Hole Issues: Length-to-Diameter Ratio

The following cost model variables specify the L/D ratio thresholds for various types of holes: 

  • Small, blind holes: smallBlindHoleDepthToDiaRatio (2 in starting point Digital Factories)

  • Large, blind holes: largeBlindHoleDepthToDiaRatio (3 in starting point Digital Factories)

  • Small, through holes: smallThroughHoleDepthToDiaRatio (4 in starting point Digital Factories)

  • Large, through holes: largeThroughHoleDepthToDiaRatio (6 in starting point Digital Factories)

The property isBlind is true for blind holes and false for through holes.

A hole is considered small if its diameter is less than the cost model variable smallHoleDiamBorder (4.7625mm in starting point Digital Factories). It is considered large otherwise.