest electrical energy. Such energy harvesting can be used, for example, to power electrical arrangements such as sensors and / or rechargeable batteries (optionally configured to power such sensors). In the latter case, this avoids the need to replace the battery, which can be done simply by stopping the cutting operation.

[0063] Reference Figure 4 The energy harvesting arrangement 58 includes a turbine 60. The turbine 60 is located within a fluid passage 46 at a channel turbine chamber 52. In other words, the turbine 60 is located within a channel turbine chamber 52. The turbine 60 is configured to respond to a forward flow direction F from the channel inlet opening 48. FThe turbine 60 rotates due to the flow of fluid to the channel outlet opening 50. According to some embodiments of the subject matter of this application, the turbine 60 may include a plurality of radially extending turbine blades 62. The plurality of radially extending turbine blades 62 may be made of metal, and in particular, the plurality of radially extending turbine blades 62 may be made of aluminum. Advantageously, this configuration provides the turbine blades 62 with sufficient strength and stiffness to prevent breakage or bending.

[0064] According to some embodiments of the subject matter of this application, the energy harvesting arrangement 58 may also include an electric generator 64 driveably connected to the turbine 60. The electric generator 64 may be located in the passage turbine chamber 52. The electric generator 64 can be used to supply power to the electrical arrangement.

[0065] According to some embodiments of the subject matter of this application, the energy harvesting arrangement 58 may include two cables 66 extending from the electric generator 64 and terminating at two electrical connectors 70 mounted on the tool holder 22. A portion of each of the two cables 66 may be located in a fluid passage 46. Specifically, a portion of each of the two cables 66 extending directly (i.e., adjacent) from the turbine 60 may be located in the fluid passage 46. It is understood that a single electrical cable carrying both wires and extending from the generator to a single electrical connector having two terminals may also be used.

[0066] According to some embodiments of the subject matter of this application, the rotary cutting tool 20 may include an electrical arrangement 72. Two electrical connectors 70 may be located at the electrical arrangement 72. When the turbine 62 rotates, an electric generator 64 outputs electrical energy via two cables 66 to power the electrical arrangement 72. In other words, the electric generator 64 may be electrically connected to the electrical arrangement 72. The electrical arrangement 72 may be a sensor designed to monitor the condition of the cutting tool and / or cutting operation. For example, the sensor may determine that the cutting portion 36 is axially pulled out of the cutting portion receiving portion 35. Alternatively or additionally, the electrical arrangement 72 may include a rechargeable battery designed to power, for example, a sensor. Advantageously, such a configuration avoids the need for the user to stop the tool to replace the battery when such a sensor is powered by a non-rechargeable battery.

[0067] According to some embodiments of the subject matter of this application, the outer peripheral surface 32 of the retainer may include a retainer lateral recess 68 therein. An electrical arrangement 72 may be located in the retainer lateral recess 68, thereby protecting the electrical arrangement 72 from impacts by, for example, cut-off chips.

[0068] Reference Figure 3 and Figure 4According to some embodiments of the subject matter of this application, the fluid channel 46 may extend into the cutting portion 36. Therefore, the channel outlet opening 50 may be located at the cutting portion 36. Specifically, the channel outlet opening 50 may be located at the foremost cutting surface 76 of the cutting portion 36. That is, the fluid channel 46 may open at the channel outlet opening 50 regarding the foremost cutting surface 76. The channel outlet opening 50 may be oriented to discharge fluid near the cutting edge 38. The channel outlet opening 50 may be positioned adjacent to the cutting edge 36. The channel outlet opening 50 may extend in the forward direction D. F Oriented towards. That is, the normal to the plane defined by the channel outlet opening 50 may extend generally parallel to the tool's central axis A. In a configuration including the clamping nut 42 and the collet 44, the fluid channel 46 may pass through the front surface 30 of the retainer at the tapered recess 45. The channel outlet opening 50 may be located at the collet 44 and / or the clamping nut 42 (not shown).

[0069] According to some embodiments of the subject matter of this application, the rotary cutting tool 20 does not have secondary channels having their own inlet and outlet. That is, the rotary cutting tool 20 has only a single channel inlet opening 48 and a single channel outlet opening 50 (i.e., the rotary cutting tool 20 includes a single (i.e., exactly one) fluid channel 46). Furthermore, as shown, for example, in EP2095897, the fluid channel 46 may not branch between the channel inlet opening 48 and the channel outlet opening 50 (so that it is open with respect to another outlet). Thus, advantageously, the single fluid channel 46 is used to deliver coolant to the cutting edge 38 and also to deliver fluid to actuate the turbine 60.

[0070] Although the subject matter of this application has been described to a certain degree of specificity, it should be understood that various changes and modifications may be made without departing from the spirit or scope of the invention as claimed below.

Claims

1. A rotary cutting tool (20) having a tool center axis (A) defining opposite forward (D F ) and rearward (D R ) directions, and being rotatable about the tool center axis (A), the rotary cutting tool (20) comprising: Tool holder (22) includes a mounting portion (34) and a cutting portion receiving portion (35) located at opposite rear ends (24) and front ends (26) of the tool holder (22), respectively; A cutting portion (36) releasably attached to the cutting portion receiving portion (35), the cutting portion (36) including a cutting edge (38); Fluid channel (46), comprising: a) A channel inlet opening (48) located at the mounting portion (34) and configured to receive a fluid supply; b) A channel outlet opening (50) which is in fluid communication with the channel inlet opening (48) and configured to discharge fluid entering at the channel inlet opening (48); and c) The channel turbine chamber (52) located between the channel inlet opening (48) and the channel outlet opening (50); Energy harvesting arrangement (58), which includes: A turbine (60) located in the channel turbine chamber (52) is configured to flow from the channel inlet opening (48) along the forward flow direction (F). F The fluid flowing to the channel outlet opening (50) rotates, wherein: The channel outlet opening (50) is located at the cutting portion (36) and oriented to discharge the fluid entering at the channel inlet opening (48) as coolant near the cutting edge (38) after the fluid has caused the turbine (60) to rotate; and A turbine socket portion (53) is detachable from and located within the tool holder (22); wherein the channel turbine chamber (52) is formed within the turbine socket portion (53).

2. The rotary cutting tool (20) according to claim 1, wherein, The rotary cutting tool (20) includes a single fluid channel (46).

3. The rotary cutting tool (20) according to claim 1, wherein, The rotary cutting tool (20) has only a single channel inlet opening (48) and a single channel outlet opening (50), and the fluid channel (46) does not branch between the channel inlet opening (48) and the channel outlet opening (50).

4. The rotary cutting tool (20) according to claim 1, wherein, The fluid channel (46) is a through channel formed within the rotary cutting tool (20).

5. The rotary cutting tool (20) according to claim 1, wherein, The cutting portion (36) is integrally formed to have an integral, one-piece structure.

6. The rotary cutting tool (20) according to claim 1, wherein, The tool holder (22) is integrated to have an integral, one-piece construction.

7. The rotary cutting tool (20) according to claim 1, wherein: The tool holder (22) includes a rear surface (28) and a front surface (30) of the holder, and a peripheral surface (32) of the holder extending between the rear surface (28) and the front surface (30) of the holder about the central axis (A) of the tool; The rear surface (28) of the retainer is located at the rear end (24) of the rotary cutting tool (20); and The channel inlet opening (48) is located on the rear surface (28) of the retainer.

8. The rotary cutting tool (20) according to claim 7, wherein, The fluid channel (46) passes through the front surface (30) of the retainer.

9. The rotary cutting tool (20) according to claim 1, further comprising a fastening arrangement (40), the fastening arrangement (40) comprising a clamping nut (42) and a collet (44); wherein: The cutting portion (36) is releasably attached to the tool holder (22) by means of the clamping nut (42) and the chuck (44).

10. The rotary cutting tool (20) according to claim 1, wherein: The fluid passage (46) includes a passage turbine inlet chamber (54), which is adjacent to the passage turbine chamber (52) and relative to the forward flow direction (F). F ) is located behind it; as well as In a radial section taken in a plane perpendicular to the tool's central axis (A) passing through the fluid passage (46), the cross-sectional area of ​​the fluid passage (46) at the passage turbine chamber (52) is greater than the cross-sectional area at the passage turbine front chamber (54).

11. The rotary cutting tool (20) according to claim 1, wherein: The fluid passage (46) includes a passage turbine rear chamber (56) that is adjacent to the passage turbine chamber (52) and relative to the forward flow direction (F). F ) is located in front of it; as well as The cutting portion (36) extends into the rear chamber (56) of the channel turbine and is spaced apart from the turbine (60).

12. The rotary cutting tool (20) according to claim 1, wherein, The channel turbine chamber (52) is aligned with the tool's central axis (A).

13. The rotary cutting tool (20) according to claim 1, wherein: The tool holder (22) includes a rear surface (28) and a front surface (30), and a peripheral surface (32) extending between the rear surface (28) and the front surface (30) about the central axis (A) of the tool, the rear surface (28) being located at the rear end (24) of the rotary cutting tool (20); The outer peripheral surface (32) of the retainer includes a retainer lateral recess (68) therein; The rotary cutting tool (20) includes an electrical arrangement (72) with two electrical connectors (70) located at the electrical arrangement (72); and The electrical arrangement (72) is located in the lateral recess (68) of the retainer.

14. The rotary cutting tool (20) according to claim 1, wherein, The fluid channel (46) includes a tool center axis (A) that extends through the tool holder (22) along the entire length of the fluid channel (46).

15. The rotary cutting tool (20) according to claim 14, wherein, The fluid channel (46) includes a tool center axis (A) that extends along the entire length of the fluid channel (46) through both the tool holder (22) and the cutting portion (36).

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