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Brush-less DC Motor
Design Specifications:

Continuous output: 1/4HP-1HP (200W-750W)
Rpm: 400-10,000
Input voltage : 12vdc-380vdc
Max. diameter: 5" (125mm)
(excluding fins )
Max. length: 4" (100mm)
(excluding shaft )
Weight: 5lbs-10lbs (2.5kg-5kg)

Manufactured Motor/Controller Example