An apparatus for ensuring proper location for a cutout in a sheet of construction material, to provide for access to an electrical box, includes an electrical box locator device with a body and at least one spike. The body mounts to the front opening of the electrical box and the spike projects perpendicularly relative to the plane of the electrical box opening such that it pierces the sheet of construction material and is visible on the side of the sheet of construction material opposite the side facing the electrical box once the sheet of construction material is positioned over the opening of the electrical box so as to help in locating a cutout in the sheet of construction material for the electrical box.

A portable drilling and/or boring machine, for workpieces, in particular workpieces that make up aeroplane structures, such as airframes, wings, cabin, etc., the machine including a jig busing for guiding a machining tool, an expansible clip for blocking the jig bushing in an opening of a screen positioned on and secured to the workpiece, the screen constituting a drilling jig, and means for moving the expansible clip in order to clamp and unclamp the jig bushing and secure the machine relative to the screen, the means for moving the expansible clip relative to the jig bushing including an electric motor, the torque and position of which are controlled.

A reverse spot-facing tool for cutting a reverse spot-face in a workpiece using a reverse spot-facing cutter configured to engage a pilot shaft having a first end and a second end is disclosed. The workpiece comprises a through hole having a central axis. The reverse spot-facing tool comprises a stop configured to be located between the first end and the second end of the pilot shaft; a biasing assembly that generates a first thrust force and an equal and opposite second thrust force when the reverse spot-facing cutter is cutting the reverse spot face; and a thrust bearing configured to be positioned between the biasing assembly and the stop. When the reverse spot-facing cutter is cutting the reverse spot-face, the thrust bearing transmits the second thrust force from the biasing assembly to the stop, and the biasing assembly transmits the first thrust force to the workpiece.

An apparatus for ensuring proper location for a cutout in a sheet of construction material, to provide for access to an electrical box, includes an electrical box locator device with a body and at least one spike. The body mounts to the front opening of the electrical box and the spike projects perpendicularly relative to the plane of the electrical box opening such that it pierces the sheet of construction material and is visible on the side of the sheet of construction material opposite the side facing the electrical box once the sheet of construction material is positioned over the opening of the electrical box so as to help in locating a cutout in the sheet of construction material for the electrical box.

A reverse spot-facing tool for cutting a reverse spot-face in a workpiece using a reverse spot-facing cutter configured to engage a pilot shaft having a first end and a second end is disclosed. The workpiece comprises a through hole having a central axis. The reverse spot-facing tool comprises a stop configured to be located between the first end and the second end of the pilot shaft; a biasing assembly that generates a first thrust force and an equal and opposite second thrust force when the reverse spot-facing cutter is cutting the reverse spot face; and a thrust bearing configured to be positioned between the biasing assembly and the stop. When the reverse spot-facing cutter is cutting the reverse spot-face, the thrust bearing transmits the second thrust force from the biasing assembly to the stop, and the biasing assembly transmits the first thrust force to the workpiece.

A reverse spot-facing tool for cutting a reverse spot-face in a workpiece using a reverse spot-facing cutter configured to engage a pilot shaft having a first end and a second end is disclosed. The workpiece comprises a through hole having a central axis. The reverse spot-facing tool comprises a stop configured to be located between the first end and the second end of the pilot shaft; a biasing assembly that generates a first thrust force and an equal and opposite second thrust force when the reverse spot-facing cutter is cutting the reverse spot face; and a thrust bearing configured to be positioned between the biasing assembly and the stop. When the reverse spot-facing cutter is cutting the reverse spot-face, the thrust bearing transmits the second thrust force from the biasing assembly to the stop, and the biasing assembly transmits the first thrust force to the workpiece.

The invention relates to a portable drilling and/or boring machine, for workpieces (8), in particular workpieces that make up aeroplane structures, such as airframes, wings, cabin, the machine comprising: a jig bushing (3) for guiding a machining tool; an expansible clip (4) for blocking the jig bushing in an opening of a screen (5) positioned on and secured to the workpiece, said screen constituting a drilling jig; and a means for moving the expansible clip (4) in order to clamp and unclamp the jig bushing and secure the machine relative to the screen; the means for moving the expansible clip (4) relative to the jig bushing (3) includes an electric motor (1) the torque and position of which are controlled.

A reverse spot-facing tool for cutting a reverse spot-face in a workpiece using a reverse spot-facing cutter configured to engage a pilot shaft having a first end and a second end is disclosed. The workpiece comprises a through hole having a central axis. The reverse spot-facing tool comprises a stop configured to be located between the first end and the second end of the pilot shaft; a biasing assembly that generates a first thrust force and an equal and opposite second thrust force when the reverse spot-facing cutter is cutting the reverse spot face; and a thrust bearing configured to be positioned between the biasing assembly and the stop. When the reverse spot-facing cutter is cutting the reverse spot-face, the thrust bearing transmits the second thrust force from the biasing assembly to the stop, and the biasing assembly transmits the first thrust force to the workpiece.