Hitachi G 18SS Service Manual page 5

180/230 mm
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Dust-proof ball bearing thanks to the labyrinth construction
The ball bearing retainers at both sides of the armature have a labyrinth construction to make the ball
bearings dust-proof.
Labyrinth
Commutator
Ball bearing (6301VVCM)
Ball bearing (6000VVCM)
Labyrinth
Armature shaft
Housing
Dust seal
Fan
Bearing cover
-2-

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