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Fundamentals
of GD&T Web-Based Training
Based
on ASME Y14.5M-1994
Goals and Objectives
Lesson
14: Orientation Controls
Goal: Understand the basics of orientation controls.
- Describe when
to use each orientation control.
- Describe what
controls the tolerance on implied 90° angles.
- Describe how
parallelism is controlled when no symbol is shown.
- Explain the definition
of perpendicularity.
- Explain the definition
of angularity.
- Explain the definition
of parallelism.
- Describe the
common tolerance zones for orientation controls.
- List two requirements
for orientation controls.
- List two indirect orientation controls.
Lesson
15: Perpendicularity
Goal: Interpret the perpendicularity control.
- List two common
tolerance zones for a perpendicularity control.
- List two requirements
of a perpendicularity control.
- Describe the
tolerance zone for a perpendicularity control applied to a surface.
- Explain how a
perpendicularity control applied to a surface affects its flatness.
- Explain the effect
of applying a perpendicularity control to a feature of size.
- Explain how to
specify a cylindrical tolerance zone for a perpendicularity control.
- Explain the tolerance
zone when a perpendicularity control is applied to a cylindrical feature
of size.
- Explain the effects
of a MMC modifier in a perpendicularity control.
- Describe the
gage for an application using a perpendicularity control applied at
MMC.
- Describe two common applications for a perpendicularity control.
Lesson
16: Angularity
Goal: Interpret the angularity control.
- List two common
tolerance zones for an angularity control.
- List two requirements
of an angularity control.
- Describe the
tolerance zone for an angularity control applied to a surface.
- Explain how an
angularity control applied to a surface affects its flatness.
- Explain the effect
of applying an angularity control to a feature of size.
- Explain how to
specify a cylindrical tolerance zone for an angularity control.
- Explain the tolerance
zone when an angularity control is applied to a cylindrical feature
of size.
- Describe two
applications for angularity.
- Explain how an angularity control can be inspected.
Lesson
17: Parallelism
Goal: Interpret the parallelism control.
- List two common
tolerance zones for a parallelism control.
- List two requirements
of a parallelism control.
- Describe the
tolerance zone for a parallelism control applied to a surface.
- Explain how a
parallelism control applied to a surface affects its flatness.
- Explain the effect
of applying a parallelism control to a feature of size.
- Describe how
to specify a cylindrical tolerance zone for a parallelism control.
- Interpret the
effects of specifying the tangent plane modifier with a parallelism
control.
- Describe two
applications for parallelism.
- Explain how a parallelism control can be inspected.
