A rotary cutting tool with a shank and an interchangeable cutting tip, wherein the shank includes a pocket which receives the interchangeable cutting tip via an interference fit. The pocket includes two centering wall portions which, when viewed along a central longitudinal axis, are oriented at a first angle with respect to one another, the first angle being greater than zero. The interchangeable cutting tip is axially displaceable between: an initial position, assumed upon being received in the pocket of the shank; a clamped position, wherein the interchangeable cutting tip is fixedly held with respect to the shank; and a bump-off position, wherein the interchangeable cutting tip is not fixedly held. A holding element holds the interchangeable cutting tip in the clamped position, and a spring assembly which displaces the interchangeable cutting tip between the clamped position and the bump-off position. Other variants and embodiments are broadly contemplated herein.

A tool coupling extends along a longitudinal axis and has a first component, a second component, and a clamp for fastening the first component to the second component. The first component has a male clamping portion, the second component has a female clamping portion, and the clamp is located in an inner cavity of the second component. The male clamping portion has a first abutment region located axially rearward of a first plane perpendicular to the longitudinal axis, the inner cavity has a second abutment region located axially forward of the first plane, and the first and second abutment regions face towards the first plane. In a fastened state, a clamp first engagement region of the clamp makes clamping contact with the male clamping portion's first abutment region, and a clamp second engagement region of the clamp makes clamping contact with the inner cavity's second abutment region.

A cutting tool body is configured for securing a cutting insert with a female thread. The cutting tool body includes a machining end and a tool peripheral surface which extends therefrom. The cutting tool body further includes a through, non-threaded tool coupling bore which opens out to the tool peripheral surface and a coupling screw which has a coupling screw thread. The coupling screw is being located in the tool coupling bore and configured to secure the cutting insert. The cutting tool body further includes a holding member which engages the coupling screw thread at least when the holding member is not in contact with the cutting insert.

The present invention relates to a tool bit replaceable rotary cutting tool and a rotary cutting method and a tool bit mounting method thereof and belongs to the field of hole machining in the machining industry. At present, a twist drill for drilling is of an integrated structure, and when service life of a tool bit is exhausted, the whole drill is required to be replaced, so that cost is relatively high. For a tool bit replaceable drilling tool, in a drilling process, radial and axial acting forces on a tool bit are relatively strong and thus may cause the conditions of imprecise drilling caused by radial displacement of the tool bit at a joint and the like, a replaceable structure of the tool bit makes the joint of the tool bit of the drilling tool relatively weak and a design of a chip groove makes a substrate of the drilling tool weaker. According to the tool bit replaceable rotary cutting tool of the present invention, a tool bit is detachably connected with a tool bar, and V-shaped positioning surfaces are adopted for a joint of the tool bit and the tool bar, so that a good tool bit positioning and fixation effect is achieved, and the tool bit is unlikely to deviate; a design with different helical angles is adopted for a chip groove, so that strength of the tool bar is strengthened; due to design of cooling guide grooves, a cooling effect is improved; and the tool bit is easy to mount and dismount.

A spacer for gear hobbing machine, a gear hobbing machine incorporating same, and an associated method are provided. The spacer includes a bore. One or more adjustment members are carried by the spacer and adjustable into and out of the bore. Adjustment of the adjustment members allows for varying the position of the spacer when mounted on an arbor of the gear hobbing machine.

A drill bit comprising: a tubular shaft having a cutting tip at a first end and a drive shank at a second end, wherein the drive shank is adapted to engage with a drive motor, and wherein the cutting tip comprises an axially protruding shape. A first flute portion positioned between the cutting tip and the drive shank, wherein the first flute portion includes a first thread with a first sharpened cutting edge in a first helix; and wherein the first end of the cutting tip has a point angle greater than 135 degrees, and the cutting tip includes a cutting surface that joins to the first thread, and wherein the cutting tip act as a bit driver and has a profile, when viewed axially from the first end has one shape type.

A cutting tool assembly includes: a tool body extending in a longitudinal direction; a lower jaw extending and protruding forward from the tool body; a clamping portion disposed to be spaced apart from a top surface of the tool body; an upper jaw extending forward from the clamping portion and facing the lower jaw; an elastic connecting portion elastically connecting the tool body and the clamping portion to each other on a rear side of the clamping portion; a clamping screw penetrating the clamping portion downwardly and fastened to the tool body; and an upper coolant channel through which coolant flows, the upper coolant channel penetrating the elastic connection part, the clamping portion, and the upper jaw. In a width direction perpendicular to the longitudinal direction, a width of the clamping portion is in a range of 40% to 80% of a width of the tool body.

The invention relates to a core drill with an end portion (3) and a drill bit portion (1-2). The end portion and the drill bit portion are joinable in a watertight fashion with a sealing element (11). The sealing element (11) is provided in a space between the end portion and the drill bit portion, such that it is being compressed in a sealing fashion when the end portion and the drill bit portion are joined. The end portion and the drill bit portion are locked together with a joining element (8, 10) which achieves this locking effect when moves in the radial direction of the core drill. When the joining element moves in this direction, the end portion and the drill bit portion move towards each other. Thus the sealing element is being compressed while concurrently the end portion and the drill bit portion are joined together. This is further achieved without the joining element having to extend in the axial direction of the core drill. Typically, the joining element (8, 10) is constituted by a set screw.

A spacer for gear hobbing machine, a gear hobbing machine incorporating same, and an associated method are provided. The spacer includes a bore. One or more adjustment members are carried by the spacer and adjustable into and out of the bore. Adjustment of the adjustment members allows for varying the position of the spacer when mounted on an arbor of the gear hobbing machine.

A drilling tool with: a shaft; a seat at one end of the shaft; a drill bit, which is arranged on the seat; and a clamping section, which is provided on the shaft and can interact with the drill bit. Also provided is a tensioning screw, which is screwed into the shaft and comprises an expanding section as well as a contact section. The expanding section interacts with the clamping section, and the contact section interacts with the drill bit.