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.

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 center locator is operated with a hole center for enlarging a round opening and includes a center seat having a through hole centrally defined therein, wherein the through hole is adapted to allow a centering drill of the hole cutter extending through the center seat. At least one adjusting device is longitudinally mounted to the center seat and formed with an engaging portion, wherein the at least one adjusting device is expandable relative to the center seat for adjusting a distance between the engaging portion of the at least one adjusting device and a center of the center seat.

A center locator is operated with a hole center for enlarging a round opening and includes a center seat having a through hole centrally defined therein, wherein the through hole is adapted to allow a centering drill of the hole cutter extending through the center seat. At least one adjusting device is longitudinally mounted to the center seat and formed with an engaging portion, wherein the at least one adjusting device is expandable relative to the center seat for adjusting a distance between the engaging portion of the at least one adjusting device and a center of the center seat.

A drilling system includes a drilling machine, configured to drill a hole in a work piece along a drilling axis, a deployment mechanism, attached to the drilling machine, a measuring probe, attached to the deployment mechanism, and a controller, coupled to the drilling machine, the measuring probe, and the deployment mechanism. The measuring probe is configured to produce a signal indicative of an actual geometric parameter of the hole when inserted therein. The deployment mechanism is configured to selectively align the measuring probe along the drilling axis. The controller is configured to cause insertion of the measuring probe into the hole, and to receive the signal from the measuring probe.

The disclosure relates to a wall installation (10) comprising at least first and second uprights (20, 120) configured to receive removably respective first and second fastener devices (84, 86) of a storage accessory (80), the first and second fastener devices being spaced apart from each other by a first distance (d), the first and second uprights respectively including at least first and second top fastener means (40, 140) configured to fasten the first and second uprights to a wall (M).

The disclosure is characterized by the fact that at least the first upright further includes at least first registering means (48), the first registering means and the first top fastener means being spaced apart from each other by the first distance (d).

A drilling apparatus includes: a drill rotatable about a center axis and capable of advancing and retracting along the axis; and a pressing unit for pressing a work in an advancing direction of the drill. The drilling apparatus advances the drill while rotating the drill about the center axis to form a hole in the work, in a state in which the work is pressed by the pressing unit. A pressing force applied on the work by the pressing unit is set to a predetermined pressing force based on machining reaction applied to the drill from the work during drilling and the pressing force causing deformation of the work in the advancing direction of the drill. The predetermined pressing force can suppress deformation of the work and displacement of the drill due to the machining reaction. The machining reaction and the pressing force are calculated beforehand in a drilling test.

A method and apparatus for center height alignment of a boring bar is disclosed. The apparatus includes a seat member with a bottom and a back, and a digital angle gauge mounted to the seat member. The method includes the steps of: assembling an apparatus comprising a seat member and a digital angle gauge; calibrating the apparatus such that a Display of the digital angle gauge reads zero degrees; and aligning the center height of the boring bar by rotating the boring bar such that the Display of the digital angle gauge reads zero degrees when the apparatus is mounted onto the boring bar.

Disclosed is a technique of achieving weight reduction of a forged rotary body while improving productivity of the forged rotary body. Temporary center holes are set for each of two or more samples extracted from one forging lot of a plurality of forged rotary bodies produced within a time period after a die misalignment adjustment through before a next die misalignment adjustment. Then, a virtual final shape of each of the samples is simulated on an assumption that machining is performed on the basis of the temporary center holes, and a rotational imbalance amount is calculated. Then, an average value of the rotational imbalance amounts in all of the samples in the same forging lot is calculated, and center-hole positions which allow the average value to become zero are set as center hole machining positions for all of the forged rotary bodies in a corresponding forging lot.

Disclosed is a technique of achieving weight reduction of a forged rotary body while improving productivity of the forged rotary body. Temporary center holes are set for each of two or more samples extracted from one forging lot of a plurality of forged rotary bodies produced within a time period after a die misalignment adjustment through before a next die misalignment adjustment. Then, a virtual final shape of each of the samples is simulated on an assumption that machining is performed on the basis of the temporary center holes, and a rotational imbalance amount is calculated. Then, an average value of the rotational imbalance amounts in all of the samples in the same forging lot is calculated, and center-hole positions which allow the average value to become zero are set as center hole machining positions for all of the forged rotary bodies in a corresponding forging lot.