BAER Encyclopaedia

D

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Diameter

The diameter is the distance across the centre of a round (cylindrical) cross-section – e.g. in screws, drills, threads.

Die

A die is a tool for cutting external threads on rods or bolts – typically as a ring- or segment-shaped tool that is placed around the material.

Dimension

The dimension describes the geometric specifications of a tool or component – e.g. length, diameter or thread depth. Precise dimensions are crucial when tapping threads.

Dimensional Accuracy

Dimensional accuracy means that a workpiece or thread has been manufactured within the specified dimensions and tolerances – i.e. cross-section, diameter, pitch, etc. are correct.