A rotor capable of dissipating heat comprises a hub and a shielding received in the hub. The shielding case has an upper wall with a plurality of projection parts. The projection parts have a side thereof attached to the upper wall respectively and a plurality of openings are disposed in the upper wall at the projection parts. The hub has an upper hub wall with a plurality of through holes. The fluid can move in and out via the openings and the trough holes to perform heat dissipation.

 
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