19. Flat Belt Pulleys .715726
1. Introduction. 2. Types of Pulleys for Flat Belts.
3. Cast Iron Pulleys. 4. Steel Pulleys. 5. Wooden
Pulleys. 6. Paper Pulleys. 7. Fast and Loose Pulleys.
8. Design of Cast Iron Pulleys.
20. V-Belt and Rope Drives .727758
14. Design of Cylinder Covers. 15. Boiler Stays.
16. Bolts of Uniform Strength. 17. Design of a Nut.(xi)
18. Bolted Joints under Eccentric Loading. 19. Eccentric
Load Acting Parallel to the Axis of Bolts. 20. Eccentric
Load Acting Perpendicular to the Axi
a Shaft for Bevel Gears.
31. Worm Gears .11011124
1. Introduction 2. Types of Worms 3. Types of Worm
Gears. 4. Terms used in Worm Gearing. 5. Proportions
for Worms. 6. Proportions for Worm Gears.
7. Efficiency of Worm Gearing. 8. Strength of Worm
only a few articles are to be made, extra expenses are not justified unless the
machine is large or of
some special design. An order calling for small number of the product will not
permit any undue
Design considerations play important role in the success
1. Definition. 2. Classifications of Machine Design.
3. General Considerations in Machine Design.
4. General Procedure in Machine Design.
5. Fundamental Units. 6. Derived Units. 7. System of
Units. 8. S.I Units (International System of Units).
9. Metre. 1
product may differ quite markedly from the original product.
3. New design. This type of design needs lot of research, technical ability and
creative thinking. Only those designers who have personal qualities of a
sufficiently high order can take up the
Strain Energy Theory (Haighs Theory). 14. Maximum
Distortion Energy Theory (Hencky and Von Mises
Theory). 15. Eccentric LoadingDirect and Bending
Stresses Combined. 16. Shear Stresses in Beams.(ix)
6. Variable Stresses in Machine Parts .181223
is within the zone of a worker is considered an accident hazard and may be the
cause of an injury. It
is, therefore, necessary that a designer should always provide safety devices for the
safety of the
operator. The safety appliances should in no way inte
Concentration due to Holes and Notches. 13. Methods
of Reducing Stress Concentration. 14. Factors to be
Considered while Designing Machine Parts to Avoid
Fatigue Failure. 15. Stress Concentration Factor for
Various Machine Members. 16. Fatigue Stress
16. Designation of Wire Ropes. 17. Properties of Wire
Ropes. 18. Diameter of Wire and Area of Wire
Rope.19. Factor of Safety for Wire Ropes.20. Wire Rope
Sheaves and Drums. 21. Wire Rope Fasteners.
22. Stresses in Wire Ropes. 23. Procedure for Designing
1.7 System of Units
There are only four systems of units, which are commonly used and universally
These are known as :
1. C.G.S. units, 2. F.P.S. units, 3. M.K.S. units, and 4. S.I. units.
Since the present course of studies are conducted in S
Flanged Pipe Joint. 9. Design of Square Flanged Pipe
9. Riveted Joints .281340
1. Introduction. 2. Methods of Riveting. 3. Material of
Rivets. 4. Essential Qualities of a Rivet. 5. Manufacture
of Rivets. 6. Types of Rivet Heads. 7. Types of Rive
and recommending the book to their students and friends.
We hope, that they will continue to patronise this book in the
Our grateful thanks are due to the Editorial staff of
S. Chand & Company Ltd., especially to Mr. E.J. Jawahardatham
The subject Machine Design is the creation of new
and better machines and improving the existing ones. A
new or better machine is one which is more economical in
the overall cost of production and operation. The process
of design is a long
Preface to the
W e feel satisfied in presenting the new edition of this popular treatise. The
favourable and warm reception which the previous editions and reprints
of this book have enjoyed all over India and abroad, is a
matter of gre
2. Motion of the parts or kinematics of the machine. The successful operation of
any machine depends largely upon the simplest arrangement of the parts which will
give the motion required.
The motion of the parts may be :
(a) Rectilinear motion which incl
4. Form and size of the parts. The form and size are based on judgement. The
smallest practicable cross-section may be used, but it may be checked that the
stresses induced in the designed
cross-section are reasonably safe. In order to design any machine
Pressure. 4. Circumferential or Hoop Stress.
5. Longitudinal Stress. 6. Change in Dimensions of a
Thin Cylindrical Shell due to an Internal Pressure.
7. Thin Spherical Shells Subjected to an Internal
Pressure. 8. Change in Dimensions of a Thin Spherical
We take an opportunity to present this standard treatise entitled as to the students of
Degree, Diploma and A.M.I.E. A TEXTBOOK OF MACHINE DESIGN
(India) classes in M.K.S. and S.I. units. The objective of this
book is to present the subject matter in a mo
constraints. It may be achieved by minimising the undesirable effects.
(e) System design. It is the design of any complex mechanical system like a motor
(f) Element design. It is the design of any element of the mechanical system like
to be Dissipated during Braking. 4. Materials for Brake
Lining. 5. Types of Brakes. 6. Single Block or Shoe
Brake. 7. Pivoted Block or Shoe Brake. 8. Double Block
or Shoe Brake. 9. Simple Band Brake. 10. Differential
Band Brake. 11. Band and Block Brake.
Materials, Theory of Machines, Workshop Processes and
Engineering Drawing.2 A Textbook of Machine Design
1.2 Classifications of Machine Design
The machine design may be classified as follows :
1. Adaptive design. In most cases, the designers work is conce
1. Introduction. 2. Types of Springs. 3. Material for
Helical Springs. 4. Standard Size of Spring Wire.
5. Terms used in Compression Springs. 6. End
Connections for Compression Helical Springs. 7. End
Connections for Tension Helical Springs. 8. Stresses
of Safety for Chain Drives. 13. Permissible Speed of
Smaller Sprocket. 14. Power Transmitted by Chains.
15. Number of Teeth on the Smaller or Driving Sprocket
or Pinion. 16. Maximum Speed for Chains.
17. Principal Dimensions of Tooth Profile. 18. Design
Car assembly line.Introduction 5
Note : When there are number of components in the market having the same
qualities of efficiency, durability
and cost, then the customer will naturally attract towards the most appealing
product. The aesthetic and