Welcome to Basic Drafting Todays Plan Drafting Tools

Welcome to Basic Drafting

Today’s Plan • • • Drafting Tools Line Identification Free Hand Sketching Circles Letters & Numbers

Drafting Tools • • • Drafting Board Pencil – Mechanical preferably T-Square 60° or 45° Triangle Eraser Brush

Line Identification Thick Line Used to draw the main body of a part Thin Line Used to draw cross hatching Hidden Line Used to draw lines that cannot be seen in the current view

Line Identification Centre Line Used to identify the CENTRE of a shape Dimension Line 2 -1/2” Used to determine the size of a part Cutting Plane Used to identify a cross-section cut away

Line Identification Long-Break Line Used to represent a line is longer than shown Phantom Line Used to show alternate positions that a part can move to

Free Hand Sketching • Some Key Points to remember when free hand sketching: • Do not hold the pencil too tight • Do not PUSH the pencil – “trail” it along • Try and maintain even pressure

Free Hand Sketching • Some Key Points to remember when free hand sketching: • Turn page to accommodate your natural range of motion • Look just ahead of the pencil in the direction of where you want the line to go

Exercises

Sketching Circles • When sketching a circle, start by sketching a square

Sketching Circles • Then divide the square up into QUARTERS

Sketching Circles • Then draw your circle one quarter at a time

Exercises

Letters & Numbers • Letters & Numbers on a drawing have to be NEET and LEDGIBLE! • ALWAYS in CAPS – rarely in lower case. • Good lettering & numbering takes PRACTICE

Exercises