2014年12月23日 · Your primary datum feature |A-B| is defined by two offset planes to create a single plane, these two planes should be located basically relative to one another and …

A datum feature can be a plane, line, or point, which needs to be used selectively depending on the tolerance and feature you need to specify. This page explains the indication symbols and …

A datum reference or just datum (plural: datums [Note 1]) is some geometrically important part of an object—such as a point, line, plane, hole, set of holes, or pair of surfaces—that serves as a …

2022年4月4日 · What is a Datum Reference Frame? Datums are used in Geometric Dimensioning and Tolerancing drawings to create a reference system for inspecting a manufactured part. …

2025年1月2日 · A datum is an idealized geometric reference point, line or plane. However, a datum feature is the physical part of the component which defines this reference. In theory, …

2023年4月11日 · ASME Y14.5 (1994) defines a datum as “A theoretically exact point, axis, or plane derived from the true geometric counterpart of a specified datum feature. A datum is an …

Datum reference frame (DRF): A datum reference frame is three mutually perpendicular intersecting datum planes. The datum reference frame establishes a shared set of orthogonal …

A datum is a theoretical reference point, line, or plane used to define where measurements and controls should originate on a part. Datums are critical because they establish a consistent …

A datum is a plane, a straight line, or a point that is used as a reference when processing a material or measuring the dimensions of a target. A datum is defined as follows in the ISO …

2017年5月21日 · A datum plane is a horizontal or vertical reference point on which surface elevations are based. Though the location of a datum plane is precise, its placement is …