HobbyStar 3520 (4250) Brushless Outrunner Motor

SKU: 377-19-CNF

Availability: In stock


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HobbyStar brushless outrunner motors are built using high-quality components and precision balanced to ensure a smooth, reliable and powerful motor for your aircraft. Motor shafts can be reversed on all motors, and a hardware kit with mounting plate, prop adapter and hardware kit are included with all motors.



  • 14-pole, 12-slot high-torque design
  • CNC machined 6061 T6 billet aluminum housing
  • High-purity copper windings for maximum efficiency
  • High RPM ABEC 5 oversized bearings
  • Precision balanced rotor 
  • Super-thin stator laminations (0.2mm)
  • Flexible silicone leads with pre-installed gold-plated connectors
Model Watts Cells Max Amps Rotor Poles IO Resistance KV (RPM/Volt) Motor Size Stator Size Weight Propeller Shaft Diameter (mm) Connectors
3520-07 1120 3-5S 56A 14 1.8A 0.0298 720 42x50mm 3520 205g 13*8/14*7/12*10 5mm 4.0mm
3520-06 1250 3-5S 62A 14 2.3A 0.0212 800 42x50mm 3520 205g 13*10/14*7/14*10 5mm 4.0mm


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What is the shaft size for the pro adapter on this motor? Thanks
The prop adapter sharft for this motor is 8mm
RCJuice answered on March 11, 2020
Prop needs to be drilled to fit prop shaft. What size drill do I need?
The prop adapter shaft for this motor is 8mm.
RCJuice answered on March 11, 2020