Machine Drawing - 15206
 Periods/Week   Periods in one
6 0 0 120 100 80 20




For a technician to work efficiently he must have a very sound knowledge of drawing. The main objective of framing syllabus of Machine Drawing is to make the technician well trained in drawing, so that he may be able to work in different fields such as in industry, department of sales or services or in the department of drawing and design etc.


By going through the contents student will be able to:

  • Understand drawing and develop capacity to represent any matter/object with the help of picture.

  • Develop primary knowledge of working drawing.

  • Produce orthographic drawing of different machine parts.

  • Develop skill to produce assembly drawings.

  • Develop skill to produce detailed drawings of machines parts from assembly drawing.

SL Topics Sheets Periods
1. Introduction 01 10
2. Free Hand Sketching of Machines Parts 02 28
3. Riveting 01 07
4. Nuts and Bolts 01 06
5. Conversion of Isometric Views into Orthographic Projection 02 18
6. Sectional Views 01 07
7. Assembling of different Machine Parts from disassembled views 02 25
8. Disassembling of Machine Parts from assembled views 02 20
  Total 12 120


 Topics  Content Periods
01 Introduction - 1 Sheet 10
01.01 Representation of different types of lines.   
01.02 Representation of different materials, like - ferrous, non ferrous, atone, bricks, wood.  
01.03 Limits and Fits:
  • Selection of margin
  • Concept of g & H
  • Go and Not go gauge
  • Difference between theoretical drawing and actual drawing (Conversion of drawing into job and job into drawing).
02 Free Hand Sketching of Machine Parts - 2 Sheet 28
02.01 Rules of free hand sketches and its use.  
02.02 Concept of Sectioning: Full Sectioning, Half Sectioning, Part Sectioning.  
02.03 Sketching of different machine parts, i.e. knuckle joint, cotter joint, coupling (flange, flexible, universal), Bearing (all types, i.e., journal, bush, pedestal, foot step etc.), Plumber block, Fast and loose pulley. (At least 4 machine parts should be shown in each sheet) - (Not to the scale).  
03 Riveting - 1 Sheet 07
03.01 Introduction of shapes of rivet heads. Caulking and Fullering pitch, Diagonal pitch, Margin, Back pitch, etc. Types of riveting (lap and butt joint, zigzag and chain structure, Boiler joint.  
04 Nuts and Bolts - 1 Sheet 06
04.01 Classification of nuts, terminology used in the drawing of nuts and bolts. Drawing of orthographic projections (top view, front view and side view) of a bolt, Imperical relations of dimensions of nut and bolt with respect to bolt head diameter.  
05 Conversion of Isometric Views into Orthographic Projection - 2 Sheets 18
05.01 Conversion of Isometric Views into Orthographic Projection.  
06 Sectional Views - 1 Sheets 07
06.01 Orthographic Sectional View of Piston of 2 stroke and 4 stroke Internal combustion Engine.  
07 Assembling of different Machine Parts from disassembled views - 2 Sheets 25
07.01 Expansion joint, cross head of steam engine, steam stop valve big end of connecting rod.  
08 Disassembling of Machine Parts from assembled views - 2 Sheets 20
08.01 Knuckle joint, coupling, (any one coupling) bearing (any one bearing), Internal Combustion Engine parts.  
Note: At least 10 sheets should be done in Sessional.


 Recommended Books
SL Title/Publisher Author
1. Machine Drawing N.D. Bhatt
2. Machine Drawing P.S. Gill
3. Machine Drawing Mittal and Agrawal
4. Machine Drawing Nagpal


 Scheme of Examination: Final Examination Marks = 80
Designed and Developed by NIC, Bihar State Centre, Patna.