Enigma Rotor Details - Physical Design of Rotors

Physical Design of Rotors


Exploded view of an Enigma rotor Three rotors in sequence
  1. notched ring
  2. marking dot for "A" contact
  3. alphabet tyre
  4. plate contacts
  5. wire connections
  6. pin contacts
  7. spring-loaded ring adjusting lever
  8. hub
  9. finger wheel
  10. ratchet wheel


  • The right side of a rotor, showing the pin electrical contacts. The Roman numeral V identifies the wiring of the rotor.

  • The left side of an Enigma rotor, showing the flat electrical contacts. A single turnover notch is visible on the left edge of the rotor.

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