003.03 Demonstrate correct drawing procedures Basic Drafting Skills 003.03 Demonstrate correct drawing procedures

Aligning & Taping Paper Align paper on parallel edge (or T-square) Fasten top two corners with strips of drafting tape Lower parallel edge (or T-square) and fasten bottom two corners with strips of drafting tape

Drawing Lines Use parallel edge (or T-square) to draw horizontal lines Lean pencil at about 60° Use triangles to draw vertical and inclined lines

Drawing Lines at Standard Angles 90° VERTICAL 75° 75° 60° 60° 45° 45° 30° 30° 15° 15° HORIZONTAL 0°

Drawing Parallel Lines Move parallel edge (or T-square) and triangle to line up with given line AB With parallel edge (or T-square) held firmly in place, slide triangle into position and draw required line A B REQ’D LINE

Drawing Perpendicular Lines Move parallel edge (or T-square) and triangle until a side of the triangle lines up with the given line AB With parallel edge (or T-square) held firmly in place, reposition triangle across line and draw required line A B REQ’D LINE

Drawing the Border Recommended layout for A size sheet 11.00 10.25 .50 TITLE BLOCK AREA .38 .50 7.63 8.50 10.25 11.00 Recommended layout for A size sheet

Drawing the Title Block Title block contains information such as drafter, date, and scale Dimensions shown are recommended and may be varied to accommodate the user’s requirements INFORMATION RELATED TO PREPARATION OF DRAWING INCLUDES NAME OF DRAFTER, ENGINEER, CHECKER, ISSUE DATE, ETC. COMPANY NAME AND ADDRESS TITLE SIZE CAGE CODE DWG NO. REV SCALE SHEET 1.75 3.25 4.25 6.25 .38 2.38 3.88 .25 .63 1.38 2.00

Centering a Single View Drawing 5.50 1.50 3.00 8.75 1.75

Centering a Single View Drawing Step 1 4.38 2.75

Centering a Single View Drawing Step 2 1.50 3.00 1.75

Centering a Single View Drawing Step 3

Centering a Single View Drawing Step 4

Scale Drawings Measurements can be full size or in some exact proportion to full size Triangular scales are typically used to allow for more scales per stick Scales are noted on drawings as Drawn units = actual units Drawn units : actual units

Reading a Mechanical Scale 1 16 1 8 1 4 2 3 16 1 2 1 16 1 2 FRACTIONAL INCH SCALE (FULL SIZE)

Reading a Mechanical Scale 3 8 7 2 1 1 4 1 44 42 2 40 3 FRACTIONAL INCH SCALE (HALF SIZE)

Reading a Decimal Scale 1.50 1.12 .74 50 (.02) 2 4 6 8 1 DECIMAL INCH SCALE (FULL SIZE)

Reading a Decimal Scale .50 1.70 3.20 5.90 HALF SIZE 1 2 3 4 5 6 7 8 DECIMAL INCH SCALE (HALF SIZE)

Reading a Metric Scale 1:1 SCALE (1mm DIVISIONS) 6 66 24 42 mm 10 20 10 20 30 40 50 60 70 80 1:1 SCALE (1mm DIVISIONS)

HALF SCALE (2mm DIVISIONS) Reading a Metric Scale 2 110 62 28 mm 1:2 20 40 60 80 100 120 140 160 HALF SCALE (2mm DIVISIONS)

Measuring Angles w/ a Protractor Angles are measured in units called degrees A circle is divided into 360 parts (360°) Each part is 1° An angle of 43° is measured with a protractor 43°

Alphabet of Lines Construction lines Visible lines Thin and light .020” (0.5mm) Hard lead (4H) Visible lines Thick and dark .028” (0.7mm) Softer lead (F or HB)

Alphabet of Lines Hidden lines Thin and dark .020” (0.5mm) Softer lead (F or HB) .125” (3mm) long dashes w/ .030” (1mm) spaces in between .125" .0625"

Alphabet of Lines Center Lines Thin and dark .020” (3mm) Softer lead (F or HB) .125” (0.5mm) dash in center w/ .030” (0.1mm) spaces between longer lines .125" .75" - 1.5" .0625"

Alphabet of Lines Dimension, Extension, Leader Lines Thin and dark .020” (0.5mm) Softer lead (F or HB) 6.125”

Alphabet of Lines Thickness Thick (.028”/.07mm) Thin (.020”/.05mm) Darkness Dark (F or HB) Visible Lines Hidden Lines Center Lines Dimension Lines Extension Lines Leader Lines Light Construction Lines Guidelines