Dimensioning Rules Flashcards
(17 cards)
How much Offset from Origin?
1-2mm “Gap”
How long extension beyond dimension line
2-3mm “tail”
Name 2 options for Placing Dimension Numerals
1: Preferred (Unidirectional) System (All Numbers are Horizontal)
2: Aligned System
When we have lots of space, where are arrowheads placed?
Inside the Extension Lines
When there’s limited space, where do we put the arrowheads?
Outside the Extension Lines
When there is no space at all, where do we put the arrowheads and numbers?
Outside the Extension Lines (Including Numbers)
When there no space at all and is crowded with Dimension Lines , what do we do with the numbers and arrowheads?
Replace Arrows with small circular dot.
Do we repeat Dimensions on mulitple views?
No
Do we avoid dimensioning hidden lines?
Yes
For the Metric System, which unit do we use?
mm
For the Imperial System, which unit do we use?
For Mechincal Drawings: common fractions
For Architectial Drawings:Feet and Inches and fractions for part of a inch.
Do we use the inch sign?
No
ø
diameter symbol
R
radius symbol
°
Degree Symbol
∠
Angle Symbol
℄
Center Line Symbol
