Dec 14, 2014 · Perpendicularity is measured using a height gauge, similar to flatness, however, the gauge (or part) is locked to a 90° datum to measure how perpendicular the surface is.

Perpendicularity, which is a regulation on the perpendicular state in comparison with the datum, is measured using measuring tools or a coordinate measuring machine. This page explains how …

Referring to the above drawing, the easiest way to measure the perpendicularity of a plane is by placing the datum plane on a granite table and gauging the controlled plane with a height gauge.

Feature Control Frame: To control the perpendicularity of a surface, a feature control frame (FCF) is used to apply the tolerance to the desired axis. The FCF contains the geometric …

Nov 16, 2021 · Both surface and axis perpendicularity are often used in engineering drawings to guarantee the desired perpendicularity. In its surface form, perpendicularity can control planar …

May 29, 2025 · Measurement methods for axis perpendicularity include coordinate measuring machines (CMM), dial indicators, or optical comparators, which check the alignment of the …

Apr 24, 2025 · In this part, we will provide comprehensive guides on how to measure perpendicularity GD&T, including the tools, steps as well as their respective advantages and …

Nov 14, 2025 · Perpendicularity is among the fundamental symbols in Geometric Dimensioning and Tolerancing (GD&T) that enforces an exact 90-degree (perpendicular) orientation of a …

Oct 12, 2017 · Measuring the perpendicularity of a surface typically requires the use of a height gage, with either the gage or the part locked to a 90° datum to determine how perpendicular …

CMMs can measure the perpendicularity of surfaces, axes, or holes with high precision by comparing the feature to the specified datum. CMMs are particularly useful in high-precision …