BOLT 3515 (400KV / 650KV) BLDC Motor

₹7,999.00

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The BOLT 3515 BLDC Motor offers an excellent balance of power density, stability, and performance for multirotor UAVs. Weighing just 152g, it provides efficient thrust delivery and smooth control, making it ideal for professional applications where both flight endurance and responsiveness are equally important.

Available in 400KV and 650KV variants, it supports 4S–6S LiPo batteries, enabling flexible integration into a wide range of drone builds and mission profiles.

KV Options

Clear

The BOLT 3515 motor series is engineered for precision flight applications, offering stable propulsion, efficient torque output, and consistent RPM control. With a maximum thrust of 3.68 kg and power output up to 550 W, it provides ample thrust-to-weight performance for aerial photography, mapping, and industrial operations.

Its 150°C-rated magnets and IP-rated protective design ensure long-term reliability, even during extended missions. Each rotor is dynamically balanced to ≤5 mg, minimizing vibration and enhancing flight stability.

Both 400KV and 650KV variants are optimized to match different drone configurations, the 400KV for long endurance and the 650KV for speed and agility.

Key Features

- Strong Thrust Output: Up to 3.68 kg thrust for stable medium-lift performance.
- Dual KV Options:
  - 400KV: High torque, smooth throttle control, ideal for endurance flights.
  - 650KV: High speed and responsive control for agile flight.
- High Thermal Endurance: 150°C-rated magnets and 180°C varnished copper windings ensure long operational life.
- Precision Rotor Balance: ≤5 mg dynamic balance reduces vibration and improves flight control accuracy.
- Compact Design: 42.5 × 37.5 mm form factor with only 152 g weight for lightweight builds.
- Smooth Electrical Performance: Internal resistance of 93–118 mΩ ensures efficient current flow and low heat generation.
- ESC Compatibility: Works seamlessly with 40A ESCs (2–6S) supporting high-frequency PWM.
- Propeller Versatility: Supports 11–15 inch props depending on KV variant and voltage.

Motor Size	D:42.5 x 37.5 mm
Propeller Mounting Holes	D:12 M3x2, D:15 M3x2
Shaft Diameter	IN: 5 mm
IP rating	35
Varnished wire Degree	150°C
Magnet Degree	150°C
Rotor Balance	≤5 mg
Motor Mounting Holes	D:19 M3x2 D:25 M3x2

No Load Current	0.57 A/ 20V
Motor Weight	152 g
Maximum Current	23.27 A
Maximum thrust	3.11 kg
Nominal Voltage	6S lipo battery
Internal Resistance	88mΩ
Maximum Power	547.9W
Maximum Torque	0.59 Nm

No Load Current	1.28A/20V
Motor Weight	152 g
Maximum Current	38.95 A
Maximum thrust	3.68 kg
Nominal Voltage	6S lipo battery
Internal Resistance	37mΩ
Maximum Power	913.8W
Maximum Torque	0.61 Nm

Propeller & ESC	Throttle [%]	Voltage [V]	Current [A]	Output Power [W]	Torque [Nm]	RPM	Thrust [gf]	Efficiency [g/W]	Operating Temp.
C FIX 14X4.8	30	23.95	0.65	11.3	0.043	2526	205	13.2	60°C
	40	23.92	1.40	26.1	0.076	3348	394	11.8
	50	23.91	2.48	47.7	0.113	4132	610	10.3
	60	23.87	3.71	73.2	0.146	4767	813	9.2
DRV 40A (2-6S)	70	23.86	6.02	121.3	0.21	5562	1172	8.2
	80	23.81	8.67	174.8	0.268	6301	1501	7.3
	90	23.76	11.85	237.1	0.328	6951	1832	6.5
	100	23.69	16.13	320.2	0.401	7665	2273	5.9
C FIX 15X5	30	23.95	0.79	13.4	0.054	2487	271	14.3	76°C
	40	23.92	1.71	31.8	0.094	3251	503	12.3
	50	23.89	3.16	61.4	0.152	4032	781	10.3
	60	23.86	4.85	92.6	0.192	4658	1071	9.3
DRV 40A (2-6S)	70	23.84	7.49	143.8	0.258	5381	1448	8.1
	80	23.76	10.51	201.4	0.318	6061	1798	7.2
	90	23.74	14.31	269.1	0.386	6671	2221	6.5
	100	23.64	19.42	365.2	0.478	7338	2715	5.9
C FIX 16X5.4	30	23.92	0.91	16.4	0.069	2352	328	15.1	80°C
	40	23.9	2.02	40.2	0.1	3092.0	601	12.5
	50	23.9	3.98	79.8	0.2	3931.0	978	10.3
	60	23.8	5.89	115.8	0.2	4504.0	1252	8.9
DRV 40A (2-6S)	70	23.8	8.98	176.1	0.3	5178.0	1676	7.8
	80	23.7	12.77	248.3	0.4	5791.0	2113	7.0
	90	23.67	17.18	332.1	0.499	6348	2567	6.3
	100	23.56	23.27	434.2	0.597	6940	3102	5.7

Propeller & ESC	Throttle [%]	Voltage [V]	Current [A]	Output Power [W]	Torque [Nm]	RPM	Thrust [gf]	Efficiency [g/W]	Operating Temp.
C FIX 13x4.4	30	23.87	1.78	30.8	0.078	3973	438	10.3	92°C
	40	23.79	3.61	70.1	0.131	5108	742	8.6
	50	23.74	7.05	140.3	0.207	6470	1195	7.1
	60	23.68	11.41	224.2	0.281	7619	1667	6.2
DRV 40A (2-6S)	70	23.61	16.52	319.8	0.356	8578	2102	5.4
	80	23.53	22.78	432.5	0.436	9467	2591	4.8
	90	23.43	30.17	559.0	0.519	10274	3067	4.3
	100	23.31	38.95	709.2	0.608	11142	3596	4.0

The BOLT 3515 BLDC Motor is built for professional and enthusiast-grade UAV platforms that require a blend of efficiency, responsiveness, and reliability. Its CNC-machined aviation-grade aluminum housing ensures rigidity and effective cooling, while its optimized stator and rotor design deliver high torque with minimal vibration.

Whether you’re building a cinematography drone, mapping platform, or inspection UAV, the BOLT 3515 provides consistent power and smooth performance under various load conditions.

The 400KV model excels in hover stability and payload efficiency, while the 650KV model prioritizes speed and maneuverability—offering users the flexibility to tune for endurance or agility as needed.

Build & Materials

Each BOLT 3515 motor is manufactured to exacting standards for professional-grade durability and reliability:

CNC-machined aviation aluminum casing for strength and efficient cooling.
150°C Neodymium magnets for strong and stable magnetic flux.
180°C-rated copper windings with high-grade varnish for insulation and heat resistance.
Stainless steel bearings ensure smooth, quiet, and low-resistance operation.
Epoxy-coated stator core provides moisture and corrosion resistance.
Dynamically balanced rotor (≤5 mg) ensures precision rotation and minimal vibration.
IP35-equivalent protection safeguards against dust and light moisture exposure.

Technical Tips for Optimal Performance

Follow these setup recommendations for best results:

Use 40A ESCs with ≥32 kHz PWM for fine throttle control.
400KV variant: Pair with 13–15″ propellers on 6S LiPo for endurance and lift.
650KV variant: Pair with 11–13″ propellers on 4S–6S LiPo for responsive flight.
Enable Active Braking (Damped Light) for smooth descent control.
Mount using vibration-isolated standoffs to reduce sensor interference.
Use 14–16 AWG silicone wires for reliable current delivery.
Test thermal performance gradually during tuning and flight trials.

Safety & Maintenance Tips

Ensure long-term reliability and flight safety by following these guidelines:

Always balance propellers before flight to reduce vibration.
Avoid exceeding rated current and thrust limits to prevent overheating.
Maintain proper airflow and cooling around the motor during operation.
Inspect and lubricate bearings periodically with non-corrosive lubricants.
Keep operating temperature below 80°C for continuous flight.
Store motors in a dry, dust-free environment when not in use.

FAQs

The BOLT 3515 is ideal for medium-lift UAVs, cinematography drones, survey platforms, and inspection drones needing smooth, reliable thrust.

400KV: Focuses on efficiency, torque, and endurance for longer flights.
650KV: Prioritizes speed, responsiveness, and control for agile performance.

Up to 3.68 kg with the right propeller and voltage configuration.

Supports 4S–6S LiPo batteries depending on required flight style and propeller setup.

Yes, it’s compatible with quadcopters, hexacopters, and octocopters using 40A ESCs.

With IP-rated protection, heat-resistant materials, and balanced rotors, it performs reliably in professional field environments.

BOLT 3515 (400KV / 650KV) BLDC Motor

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Key Features

Build & Materials

Technical Tips for Optimal Performance

Safety & Maintenance Tips

FAQs

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