#aleza

• Mechanical fit — The structural, dimensional, and functional relationship established following the assembly of two complementary parts (an encompassing one called a bore and an encompassed one called a shaft) that share the same nominal dimensions; by extension, the state of clearance or interference resulting from the actual difference in their dimensions prior to mounting. This micro-precise phenomenon is governed by rigorous standardized tolerances, determining exactly whether the components will move freely relative to one another or remain rigidly locked to transmit large mechanical forces within an industrial assembly.
• To ream — To enlarge, calibrate, or precisely finish a previously drilled cylindrical or conical hole in a piece of metal, wood, or other hard material, using a special tool called a reamer or on a boring machine. The purpose of this operation is to obtain a perfectly smooth inner surface with exact dimensions and minimal geometric tolerances to allow precise assembly of parts.
• Bore — The internal diameter of an engine cylinder, a pipe, or any tubular part machined by turning or drilling; by extension, the internal cylindrical cavity itself in which a piston or shaft moves. This geometric parameter is fundamental in determining the displacement, compression ratio, and overall performance of internal combustion engines or hydraulic systems.
• Chestnut — A specialized term used to describe a horse that has a coat (body hair, tail, and mane) of a reddish, chestnut, or yellowish color, without any black hairs. As a noun, it designates a equine specimen with this specific chromatic characteristic. The coat color is genetically determined and represents one of the four base colors in traditional hippological classification.
• Reaming — The act of reaming or boring and its result; a technological machining process of internal cylindrical or conical surfaces, executed to enlarge the diameter of an existing hole and to ensure extremely high dimensional precision and minimal surface roughness. This process is essential in machine manufacturing for calibrating cylinders, bearings, and bushings.
• 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.
• Boring out — The act of boring out or reaming and its result; an informal or regional term equivalent to 'alezare', describing the industrial or artisan process of enlarging and calibrating an internal cylindrical cavity. Although it is avoided in academic technical manuals in favor of the literary noun 'alezare', the word is widely understood and used in metalworking and mechanical repair shops in Romania.
• 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.