GD&T ETS5

What does GD&T stand for?

• Geometry, dimension and tolerance

• Geometric dimensioning and tolerancing

• Geometric dimensional and tolerancing

• Geometry, dimensioning and tolerancing

GD&T can be used for

• Computers are used in design and manufacture

• Risk of a part being made

• Part features are critical to function

• Parts such as washers and nuts

This symbol stands for

(a)  

This symbols stands for

(a)  

How many datums are there?

• 1

• 2

• 3

• 4

What characteristics are there for a secondary datum?

• Perpendicular to the primary datum feature

• The part must contact this plane at least at one point

• Must be at a 90° angle to the primary datum plane

• May not be applied to center lines, center planes or axes

How many boxes does a feature control frame have?

• 3

• 4

• 5

• 7

MMC stands for

(a)  

GD&T is the universal language for communicating

• a part's most critical features

• best assembly scenario

• engineering design specifications

• how to prevent assembly errors

The advantages of GD&T can be

• less waste

• cost savings

• efficient designs

• fewer arguments