Views
This view shows the most detail
What is Front View?
This line is used to show edges that are visible, this line is thick and continuous line.
What is Object Line?
This is what a dimension shown on a print is called.
What is Basic Size?
This is the relationship between the sizes of the two mating parts.
What is Class of Fit?
⌀
What is Diameter?
__
What is Straightness?
◯
What is Circularity?
Total Tolerance:
.236" +/-.0035
What is .007"
This view sits above the front view in third angle projection.
What is Top View?
This line show edges that cannot be seen, this line is thin and broken into small dashes.
This condition is when a feature contains the most workpiece material within its tolerance.
What is Maximum Material Condition(MMC)?
This is the minimum amount of clearance.
What is Allowance?
⌴
What is Counterbore?
⏥
What is Flatness?
⌖
What is Position?
LMC of a Hole:
.475" +/- .0005
What is .4755"
This view sits on either side in both third and first angle projection.
This line is used for dimensioning, this line is thin and continuous with arrows on the ends.
What is Extension Line?
This condition is when a feature contains the least workpiece material within its tolerance.
What is Least Material Condition (LMC)?
This allowance provides clearance between mating parts.
What is Positive Allowance?
⌵
What is Countersink?
⊥
What is Perpendicularity?
∥
What is Parallelism?
MMC of a shaft:
.8125" +0/-.001"
What is .8125"
This view sits below the front view in third angle projection.
What is Bottom View?
This line is used for extending edges to meet dimension lines.
What is Extension Lines?
This tolerance allows a dimension to vary both above and below the basic size.
What is Bilateral Tolerance?
This allowance provides interference between mating parts.
What is Negative Allowance?
↧
What is Depth?
◎
What is Concentricity?
⌓
What is Profile of a Surface?
Convert the unilateral tolerance to a bilateral tolerance.
1.4375" +/- .005"
What is 1.4325" +.01/-0" or 1.4425" +0/-.01"
This view is the least common view.
What is Back View?
This line is angle with an arrow pointing to a feature, a dimension or note is tied to it.
What is Leader Line?
This tolerance allows a dimension to vary in only one direction from the basic size.
What is Unilateral Tolerance?
Calculate the allowance
A Shaft has a dimension of .875" +/- .001" and mates with a hole with a dimension of .873" +/- .001".
What is .004" Negative Allowance?
°
What is Degree?
⌭
What is Cylindricity?
∠
What is Angularity?
Convert the unilateral tolerance to a bilateral tolerance.
.184" +.006/-0"
What is .187" +/- .003"
This view represents the object is 3D form.
What is Isometric?
What is Cutting Plane Line?
This tolerance does not use a + or -, rather it uses the upper and lower limits that is allwed.
What is Limit Tolerance?
Calculate the allowance
A Shaft has a dimension of 1.3125" +0/-.001" and mates with a hole with a dimension of 1.3125" + .001/-0".
What is .001" Positive Allowance?
R
What is Radius?
↗
⌰
What is Total Runout?
Find the allowance.
Shaft of 1.121" + .0007/-0"
Hole of 1.121" +/- .0005"
What is .0012" Negative Allowance?