Kilmer: Drafting
DRAWING EVALUATION SHEET
Basically you should ask yourself two questions:
1. Is the drawing accurate?
2. Did you follow instructions and drafting rules?
3. Does the drawing look good?
This is all I concern myself with when I grade your drawings.
Remember also the following three important words when you draw:
NEATNESS ACCURACY, COMPLETENESS (NAC)
TEN DRAFTING RULES
1. The drawing must be neat and clean.
2. The views, title block, etc... must be balanced and centered.
3. There must be a definite contrast of lines.
4. Corners must meet exactly.
5. All lines must be clear-cut, sharp, and of constant weight.
6. The drawing must be properly dimensioned.
7. Straight lines and curved lines must be tangent at the proper
place and flow into each other.
8. Observe the proper alphabet of lines.
9. Make arrowheads properly.
10.
Use guidelines and never mix the TYPES of lettering.
MORE SPECIFIC RULES
I. Neatness: A clean, neat, drawing is important first impression.
1. Clean up drawing before turning in.
2. No smudges, stray lines, bent corners, creases, etc.
II. View Location: Generally, views should be centered, not too close
to borderlines or bunched in the center. Spacing must be pleasing
Kilmer: Drafting
to the eye. Dimensions should not detract from the objects shown.
Dimensions should be easily found. Notes well spaced and legible.
See separate sheet(s) on view locations: Pictorial Spacing, Multiview Spacing. Keep in mind that there may be exceptions to this
spacing rule. The formula is used often but after you become
experienced you may do a lot of estimating and guessing. See
separate sheet for spacing and pictorial views.
III. Line weight: Proper line weight greatly enhances the beauty of a
drawing. See separate Alphabet of Lines sheet for details.
Concentrate on making all lines dark regardless of width. However,
construction, projection and guidelines must be light and arrow.
Line weight has varying degrees of importance depending on job or
assignment. I will identify drawings that do not require you to
rigidly adhere to proper line weight.
IV. Lettering/Numbering: A draw cannot have a professional appearance
without good letters and numbers! You most practice diligently.
1. Vertical capitals until proficient.
2. Use guidelines.
3. Make all strokes dark and consistent.
4. Numbers must not touch fraction bars.
5. Arrowheads should be correctly shaped, proportioned and sized
(1/8 to 3/16 Long) L=3xW.
6. Letters/numbers should be correctly shaped, stroked, spaced and
sized.
7. Good lettering requires knowledge of letterform.
8. Practice.
V. Dimensioning: To insure accuracy and efficiency in use, dimensions
are arranged on a drawing in a definite manner. Accurate
dimensions are more important than accurate drawing.
1. Dimension and extension lines should be correctly located and
spaced.
2. Use numbers, notes and symbols appropriately.
3. Draw first dimension line 3/8” from object, additional
dimension 1/4” apart. (These may vary)
4. Draw extension line 1/8” from object and 1/8” past dimension
line.
Kilmer: Drafting
5. Stagger rather than stack dimensions.
6. Dimension between views on multi-view drawings when practical.
7. Do not over-dimension.
8. Place dimension 1/16” above dimension line.
9. Enclose lesser dimensions with greater dimensions.
10. Avoid dimensioning to hidden lines.
11. Avoid crossing dimension lines and extension lines.
12. Never allow any line to pass through a dimension figure.