Understanding of Technical Drawing

UNDERSTANDING OF ENGINEERING DRAWINGS

Engineering Drawings

Engineering drawings are industrial language.  Engineering drawings communicate design requirements to machinist, inspector, assembler etc. 

Lines on an Engineering Drawing

Lines on an Engineering Drawing

Lines on an Engineering Drawing

Lines on an Engineering Drawing

Lines on an Engineering Drawing

Lines on an Engineering Drawing

Lines on an Engineering Drawing

Orthographic Projection Views

Orthographic Projection Views

Exercise

Exercise

Tolerances

Tolerances

Tolerances

Allowances & Fits

Allowances & Fits

Allowances & Fits

Threads Terminology

Threads

Threads External Thread Designation M10 X 1 – 5g 6g 6g

Threads Internal Thread Designation M10 X 1 – 5H 6H

Threads Tolerance Grades

Chamfers

Surface Roughness

Ra = Roughness Average Rz = Max height of profile Units = µm

Surface Roughness

Rz

Ra

Some Symbols

Some Symbols