Section Views
This type of section is created when the cutting plane passes entirely through the object
What is a full section?
This word simply means "additional" or "supplemental"
What is auxiliary?
The term used to describe the shape of the ridges or grooves that form the threads (Unified, ACME, etc.)
What is thread form?
The term indicated by the symbol "R"
What is radius?
The total amount by which a dimension can vary
What is tolerance?
This type of section is drawn when the essential internal features do not appear on one flat plane through the object
What is an offset section?
An auxiliary view that is projected from a principal view
What is a primary auxiliary view?
How far a thread advances when the threaded part is rotated one complete revolution
What is lead?
Dimensions are placed so they read from the bottom of the drawing, all reading in the same direction
What is unidirectional dimensioning?
In this practice, tolerances are expressed by showing the maximum and minimum dimensions of the part
What is limit dimensioning?
This type of section is created when a small portion of the part is exposed to show the interior construction
What is a broken-out section?
An auxiliary view that is projected from a primary auxiliary view
What is a secondary auxiliary view?
The distance from one point on a thread to the same point on the next thread
What is pitch?
These dimensions are not toleranced and are not to be used for layout, machining, or inspection operations
What are reference dimensions?
These dimensions are theoretically exact, and are often shown as a dimension within a rectangular box
What are basic dimensions?
This type of section is used on large views with a lot of surface area, making the drawing easier to read
What is an outline section?
This type of auxiliary view is projected from the top view
What is a height auxiliary view?
A general way to specify the level of precision for thread fit (1A for loosest fit, 2A for general purposes, 3A for tightest fit)
What are thread classes?
In this practice, features are dimensioned in the view that is most descriptive of the feature's shape
What is contour dimensioning?
This is the size limit value of the feature when the most material is present
What is the Maximum Material Condition (MMC)?
This type of section is normally drawn for a cylindrical object with an odd number of features
What is an aligned section?
The term for the true angle between two surfaces
What is dihedral angle?
The term for a thread when the lead equals the pitch of the thread
What is a single-start thread?
In this practice, using the bracket method, both inch and millimeter values are shown for the dimensional values on the drawing
What is dual dimensioning?
In this system, the hole and shaft tolerances are based on hole size at MMC, and are specified for different "levels of fit" such as Running Clearance (RC) fit, etc.
What is the basic hole system?