Print Reading

Types of Drawings Working- drawing used to produce objects Assembly- shows object fully assembled Detail- shows each part of assembly

Working Drawing

Assembly Drawing

Detail Drawing

Orthographic projection a method of projection in which an object is depicted using lines & planes

Views Direction from which an object is seen

Types of views Front view-most of the overall shape Right side view- to the right of the front view Left side view- to the left of the front view Top view- view from above the front view Bottom view- view below the front view Back view- view directly opposite of the front view

Using a working drawing- Points Each point on the object is given a lower-case letter or number Start on the left hand side, closest to the viewer Surface is defined by all of the letters on the corners of the surface Separate with a COMMA

Using a working drawing Lines are separated with a dash (-)

Types of Lines Object lines- outline of the object that can be seen in that view

Hidden Lines Cannot be seen in the view due to material in front of them. Dashed lines Thinner than object lines

Centerlines Center of a radius, circle, cylinder Runs through exact center of a hole Short and long dashes

Dimension Lines Placed ½” away from outer edge of object. Skinny, with arrowhead

Extension Lines End points of dimensioned lines are marked lines= extension lines Thin solid lines

Section Lines Used when an inside feature needs to be shown Hypothetically cuts an object in half Shows direction of the cut Thickest line. Long short short long

Leader Lines Size of a corner radius or hole is given using a leader line Leads to a clear area on drawing