4015 PRO Motor

The 4015 PRO motor is a high-performance brushless motor designed for medium to large UAV applications. This documentation covers the 340 KV and 510 KV variants with detailed specifications and test data.

Key Features:

• High thrust up to 4,341 g (510 KV) for heavy-lift UAVs
• Lightweight design (165 g) for efficient flight
• Compatible with 14"–18" propellers for versatile applications
• Durable triple 619/4-2RS sealed bearings for long life
• Two KV options (340 KV & 510 KV) for different performance needs
• High power density (up to 6.14 W/g maximum)

340 KV

340 KV - Specifications

Motor Specifications:

• KV Rating: 340 RPM/V
• Kt (Motor Torque Constant): 0.032 Nm/A @ 5706 RPM
• Weight: 165 g ± 2 g
• Voltage Range: 22 V – 25 V (6S LiPo)
• Io (No Load Current @ 24 V): 0.9 A
• Max Continuous Current: 15 A (180 s)
• Max Continuous Power: 357 W (180 s)
• Power Density: 1.85 W/g (Rated), 2.68 W/g (Maximum)
• Motor Diameter: Ø 45.5 mm
• Motor Length: 30.9 mm
• Stick Out Shaft Diameter: Ø 3.8 mm
• Stator Poles: 18 S
• Magnetic Poles: 24 P
• Bearings: Triple 619/4-2RS Sealed
• Inductance per Phase (Winding Inductance): 0.042 (≈0.03) mH
• Resistance per Phase (Rph): 0.08 (≈0.03) Ω
• Motor Mount Pattern @ 90°: 4 × M3 @ PCD Ø 25 mm, depth: 3 mm
• Compatible Propeller Size: 14" to 18"
• Propeller Mount Pattern: 4 × M3 @ PCD Ø 12 mm, depth: 5 mm

Test Data - 340 KV

ACP 13 x 6.5 EP_FX Propeller

Test Conditions:

• ESC: HW 40A 6S
• Power Supply / Battery: TB – 22000 mAh 6S
• Test Date: 14-05-2025
• Environmental Temp: 31°C
• Humidity: 46%
• Cross-winds: Mild

PWM	Throttle %	Voltage (V)	Current (A)	RPM	Thrust (g)	Torque (N·m)	Power (W)	Efficiency (g/W)	Temp (°C)
1300	30	25.0	1.2	2841	238	0.05	29.9	8.0	45°C (@70% 10 min Constant)
1400	40	25.0	2.2	3719	407	0.08	53.9	7.6	45°C (@70% 10 min Constant)
1500	50	24.9	3.7	4680	658	0.12	93.0	7.1	45°C (@70% 10 min Constant)
1600	60	24.8	4.4	4995	752	0.14	108.6	6.9	45°C (@70% 10 min Constant)
1700	70	24.7	6.2	5702	1012	0.19	153.6	6.6	45°C (@70% 10 min Constant)
1800	80	24.6	8.9	6480	1322	0.25	217.9	6.1	47°C (Maximum)
1900	90	24.5	12.2	7197	1655	0.31	297.4	5.6	47°C (Maximum)
1950	95	24.4	12.8	7324	1725	0.33	312.8	5.5	47°C (Maximum)
2000	100	24.4	12.9	7314	1744	0.33	315.5	5.5	47°C (Maximum)

ACP 14 x 8.5 EP_FX Propeller

Test Conditions:

• ESC: HW 40A 6S
• Power Supply / Battery: TB – 22000 mAh 6S
• Test Date: 14-05-2025
• Environmental Temp: 31°C
• Humidity: 46%
• Cross-winds: Mild

PWM	Throttle %	Voltage (V)	Current (A)	RPM	Thrust (g)	Torque (N·m)	Power (W)	Efficiency (g/W)	Temp (°C)
1300	30	25.0	1.2	2445	254	0.06	30.5	8.3	47°C (@70% 10 min Constant)
1400	40	24.9	2.3	3184	434	0.11	57.5	7.5	47°C (@70% 10 min Constant)
1500	50	24.9	3.9	3926	683	0.16	95.9	7.1	47°C (@70% 10 min Constant)
1600	60	24.8	6.0	4671	1010	0.22	149.8	6.7	47°C (@70% 10 min Constant)
1700	70	24.6	8.9	5392	1337	0.29	218.5	6.1	47°C (@70% 10 min Constant)
1800	80	24.5	12.8	6062	1752	0.38	313.7	5.6	49°C (Maximum)
1900	90	24.3	17.5	6679	2063	0.48	424.9	4.9	49°C (Maximum)
1950	95	24.2	18.3	6804	2161	0.49	443.8	4.9	49°C (Maximum)
2000	100	24.2	18.6	6776	2127	0.51	450.5	4.7	49°C (Maximum)

SR 15 x 5.8 CF_FX Propeller

Test Conditions:

• ESC: HW 40A 6S
• Power Supply / Battery: TB – 22000 mAh 6S
• Test Date: 14-05-2025
• Environmental Temp: 31°C
• Humidity: 46%
• Cross-winds: Mild

PWM	Throttle %	Voltage (V)	Current (A)	RPM	Thrust (g)	Torque (N·m)	Power (W)	Efficiency (g/W)	Temp (°C)
1300	30	25.0	1.2	2519	263	0.06	30.4	8.7	47°C (@70% 10 min Constant)
1400	40	24.9	2.3	3272	484	0.10	56.9	8.5	47°C (@70% 10 min Constant)
1500	50	24.9	3.7	3984	739	0.15	92.3	8.0	47°C (@70% 10 min Constant)
1600	60	24.8	5.9	4690	1091	0.22	145.9	7.5	47°C (@70% 10 min Constant)
1700	70	24.7	8.6	5408	1454	0.28	211.5	6.9	47°C (@70% 10 min Constant)
1800	80	24.5	12.3	6085	1897	0.37	302.0	6.3	50°C (Maximum)
1900	90	24.3	16.8	6734	2351	0.47	409.4	5.7	50°C (Maximum)
1950	95	24.3	17.7	6820	2446	0.48	428.8	5.7	50°C (Maximum)
2000	100	24.3	17.6	6824	2426	0.48	427.8	5.7	50°C (Maximum)

Performance Summary:

• Best Efficiency: SR 15x5.8 CF_FX @ 30% throttle (8.7 g/W, 263g thrust)
• Maximum Thrust: SR 15x5.8 CF_FX @ 95% throttle (2,446g thrust, 5.7 g/W)
• Balanced Performance: SR 15x5.8 CF_FX @ 60% throttle (1,091g thrust, 7.5 g/W)
• Operating Temperature: 45-50°C depending on load and propeller
• Recommended Continuous: 70% throttle max for sustained flight

Recommended Applications - 340 KV

• Medium to large commercial UAVs
• Heavy payload applications
• Long-endurance missions
• Professional aerial photography

510 KV

510 KV - Specifications

Motor Specifications:

• KV Rating: 510 RPM/V
• Kt (Motor Torque Constant): 0.0235 Nm/A @ 6716 RPM
• Weight: 165 g ± 2 g
• Max Thrust: 4,341 g (with SR 16 X 5.4 CF_FX prop)
• Voltage Range: 22 V – 25 V (6S LiPo)
• Io (No Load Current @ 24V): 2.8 A
• Max Continuous Current: 25 A (180 s)
• Max Continuous Power: 600 W (180 s)
• Power Density: 4.15 W/g (Rated), 6.14 W/g (Maximum)
• Motor Diameter: Ø 45.5 mm
• Motor Length: 30.9 mm
• Shaft Diameter: Ø 3.8 mm
• Stator Poles: 18 S
• Magnetic Poles: 24 P
• Bearings: Triple 619/4-2RS Sealed
• Inductance per Phase (Winding Inductance): 0.018 (≈0.03) mH
• Resistance per Phase (Rph): 0.04 (≈0.03) Ω
• Motor Mount Pattern @ 90°: 4 × M3 @ PCD Ø 25 mm, depth: 3 mm
• Compatible Propeller Size: 14" to 18"
• Propeller Mount Pattern: 4 × M3 @ PCD Ø 12 mm, depth: 5 mm

Test Data - 510 KV

SR 16 X 5.4 CF_FX Propeller

Test Conditions:

• ESC: TM 60A 6S FLAME
• Battery: TB – 22000 mAh 6S
• Test Date: 22-01-2025
• Environmental Temp: 30°C
• Humidity: 24%
• Cross-winds: Mild

PWM	Throttle %	Voltage (V)	Current (A)	RPM	Thrust (g)	Torque (N·m)	Power (W)	Efficiency (g/W)	Temp (°C)
1300	30	24.6	3.4	3375	662	0.14	83.6	7.9	52°C (@70% 10 min Constant)
1400	40	24.4	6.4	4318	1116	0.22	156.2	7.1	52°C (@70% 10 min Constant)
1500	50	24.3	10.4	5195	1650	0.31	252.7	6.5	52°C (@70% 10 min Constant)
1600	60	24.0	15.6	6000	2164	0.41	374.4	5.8	52°C (@70% 10 min Constant)
1700	70	23.8	21.7	6716	2693	0.51	516.5	5.2	52°C (@70% 10 min Constant)
1800	80	23.5	29.2	7399	3310	0.62	686.2	4.8	56°C (Maximum)
1900	90	23.1	37.8	7956	3881	0.73	873.2	4.4	56°C (Maximum)
1950	95	22.9	43.9	8367	4249	0.79	1005.3	4.2	56°C (Maximum)
2000	100	22.9	44.3	8338	4341	0.81	1014.5	4.3	56°C (Maximum)

Tri Gemfan 1070 EP_FX Propeller

Test Conditions:

• ESC: TM 60A 6S FLAME
• Battery: TB – 22000 mAh 6S
• Test Date: 21-05-2025
• Environmental Temp: 36°C
• Humidity: 38%
• Cross-winds: Mild

PWM	Throttle %	Voltage (V)	Current (A)	RPM	Thrust (g)	Torque (N·m)	Power (W)	Efficiency (g/W)	Temp (°C)
1300	30	24.6	1.8	3811	252	0.05	44.3	5.7	53°C (@70% 10 min Constant)
1400	40	24.6	3.6	4968	439	0.09	88.6	5.0	53°C (@70% 10 min Constant)
1500	50	24.5	5.9	6014	673	0.13	144.6	4.7	53°C (@70% 10 min Constant)
1600	60	24.3	8.7	6982	936	0.18	211.4	4.4	53°C (@70% 10 min Constant)
1700	70	24.2	12.3	7910	1214	0.24	297.7	4.1	53°C (@70% 10 min Constant)
1800	80	24.0	16.7	8809	1505	0.30	400.8	3.8	55°C (Maximum)
1900	90	23.7	21.8	9635	1818	0.36	516.7	3.5	55°C (Maximum)
1950	95	23.6	25.7	10150	2031	0.41	606.5	3.3	55°C (Maximum)
2000	100	23.6	25.6	10144	2029	0.40	604.2	3.4	55°C (Maximum)

Tri Gemfan 1050 EP_FX Propeller

Test Conditions:

• ESC: TM 60A 6S FLAME
• Battery: TB – 22000 mAh 6S
• Test Date: 21-05-2025
• Environmental Temp: 36°C
• Humidity: 38%
• Cross-winds: Mild

PWM	Throttle %	Voltage (V)	Current (A)	RPM	Thrust (g)	Torque (N·m)	Power (W)	Efficiency (g/W)	Temp (°C)
1300	30	24.7	1.6	3906	204	0.04	39.5	5.2	54°C (@70% 10 min Constant)
1400	40	24.7	3.1	5122	374	0.07	76.6	4.9	54°C (@70% 10 min Constant)
1500	50	24.6	5.0	6268	591	0.11	123.0	4.8	54°C (@70% 10 min Constant)
1600	60	24.5	7.5	7399	833	0.15	183.8	4.5	54°C (@70% 10 min Constant)
1700	70	24.4	10.2	8302	1092	0.19	248.9	4.4	54°C (@70% 10 min Constant)
1800	80	24.2	13.6	9255	1375	0.23	329.1	4.2	57°C (Maximum)
1900	90	24.0	17.9	10170	1699	0.29	429.6	4.0	57°C (Maximum)
1950	95	23.9	21.2	10802	1938	0.33	506.7	3.8	57°C (Maximum)
2000	100	23.9	21.3	10794	1952	0.33	509.1	3.8	57°C (Maximum)

Tri Gemfan 1070 EP_FX Propeller

Test Conditions:

• ESC: TM 60A 12S FLAME
• Power Supply / Battery: 2 × TB – 22000 mAh 6S
• Test Date: 21-05-2025
• Environmental Temp: 36°C
• Humidity: 38%
• Cross-winds: Mild

PWM	Throttle %	Voltage (V)	Current (A)	RPM	Thrust (g)	Torque (N·m)	Power (W)	Efficiency (g/W)	Temp (°C)
1300	30	48.8	4.9	7259	864	0.15	114.0	3.6	90°C (@70% 10 min Constant)
1400	40	48.5	8.7	9277	1493	0.26	252.5	3.5	90°C (@70% 10 min Constant)
1500	45	48.0	10.7	10245	1838	0.30	321.7	3.6	90°C (@70% 10 min Constant)
1600	50	48.1	13.4	11002	2174	0.37	426.1	3.4	90°C (@70% 10 min Constant)
1700	55	47.9	16.3	11797	2543	0.44	543.3	3.3	90°C (@70% 10 min Constant)
1800	60	47.6	19.4	12537	2903	0.50	656.1	3.1	100+°C (Maximum)
1900	65	47.3	23.3	13355	3382	0.57	796.8	3.1	100+°C (Maximum)
1950	70	46.9	27.5	14056	3785	0.65	956.3	2.9	100+°C (Maximum)
2000	75	46.6	31.6	14772	4121	0.71	1097.8	2.8	100+°C (Maximum)

Tri Gemfan 1050 EP_FX Propeller

Test Conditions:

• ESC: TM 60A 12S FLAME
• Power Supply / Battery: 2 × TB – 22000 mAh 6S
• Test Date: 21-05-2025
• Environmental Temp: 36°C
• Humidity: 38%
• Cross-winds: Mild

PWM	Throttle %	Voltage (V)	Current (A)	RPM	Thrust (g)	Torque (N·m)	Power (W)	Efficiency (g/W)	Temp (°C)
1300	30	49.7	5.6	7157	968	0.19	278.3	3.5	90°C (@70% 10 min Constant)
1400	40	49.4	10.1	8982	1580	0.32	498.9	3.2	90°C (@70% 10 min Constant)
1500	45	49.2	12.8	9859	1898	0.38	629.8	3.0	90°C (@70% 10 min Constant)
1600	50	48.9	16.0	10689	2238	0.45	782.4	2.9	90°C (@70% 10 min Constant)
1700	55	48.6	19.3	11404	2503	0.52	938.0	2.7	90°C (@70% 10 min Constant)
1800	60	48.3	23.4	12178	2869	0.60	1130.2	2.5	100+°C (Maximum)
1900	65	48.0	28.2	12862	3212	0.69	1353.6	2.4	100+°C (Maximum)
1950	70	47.6	33.3	13521	3447	0.77	1585.1	2.2	100+°C (Maximum)
2000	75	47.2	38.4	14137	3712	0.84	1812.5	2.0	100+°C (Maximum)

Performance Summary:

• Best Efficiency: SR 16 X 5.4 CF_FX @ 30% throttle (7.9 g/W, 662g thrust)
• Maximum Thrust: SR 16 X 5.4 CF_FX @ 100% throttle (4,341g thrust, 4.3 g/W)
• Balanced Performance: SR 16 X 5.4 CF_FX @ 50% throttle (1,650g thrust, 6.5 g/W)
• Operating Temperature: 52-100°C depending on load and propeller
• Recommended Continuous: 70% throttle max for sustained flight

Recommended Applications - 510 KV

• Racing and high-speed UAVs
• Acrobatic flight applications
• High-performance missions
• Smaller propeller configurations

Common Resources

2D CAD Drawing

The 2D CAD drawing provides detailed dimensions and mounting specifications for the 4015 PRO motor.

Download 2D CAD Drawing

Drawing Specifications:

• Motor Mount Pattern @ 90°: 4 × M3 @ PCD Ø 30 mm, depth: 5 mm
• Propeller Mount Pattern: 4 × M3 @ PCD Ø 12 mm, depth: 5 mm
• Motor Diameter: Ø 42.5 mm
• Motor Length: 30.6 mm
• Stick Out Shaft Diameter: Ø 4 mm

Note: All dimensions in millimeters (mm). Specifications and drawings may be revised without notice.

Recommended ESC & Propeller

Compatible ESCs

Recommended Configurations:

ESC Rating	Application	Features
40-60A	General purpose	Standard BLHeli_32
60-80A	High performance	Advanced telemetry
80A+	Heavy lift	Enhanced cooling

ESC Requirements:

• Continuous rating: 40A minimum (60A recommended)
• Voltage support: 6S (22-25V) capable
• Protocol: DShot600 or higher recommended
• Features: Active braking, telemetry support

For detailed ESC specifications and compatibility, see ESC Overview.

Compatible Propellers

Tested Propeller Configurations:

Propeller Size	Pitch	Application	Performance
ACP 17×5.5	Medium	Efficiency	Very Good
ACP 18×6.1	High	High thrust	Good
TM 18×6.5	High	Balanced	Very Good
WM 18×6.1	High	Maximum thrust	Excellent
WM 18×7_K	Very High	Heavy lift	Very Good

Propeller Selection Guidelines:

• Start with WM 18×6.1 for best overall performance
• Use ACP 17×5.5 for efficiency-focused applications
• Use WM 18×7_K or 18×8_K for heavy lift applications
• Always balance propellers before installation
• Carbon fiber recommended for high performance

For more propeller options, see Propeller Overview.

System Integration

Complete System Recommendations:

1. Efficiency Build (Long flight time)

   • Motor: 4015 PRO 340KV
   • Propeller: ACP 17×5.5
   • ESC: 60A
   • Battery: 6S 8000mAh
   • Expected Performance: 1,857g thrust, 240+ seconds runtime

2. Balanced Build (General purpose)

   • Motor: 4015 PRO 340KV
   • Propeller: WM 18×6.1 CF_FX
   • ESC: 60A
   • Battery: 6S 6000mAh
   • Expected Performance: 2,459g thrust, 180-240 seconds runtime

3. Performance Build (Maximum thrust)

   • Motor: 4015 PRO 340KV
   • Propeller: WM 18×6.1 CF_FP
   • ESC: 80A
   • Battery: 6S 5000mAh
   • Expected Performance: 4,334g thrust, 150 seconds runtime

Maintenance and Inspection

Pre-Flight Checks

Before every flight:

• Visual inspection for physical damage
• Propeller balance and condition check
• Mounting bolt security verification
• Wire routing inspection (no contact with moving parts)
• Brief spin test (listen for unusual sounds)

Periodic Maintenance Schedule

Every 10 Flight Hours:

• Re-torque mounting bolts to specification
• Inspect threadlocker integrity
• Check bearing smoothness (manual rotation)
• Clean motor exterior with compressed air
• Inspect propeller for wear or damage

Every 50 Flight Hours:

• Detailed bearing inspection
• Shaft runout measurement
• Electrical connection integrity check
• Replace propeller if worn
• Document maintenance in flight log

Signs Requiring Immediate Inspection:

• Unusual vibration during operation
• Increased motor temperature (>65°C)
• Grinding or scraping sounds
• Reduced thrust output
• Propeller wobble

Bearing Replacement

Bearing Specifications:

• Type: Triple 619/5-2RS Sealed
• Service Interval: 100-150 flight hours (typical)
• Replacement Procedure: Contact technical support or refer to motor maintenance procedures

Signs of Bearing Wear:

• Grinding or rattling sounds
• Increased vibration
• Shaft play or wobble
• Difficulty rotating by hand
• Increased operating temperature

Comparison with Similar Motors

PRO Series Comparison

Feature	4015 PRO	6015 PRO
Weight	165 g	363-389 g
Max Thrust	4,341g (510KV)	9,980g (150KV)
Voltage	24V (6S)	48V (12S)
Prop Size	16-18"	22-24"
Application	Medium-Large UAVs	Large UAVs
Mounting	M3 bolts	M4 bolts
Power Density	2.48 W/g	4.22 W/g

SL Series Alternatives

| Feature | 4015 PRO | 4006 SL | 8008 SL | |---------|----------|----------| | Weight | 165 g | 67 g | 210 g | | Max Thrust | 4,341g | 2,208g (440KV) | ~10 kg | | Voltage | 24V (6S) | 48V (12S) | | Prop Size | 16-18" | 13-16" | 28-30" | | Build | Standard | Lightweight | Lightweight |

Selection Guide:

• 4015 PRO: Best for medium-large UAVs requiring high thrust capacity
• 4010 PRO: Lighter option for medium UAVs
• 6015 PRO: Higher thrust capacity with 12S voltage support
• 8008/8015 SL: Step up for large commercial UAVs

See Motor Overview for complete specifications.

Safety Notes

⚠️ Important Safety Information

Operational Safety:

• Never run motor without propeller attached (causes unbalanced load)
• Ensure proper cooling during extended operation
• Monitor motor temperature - do not exceed 65°C for sustained periods
• Inspect motor bearings regularly for wear
• Replace damaged propellers immediately

Electrical Safety:

• Verify correct ESC wiring before first power-up
• Use only 6S LiPo batteries (22-25V range)
• Do not exceed maximum continuous current (18A @ 180s)
• Ensure proper battery discharge rates (C-rating)

Installation Safety:

• Follow torque specifications exactly
• Never exceed maximum bolt depth (5mm for both motor mount and propeller mount)
• Verify rotation direction before propeller installation
• Maintain minimum 10mm clearance to frame

Emergency Procedures:

• If motor overheats (>65°C), land immediately
• If unusual vibration occurs, stop operation
• If motor makes grinding sounds, inspect bearings
• Always have emergency landing plan

Technical Support & Resources

Contact Information

• Technical Support: support@vectortechnics.com
• Phone Support: +918977744819 (Mon-Fri, 9AM-5PM IST)

Related Documentation

• Motor Installation Guide
• ESC Configuration Guide
• Propeller Selection Guide
• Motor Overview
• PRO Series

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Next Steps:

1. Review Installation Guide for mounting procedures
2. Select compatible ESC from tested configurations
3. Choose optimal propeller based on application
4. Review Motor Overview for system integration

Document Information:

• Revision: 1.0
• Last Updated: February 2026
• Product Code: VT-4015PRO-340KV / VT-4015PRO-510KV
• Document ID: VT-DOC-4015PRO-01

Note: Specifications and drawings may be revised without notice. Vector Technics assumes no liability for reliance on unverified data. All dimensions in millimeters (mm).