GD&T 3D Modeling Final

What is GD&T?

Geometric Dimensioning and Tolerancing

How Do You Apply a Datum in SolidWorks?

using the Datum feature tool to define it as a reference for measurements and tolerances.

Feature Control Frame is?

A rectangle containing the geometric characteristics and description

What is the benefit of applying an MMC modifier to a position tolerance

Machinist gains a “Bonus Tolerance”

Add the symbol for a MMC modifier to the feature control frame below

Circle with M inside

Straightness GD&T Symbol

Flatness GD&T Symbol

Which Type of straightness is measured by a Cylindrical Gauge?

Axis

If you want a straightness tolerance zone of 0.3 in along the blue highlighted edge, What would the callout look like?

Given the flatness tolerance zone shown in the figure to the left add the GD&T flatness notion to the figure on the right

Circularity (Roundness) Symbol

Cylindricity Symbol

Fill in the annotations for Circularity

Fill in the annotations for cylindricality

What is the correct terminology used for the blue zone highlighted below?

Cylindricality

The Cylindricity tolerance zone is represented by

Two Concentric Circles

Profile of a Line GD&T Symbol

Profile of a Surface GD&T Symbol

In GD&T the profile of a line control is used to control the form and location of a line on a part. Which of the following statements best describes the profile of a line tolerance?

It controls the total variation in the surface along a specified path, with references to a datum, allowing for both form and orientation control.

Complete the diagram by drawing in the tolerance zone created by the profile of a line callout

If the profile sketch is shown as the following, What are the tolerances for external (Maximum material) and Internal (minimum material) Dims

0.1 mm external, 0.2 mm internal

If you want a tolerance to have 0.3mm only external profile on a surface how would it be written?

Angularity Symbol

Perpendicularity Symbol

Which of the following could be units of the tolerance zone created by an angular tolerance?

Inches and Millimeters

Complete the Diagram by Drawing the tolerance zone created by the angularity callout

Perpendicularity is a specific case of what other tolerance type?

Angularity

Complete the diagram by filling in the perpendicularity callout

Parallelism Symbol

What needs to be specified in order for this to be a parallelism?

Datum Point

Which of these elements can a parallel tolerance not be applied between?

Bodies

What is the difference between Position and True Position?

True Position is the theoretical actual location of the feature and Position is the tolerance the manufactured part can fall in between

If the part shown is manufactured and measured to be 22.44mm from B and 22.62mm from C, would the part pass inspection?

No, the dimension from C exceeds the  tolerance zone.

Concentricity Symbol

Position Symbol

Symmetry Symbol

Since concentricity is no longer used what should be used instead

Location

Circular Runout Symbol

Total Runout Symbol

In a driveshaft, tight circular runout protects it rom damages due to

Oscillation

Total Runout of 0.3 on a 20mm shaft what is the effectiveness range?

19.85-20.15

What is the main benefit to total Runout vs Circular runout?

it can detect variation in diameter around the whole cylinder