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Number of Turns: 45 (#3545); 55 (#3555) Design: Stand-up Brushed Input Voltage: 2S Li-Po cells or 4-7 cells (1.2V/cell) Motor Size: 2.07" x 1.42" (52.7 x 36.1 mm) Shaft Diameter: 0.125" (3.2 mm) [accepts all existing pinion gears] Bearing: Novak #5937 Steel Ball Bearings ABEC-3 (1/8"I.D. x 3/8"O.D. x 5/32"W) Motor Weight: 5.97 oz., 169 grams (#3545); 6.03 oz., 171 grams (#3555) Magnet: High-Strengh Ferrite RPM: 8,000 @ 7V or Kv of 1140 RPM/Volt (#3555) Power Output: 22 Watts @ 4,500 RPM (#3555) Efficiency Peak: 67% @ 6,300 RPM torque 588gm/cm (#3555)
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