A drill ring for a cylindrical core drill bit is disclosed. The drill ring includes at least two ring segments which are constructed from a sintered powder mixture and diamond particles. The diamond particles are arranged on ablation tracks in a plane perpendicular to the cylinder axis and the ring segments are connected to each other on their lateral edges.

A support assembly for a core drill which utilizes an improved high strength spoked reinforcer. The reinforcer may be removably mounted a core drill tube by fasteners. A drive connection is removably mounted and centrally located on an outer disc of a pair of discs. The drive connection is adapted to connect with a drive shaft to cause rotation of the tube. The assembly can also include a split in the disc when the high strength spoked reinforcer is not welded thereto, thereby providing a means of water control. The high strength spoked reinforcer can be a separate piece that is bolted to the disc or can be integrally formed as one piece therewith.

A wall magnet anchor system is used to install magnetic anchors in wall material that can be used to magnetically hold an object to the wall, thereby avoiding the need to a conventional hook that protrudes from the surface of the wall. The anchor can include a helical thread to hold the anchor in the wall. An installation tool includes a cutting features at one end for cutting a hole in a wall to receive an anchor, and an installation feature that engages the anchor and allows a user to drive the anchor, through rotation, into the hole cut by the cutting features.

A machining assembly with a drive unit (10) detachably mountable to the feed module (30) and moveable along a guide track on a machine stand via the feed module. The feed module is provided with a feed gear wheel (33) configured for engagement with a cog track on the machine stand. An electric drive motor (12) for rotating a spindle (13) and an electric feed motor (16) for rotating the feed gear wheel are arranged in a housing (11) of the drive unit. The drive unit comprises a drive member, which is rotatable by the feed motor and which is operatively connectable to the feed gear wheel via a torque transmitting coupling mechanism (50) when the drive unit is mounted to the feed module so as to allow the feed gear wheel to be rotated under the effect of the feed motor when the drive unit is mounted to the feed module.

Systems and methods for data security with power tools are provided. The systems and methods include transmitting an initialization command, by a processor of a computing device, to a power tool configured with a secure element. The secure element is a digital key storage unit configured to generate a private key and a corresponding public key upon receiving the initialization command. The power tool transmits the generated public key to the computing device. The computing device tags the public key with a unique identification number associated with the power tool, and stores the corresponding public key within a data storage unit.

Methods and apparatus for forming an aperture in a composite component are provided. For example, a method for forming an aperture in a ceramic matrix composite (CMC) component comprises, based on a final dimension of the aperture, selecting a tool having a tool size and a cutting surface; selecting an angle at which to cut the component with the tool; cutting a back surface of the component with the tool, the cutting surface positioned at the angle; repositioning the tool relative to the component; and cutting the aperture through to its final dimension. The tool may be a core drill with a diameter within a range of 60% to 90% of the aperture final dimension. The angle may be within a range of 10° to 60° with respect to the back surface. The aperture may be cut through to its final dimension from a front surface of the component.

A core drill bit 1 includes a tubular shaft 12, a mounting platform 31 provided on a proximal end of the tubular shaft 12 for mounting the core drill bit on a power tool 26, and an annular cutting section 2 provided with abrasive cutting segments 3 arranged at a distal end of the tubular shaft 12. A first transponder 24 is provided at the distal end of the tubular shaft 12. A repeater 28 is provided comprising a second transponder 29 at the proximal end of the tubular shaft 12, an antenna 33 facing the first transponder 24, and a wired connection 34 between the antenna 33 and the repeater 28.

A cutting section (11) which is connectable to a drill shaft section via a releasable connecting device. The cutting section includes a first open tubular element (14) which is in the form of a first hollow cylinder having a first waved, trapezoidal or zigzag-shaped cross-sectional area, a second closed tubular element (15) which is in the form of a second hollow cylinder having a circular ring-shaped cross-sectional area, and one or more drill segments (16) which are connected to the first open tubular element (14) and to the second closed tubular element (15).

A method for producing a cutting section from a closed tubular element (14) which is in the form of a hollow cylinder and from one or more drill segments (16) which are connected to the closed tubular element (14).

Systems and methods for data security with power tools are provided. The systems and methods include a power tool that generates a data package, and a secure element of the power tool that generates a unique signature for the data package with a private key. The power tool transmits the signed data package to an auxiliary device. The auxiliary device receives the signed data package, and verifies the unique signature by comparing the unique signature to a public key corresponding to the private key of the power tool. With a positive verification, the auxiliary device processes the signed data package.