Drawing Instruments• Drawing board

Drawing sheetMini-drafter/drafting machineInstrument box containing compass, divider, etc.ProtractorFrench curvesDrawing pencilsEraserDrawing clip/pin/adhesive tapeSharpener

• Manual & Drawing Kit from Balaji Store – VIT University.

Drawing board & Mini-drafter/drafting machine

Drawing sheet• Metric

ISO “A” Series

- Regular

- Oversize

ISO “B” Series

• Non Metric

Mini-drafter/drafting machine

Procedure for clamping the drafter• Set the protractor head with

reference mark indexing zero degree, then fix the clamp of the mini-drafter at the top left corner either along the top horizontal edge of the board or along the left vertical edge of the board.

• With the drawing sheet placed underneath the scales of the minidrafter, fix the drawing sheet to the drawing board with the scales of the mini-drafter aligned either with the vertical or the horizontal borderlines of the drawing sheet.

Procedure for clamping the drafter

Drawing Pencils• Wooden pencils – are graded and designated by

numbers and letters• Mechanical clutch pencils (Micro Tip) – Not allowed• 6B, 5B, 4B, 3B, 2B, B - in decreasing order of

softness and blackness• HB, F, H 2H, 3H – Medium grade• 4H, 5H, 6H, 7H, 8H, 9H – increasing order of

hardness.• Drawings are done using 2H pencils and finished

with H and HB pencils – to be practiced in this course.

• Standard leads are 2 mm in diameter.• Fine line leads are available in .3, .5, .7 and .9 mm

diameters

Eraser, Drawing clip

Scale• Full Scale1 : 1

• Reduced Scale 1 : 100

1 mm of Drawing 100 mm of real

• Enlarged scale 100 : 1

• 1:2, 5, 10, 20, 50, 100, 200, 500, 1000

Layout of Drawing Sheets• Standard form of arrangement, Important

particulars are included

• Facilitate quick reading of important particulars – quick references are located easily – Drawings are prepared at various locations and shared

Title Block• An important feature – a must in every drawing sheet

– for technical and administrative details• Location - Bottom right corner – 170 mm x 65 mm• Divided into two zones

• Identification zone• Registration or identification number• Drawing title• Name of the legal owner of the drawing, i.e., name of the firm or

the company

• Additional information zone• Indicative items –symbol indicating the system of projection,

main scale of drawing, etc.• Technical items – method of indicating surface texture, geometric

tolerances, etc.• Administrative items

Lettering• Writing of titles, sub-titles, dimensions, scale

and other details on a drawing is called lettering.

• It should be clear, legible and uniform• It should be simple, so it can be done

with freehand with speed• Drawing instruments should not be used

Lettering• SINGLE STROKE LETTERS

• The thickness of the line is obtained by single stroke of the pencil

• The lines of the inclined letter are drawn at an inclination of about 75° from horizontal.

• The standard heights for lettering are 2.5, 3.5, 5, 7, 10, 14 and 20 mm.

• The width of the letters is equal to the height in most cases.

• Different for type A and type B lettering.• In lettering ‘A’ Type the height of the capital letter is directed into

14 parts.

Lettering

Lettering (Type-A)

Lettering (Type-A)

Note:The width of letters are selected suitably and are varying from 0.4h to 0.6h expect for letters M,W and I

The ratio of height to width for most of the CAPITAL letters is taken as nearly 14:10 and in case of M and W the ratio can be taken approximately as 14:12.For I the ratio as 14:6

Lettering (Type-A)