1. Segments
2. Mica
3. Incorrect (Mica must not be left with a thin edge next to segments)
4. Correct (Mica must be cut away clean between segments)
5. Starting groove in mica with 3 cornered file
6. Undercutting mica with piece of hacksaw blade
7. Commutator
Figure 5-2. Undercutting Mica Separators
5-4 2008 Dyna Service: Starter