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HOW TO USE A KNURLING TOOL

V. Ryan © 2003 - 2009

 

   

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A knurling tool is used to press a pattern onto a round section. The pattern is normally used as a grip for a handle. Apprentice engineers often manufacture screwdrivers. These have patterned handles, to provide a grip and this achieved through the technique called knurling. The pattern produced is called a ‘knurled pattern’.

 

 

 

 

   

This diagram shows the knurling tool pressed against a piece of round section steel. The lathe is set so that the chuck revolves at a low speed. The knurling tool is then pressed against the rotating steel and pressure is slowly increased until the tool produces a pattern on the steel.
The automatic control lever is engaged which starts the automatic traverse of the saddle. As the saddle moves along the bed of the lathe the knurled pattern is pressed into the steel along its length.
If the traverse of the lathe is stopped and then reversed a diamond pattern is produced.

Depending on the knurling tool selected, a variety of knurled patterns can be produced. Three typical patterns are seen opposite

   
 
   

QUESTIONS:
1. Draw a piece of equipment or a tool that has a knurled pattern. Explain why a knurled pattern is needed.
2. Using notes and diagrams, explain how the process of knurling is carried out.

   

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