Factors to be considered during Machine Design or Mechanical Design

Factors to be considered while Designing Machine

8) Ease of assembly: The elements of the machine should be such that the machine can be assembled very easily. For the mass production of the complex machines like automobiles, type writers etc, the concept of unit assemblies are common. The unit assemblies are assembled together to form the complete machine.

9) Ease and simplicity of disassembly: Like assembly, the disassembly of the machine also should be easy so as to easily carry out replacement of the parts, and repair and maintenance of the machine and machine elements.

10) Ease and simplicity of servicing and control: The machine and its element should be simple enough so that very little maintenance and servicing is required. The repair and maintenance of the machine should be easy and cheap and simple replacements should be available.

11) Light weight and minimum dimensions: The machine elements and machine should be strong, rigid and wear resistant with minimum weight and least dimensions. This can be achieved by using light weight rolled sections and hardening the metals. Using high strength grades of cast iron and light alloys can further help getting light materials and minimum dimensions of the machine elements. Improving the design in this direction is very important.

12) Reliability: The reliability of the machine is a very important if the machine has to find the huge market in the business.

13) Durability: The longer the life of the machine more it develops the reputation of being the dependable machine and more will be its sale. Hence the right at the time of designing reliability and durability should be given priority. For this the machine should be designed for least maintenance requirements and long-life.

14) Economy of performance: For the proper economic performance of the machine correct mechanical, hydraulic, thermodynamic and other principles should be applied while designing the elements of the machine and the whole machine.

15) Accessibility: The machine elements and machine the whole should be easy to handle and access.

16) Processability: The shape and the materials for the elements of the machine should be such that they can the processing costs and labor costs are lowest possible.

17) Compliance with state standards: Following the standards makes designing easier and availability of various parts faster and easier.

18) Economy of repairs and maintenance: While designing the machine elements and machine the designing should be such that least amount of repairs and maintenance will be required for the machine.

19) Use of standard parts: There should be maximum possible standard parts in the design of the machine. This will help reduce the cost of the machine and ensure easy availability of the parts. With standard parts the design can be modified easily.

20) Use of easily available materials: Materials selected for the machine elements during the design should be available easily and lowest possible costs.

21) Appearance of the machine: While designing the machine the aesthetics and ergonomics of the machine should be given due consideration without affecting its functionality.

22) Number of machines to be built: Designing of the machine will depend a lot on the number of machines to be manufactured. If few numbers of machines are to be manufactured then expensive materials and high production costs can be considered, but for the mass production economy of the machine should be top priority.


Book: Machine Design by Dr. P. C. Sharma and D. K. Aggarwal

This post is part of the series: Machine Design or Mechanical Design

This is the series of articles on Machine Design or Mechanical Design. Machine design and drawing are very important subjects of mechanical engineering. No produce can be manufactured without designing it. Here some basic concepts of machine design or mechanical design have been covered.
  1. What is Engineering Design?
  2. What is Mechanical Design or Machine Design?
  3. What is a Machine?
  4. What are Machine Elements?
  5. Factors to be considered during Machine Design: Part-1
  6. Factors to be considered during Machine Design: Part-2
  7. Machine Design Procedure
  8. Skills a Good Machine Designer should possess