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Dimensioning Exercise - Skip advanced topic Dimensioning...

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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning 4-5) Dimensioning and Locating Advanced Features Skip advanced topic
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) If space is at a minimum, the size and location of a radii may be given by using a false center and jogged dimensions. False center Jogged dims
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) Solid parts that have rounded ends are dimensioned by giving their overall dimensions. If the ends are partially rounded , the radii are also given.
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) Solid parts that have rounded ends are dimensioned by giving their overall dimensions. For fully rounded ends, the radii are indicated but the value is not given.
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) Slots are dimensioned by giving their overall dimensions. The radii are indicated but the value is not given.
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) Or, by giving the overall width and the distance between centers. The radii are indicated but the value is not given.
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) The length of an arc is dimensioned using the arc length symbol .
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) Equally spaced features are specified by giving the number of spaces followed by the repeated feature symbol “X”, a space, and then the dimension value. # of spaces Space dim
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) One space may be dimensioned and given as a reference value.
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) If a part is symmetric, it is only necessary to dimension to one side of the center line of symmetry. Symmetry symbol
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) Counterbored holes Drill DIA C’Bore DIA C’Bore depth
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) If the thickness of the material below the counterbore is significant, this thickness rather than the counterbore depth is given.
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Copyright © 2008 by K. Plantenberg Restricted use only Application Question 4-1 What do you think a counterbored hole is used for?
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) Spotfaced Holes: The difference between a C’BORE and a Spotface is that the machining operation occurs on a curved surface. Notice that the depth can not be specified in the note.
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Copyright © 2008 by K. Plantenberg Restricted use only Dimensioning Features a) Countersunk Holes Drill DIA Drill Depth C’Sink DIA C’Sink angle Space
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Copyright © 2008 by K. Plantenberg Restricted use only Application Question 4-2 What do you think a countersunk hole is used for?
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Copyright © 2008 by K. Plantenberg
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