Standard Engineering Lettering
Lettering in Engineering Drawing
Lettering is used to provide easy to read and understand
information to supplement a drawing in the form of notes
and annotations.
Thus, it must be written with:
Legibility – shape & space between letters and words.
Uniformity – size & line thickness.
Lettering is an essential element in both traditional drawing
and Computer Aided Design (CAD) drawing
Types of Lettering
The two types of lettering are:1.Vertical Lettering2.Inclined Lettering
vertical letters inclined letters
Conventions for Lettering
• Use all CAPITAL LETTERS.
• Use even pressure to draw precise, clean lines.
• Use one stroke per line.
• Use kerning to eliminate excessive space between letters. –
[kerning refers to adjusting the space between characters, especially by
placing two characters closer together than normal. Kerning makes certain
combinations of letters, such as WA, MW, TA, and VA, look better.]
Conventions for Lettering (cont.)
• Always Skip A Space Between Rows Of Letters.
• Always Use Very Light Guide Lines.
• Fractions Are Lettered Twice The Height Of Normal Letters.
• Fraction Bars Are Always Drawn Horizontal.
Application of Lettering
Lettering in Engineering Drawings is used in writing
Title Blocks which play a crucial role in drawings, they
are used to record all of the important information
necessary for the working drawings.
What does the Title Block contain?
Other uses of lettering include Dimensions and Notes
on the engineering drawing.
Placement of text on Engineering Drawings
GuidelinesExtremely light horizontal lines that are necessary to regulate the height of letters.
In addition, light vertical or inclined guidelines are used to keep the letters uniformly vertical or inclined.
Guidelines are absolutely essential for good lettering.
• After lettering has been completed, the guidelines are not erased.
Spacing
Should be UNIFORM•.
LINES AND LETTERINGS
L I N E S
T T E R SEL
Examples of Common Mistakes in Lettering
L E t T E r I N G
L E T T E R I N G
L E T T E R I N G
LET T E R ING
L E T T E R I N G
Lettering style not uniform
Lettering height not uniform
Lettering inclination not uniform
Lettering thickness not uniform
Lettering space not uniform
ReferencesFrench, T. E., (1918). A MANUAL OF ENGINEERING DRAWING FOR STUDENTS AND DRAFTSMEN. London: Hill Publishing Co., Ltd.
Engineering Drawing Fundamentals: Introduction to Engineering Drawing. Retrieved from http://pioneer.netserv.chula.ac.th/~kjirapon/lecture-note.html.
Madsen D. A., Madsen D. P., (2011). ENGINEERING DRAWING & DESIGN, Fifth Edition. New York: Cengage Learning.
Reddy K. V., (2008). TEXTBOOK OF ENGINEERING DRAWING. Hyderabad: BS Publications.
THE END
Top Related