Sunnysky X3520-8 Motor — Brushless Motor for Drones by Sunnysky

Brand: Sunnysky. Product Type: Drones and Quadcopters > Motors. This X-series motor is designed for compact and heavy-lift multicopters and is positioned as a reliable solution for amateur and professional applications.

Design Features and Materials: X-series motors are CNC-machined and feature a hollow design, which provides improved cooling and reduced weight, while giving the product visual strength. The shaft is made of 420 stainless steel imported from Japan, heat-treated to increase strength, ductility, and resistance to bending and tearing. The top and bottom covers are made of 6061-T6 aviation aluminum alloy for high hardness and tensile strength. Imported miniature NMB (Japan) bearings are used to ensure long-lasting and quiet operation. The coils are hand-wound, resulting in a dense, neat winding with a better fill factor and increased continuous power.

Sunnysky X3520 KV520 Brushless Motor — Specifications

• Stator Diameter: 35 mm
• Stator Thickness: 20 mm
• Number of Stator Slots: 12
• Number of Rotor Poles: 14
• No-Load Current: 1.1 A / 10 V
• Motor Resistance: 23 mOhm
• Maximum Continuous Current (Peak): 80 A / 30 s
• Maximum Continuous Power: 2000 W
• Rotor Diameter: 42.5 mm
• Case Length: 45 mm
• Max LiPo Cell: 6S
• Recommended ESC: 60-80 A

Sunnysky X3520 KV720 — Technical Parameters

• Stator Diameter: 35 mm
• Rotor Diameter: 42.5 mm
• Stator Thickness: 20 mm
• Shaft Diameter: 5 mm
• Number of Stator Slots: 12
• Case Length (without shaft): 45 mm
• Overall Length: 64 mm
• Number of Rotor Poles: 14
• Motor Kv: 720
• Maximum Number of LiPo Cells: 4-5S
• No-Load Current: 1.4 A / 10 V
• Recommended ESC: 80-100 A
• Motor Resistance: 19 mOhm
• Recommended Propellers (inches): APC 12x6, APC 12x8, APC 13x6.5, APC 13x8, DXL14

Sunnysky X3520 KV880 Brushless Motor — Technical Specifications

• Stator Diameter: 35 mm
• Stator Thickness: 20 mm
• Number of Stator Slots: 12
• Number of Rotor Poles: 14
• No-Load Current: 2.0 A / 10 V
• Motor Resistance: 15 mOhm
• Maximum Continuous Current: 83.8 A / 30 s
• Maximum Continuous Power: 1360 W
• Rotor Diameter: 42.5 mm
• Shaft Diameter: 5 mm
• Case Length (without shaft): 45 mm

These Sunnysky X3520 motors are suitable for various multicopter designs: from heavy-lift 6S applications to higher RPMs on 4-5S configurations, depending on the specific KV. High-quality materials, Japanese NMB bearings, and hand-wound coils guarantee long-lasting and stable operation under high loads. If you need high power, reliability, and efficient cooling — the X3520 line from Sunnysky is worth considering.

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