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MACHINE FINISHES TO METALS
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THE LATHE - TYPICAL MACHINE FINISH

Lathe tools produce a machined finish. They can be shaped to produce a range of different machined finishes - two are shown below. A machined finish can be attractive and also have a practical function, such as a grip.




  THE MILLING MACHINE - TYPICAL FINISHES

Milling machines can be used in conjunction with a variety of cutting tools. Often the tools produce a very accurate, distinctive and fine circular pattern.


 
 
 

THE SURFACE GRINDER - FINISHES

A surface grinding machine is used to accurately produce a flat surface, after some machining has already taken place (for example, through the use of a vertical miller). A surface grinder is used where absolute precision is required.
As the grinding wheel revolves at high speed, it produces a smooth, flat surface, giving a distinct finish (samples shown below). If real precision is required, a surface grinder is used.



 
 
 
 
QUESTIONS
 
1. Describe two reasons for a machined finish being applied to metals? 4 marks
 
 
 
 
 
 
 
2. What type of work is carried out by a surface grinder? 4 marks
 
 
 
 
 
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