BOOK_CONTENT
From The Geometrical Tolerancing Desk Reference: Creating and Interpreting ISO Standard Technical Drawings

Chapter List

Chapter 20: Quick Reference Tables

Angularity

Description:

Defines the required condition of a at a surface at a specific angle (except 90 ) from a datum

Form

Orientation

Run-out

Location

Median plane plane or surface or Axis

Yes

No

Axis or Plane

Related

Single

True (exact position)

Tolerance type

?

What is controlled

?

Datum needed

?

What is the datum

?

For features that are

?

Notes: angle dimensions to be

?

Circular Run-Out

Description:

Circular run-out defines how much an actual circular element can deviate from the required form (and orientation) during one complete revolution about the datum axis

Form

Orientation

Run-out

Location

Circular element

Yes

No

Axis

Related

Single

Tolerance type

?

What is controlled

?

Datum needed

?

What is the datum

?

For features that are

?

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Form Gages and Form Gaging Systems
Form gages and form gaging systems are used to inspect parameters such as roundness, angularity, squareness, straightness, flatness, runout, taper and concentricity. 
Polarimeters
Polarimeters determine the amount of polarization of light.
Surface Metrology Equipment
Surface metrology equipment is used to measure the surface finish and/or geometry of engineering components. Surface texture and topology characteristics include surface roughness, contour, form, waviness, and defects.
Round Belt Pulleys
Round belt or pulleys are used in mechanical lifts and transmissions with o-rings, round belts, cables, ropes, or wires.
Antennas
Antennas are structures or devices used to collect or radiate electromagnetic waves.

Topics of Interest

Chapter List Chapter 21: Visual Index Chapter 22: Index A ACS 22 Angularity 18, 45, 68-74, 155, 173-174 Angular dimensions 64 Any cross-section 22 All around 22, 27 Area contact 34 Arrowhead...

Table 4.1: Geometrie characteristic symbols Features Tolerance type Characteristic Symbol Page For single features (not related to a datum) Form Cylindricity 89 Flatness 90 to 92 Profile...

When the toleranced feature is related to a datum, a datum letter(s) is shown in the tolerance frame. The datum is represented on the drawing in the following way: Figure 6.1: Datum symbol Location...

18.2 Terms Embodiment Measuring is comparing. In order to measure geometrical deviations, the workpiece surface must be compared with a geometrical ideal feature. But geometrical ideal features cannot...

Squareness or perpendicularity is a measure of variation of the part's surface from a 90° angle to the reference surface. Squareness can be measured by determining the deviation of the part's surface...