Unit 2

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  • Created by: Nick
  • Created on: 17-05-10 10:55

Usually manufactured from low or medium carbon steel. Adv. of using nuts and bolts is that they can be easily undone, allowing components to be replaced or repaired.

Screwhead terminology

  • Pitch - Distance from each 'ring' around the screw
  • Crown - The highest point of a 'ring'
  • Core diameter - Distance of middle of screw before each 'ring' starts.
  • Outside diameter - Distance from highest to lowest point of whole screw.

Various screw threads:

  • V-thread, Acme thread, Square thread, Buttress thread.

Cutting threads in holes:

The correct term for putting a thread into a hole is 'tapping'. The first consideration when tapping a hole into which the thread is…


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