Embodiments generally relate to an alignment device to assist in drilling or reaming an opening in a structure. The device comprises: a base element, the base element having at least one first fixation element to allow fixation of the device relative to the structure; a positioning element coupled to the base element, wherein a position of the positioning element relative to the base element is adjustable; an alignment element mounted to the positioning element and rotatable in at least two dimensions to allow precise alignment for a drilling or reaming tool with a drilling or reaming site on the structure; at least one second fixation element to allow fixation of the positioning element relative to the base element; and at least one third fixation element to allow fixation of the alignment element relative to the positioning element.

A drill press comprises a hollow pillar with a base, a holder for a drill slidably mounted on the pillar and a clamp integral to the pillar for clamping the base to a work piece so that the drill is guided to the work piece. The clamp is a G clamp with a jaw held by an arm which engages a screw thread shaft housed in the pillar so that rotating the shaft raises and lowers the arm and the jaw.

A method for performing operations on a structure. A moveable platform may be positioned in an area relative to the structure to define a working envelope. The moveable platform may be connected to a tool that may be moved around a plurality of axes within the working envelope using the moveable platform. The tool may be moved to a plurality of locations within the working envelope using the moveable platform. An operation may be performed with the tool through the working envelope at each of the plurality of locations using the moveable platform.

A magnetic base for an electric power tool, in particular for a magnetic core drilling machine. The magnetic base having a base body, in which at least one first solenoid coil forming an electromagnet is accommodated in a receiving space, whose magnetic force is switchable between a maximum resulting holding force and a minimum resulting holding force. A first side that is adapted to be coupled with the electric power tool. An oppositely situated second side, which is adapted to be placed on a workpiece to be processed. The receiving space is designed such that an insertion of the at least one solenoid coil into the receiving space is possible only from the first side.