Spark Plug

Scanned image

  • Spark plug, about 15mm long with a 12ga bar and 6mm ball .
  • This was designed as a barbell nut for body piercing.
  • Unfortunenatly deemed not to have enough of a market to justify production.
    It never the less would make a fine custom piece... maybe a multi-colour gold version?
      
spark plug scan
   

Modeling notes

  • A rather convoluted technique to build a model for milling with a rotary axis replacing a linear Y
  • Fore ground rendering shows the original model
  • In the back is render of model used to generate toolpaths The hex nut and electrode were unrolled from the round version and the threads and insulator reconstructed using the original curves with the new surfaces being angled and skewed to the proper orientations
  • A supporting structure was also added at the electrode end.
  • The piece was then milled, only minor thouch up work on the seam and undercuts at the tip left as hand work.
      
plug renders
   





Gallery Next

Copyright © Jeff Demand 2003