Device for use in drilling, method for drilling, and method for preparing a workpiece or an arrangement of workpieces for drilling

A method for drilling using a drilling unit, wherein the drilling unit comprises a bush inside which a drill bit can advance and retract relative to the bush, the bush being provided with an opening from which the drill bit can protrude towards a workpiece or an arrangement of workpieces,

• wherein the method comprises drilling by the drill bit including drilling through a device, and wherein drilling through the device comprises removing material of the device,
• wherein the workpiece or the arrangement of workpieces comprises at least two layers of material which form a stacked arrangement, wherein prior to drilling, a first layer of the stacked arrangement comprises the pre-drilled pilot hole, and wherein prior to drilling, a second layer of the stacked arrangement covers the pre-drilled pilot hole on one side of the first layer,
• wherein the device comprises a first portion formed so as to fit into the opening of the bush and wherein the device comprises a second portion formed so as to fit into and be inserted into a pre-drilled pilot hole in the workpiece or in at least one workpiece of the arrangement,
• the device being a device for one-time use, and
• the first portion being arranged within the opening and the second portion being arranged within the pre-drilled pilot hole.

A method for preparing a workpiece or an arrangement of workpieces for drilling, comprising inserting a second portion of a device being adapted to be used in cooperation with a drilling unit that comprises a bush inside which a drill bit can advance and retract relative to the bush, the bush being provided with an opening from which the drill bit can protrude towards a workpiece or an arrangement of workpieces, the device comprising a first portion which is formed so as to fit into the opening of the bush, and the device comprising the second portion which is formed so as to fit into a pre-drilled pilot hole in the workpiece or in at least one workpiece of the arrangement and to be inserted into the pre-drilled pilot hole, into a pre-drilled pilot hole in the workpiece or in at least one workpiece of the arrangement, thereby providing a workpiece or an arrangement of workpieces that is pre-equipped with the device for a drilling operation to be performed;

• wherein the device is a device for one-time use;
• wherein the first and second portions are arranged such that, during drilling into or through the workpiece or arrangement of workpieces using the drill bit, material of the device is removed by drilling through the device when the device is used in cooperation with the drilling unit;
• and
• wherein the device further comprises a disc-shaped portion, the first and second portions axially extending from opposite sides of the disc-shaped portion.