INTRODUCTION OF FASTENERS i)- All big or small machines are made by joining different parts. ii)- There are so many methods to assemble the machines parts with each other these are called fasteners. iii)- The process by which these are assembled is called fastening. iv)- There are three main methods of fastening: (a) Temporary fastening , (b) Semi-permanent fastening , (c) Permanent fastening (a) Temporary Fastening : i)- This is a type of fastening by which different parts of machine can be opened or re-assembled without any damage. ii)- In this neither job nor fastener is damaged like nut and bolt, key, screw and pin etc. (b) Semi-permanent Fastening: i)- In this method there is no risk of damage to job but fastener is damaged. ii)- This system is used where there is a chance of opening of the parts due to some reason, For example soldering and riveting etc is Semi-permanent Fastener. (c) Permanent Fastening: i)-...
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