#alezat

• Bored — Regarding a cylindrical hole or a tubular part: that has undergone the reaming or boring operation, having its internal diameter enlarged, calibrated, and finished according to exact technical dimensions. As an adjective, it describes the final state of geometric precision of a machined internal cavity, ready to receive a perfectly matching shaft or piston.
• Reamer — A multi-edged cutting tool, featuring multiple longitudinal or helical cutting edges, used in metalworking for the fine finishing and exact calibration of holes previously made with a drill bit. This instrument ensures high dimensional precision (at a micron level) and superior inner surface smoothness, being indispensable in building engines, bearing housings, and aerospace components.
• Bored — Having undergone the process of boring or reaming; a cylinder, tube, or mechanical part whose internal surfaces have been machined by cutting with a reamer to achieve high dimensional accuracy and superior smoothness. In an extended sense, it describes the state of a geometric hole calibrated according to rigorous technical tolerance standards.