The MAXYNOS THOR 2318 (Titan High-Power Outrunner) is a series of planetary-gearbox brushless DC motors designed for compact size, maximum torque, high speed, and high energy efficiency in robotics, automation, and motion-control applications.
THOR motors feature an external-rotor design that delivers significantly higher torque while maintaining excellent thermal stability and energy efficiency.
The MAXYNOS THOR series offers an exceptional size-to-power ratio and peak torque output, engineered for creators, builders, and professionals who demand nothing but the best.
Key Features:
24 mm planetary gearbox available in three gear ratios (19:1, 27:1, and 51:1).
6 mm D-shape shaft and 3.5 mm motor wires bullet connectors.
Motor available in two kV ratings, the 1250 kV variant is optimized for speed and torque, while the 625 kV variant optimized for torque and efficiency.
Maxynos THOR 2318- 1250 kV Output Performance (Continuous Operation) Measured at 25 °C ambient
Gear Ratio
Test Voltage (V)
Rated Current (A)
Rated Power (W)
Nominal Torque (N.m)
Nominal Speed (RPM)
No-Load Speed (RPM)
19:1
15
8.0
80
1
505
954
27:1
15
8.0
80
1.6
385
675
51:1
15
8.0
80
2.4
193
366
Maxynos THOR 2318- 625 kV Output Performance (Continuous Operation) Measured at 25 °C ambient
Gear Ratio
Test Voltage (V)
Rated Current (A)
Rated Power (W)
Nominal Torque (N.m)
Nominal Speed (RPM)
No-Load Speed (RPM)
19:1
15
4
60
0.9
175
488
27:1
15
4
60
1.4
128
344
51:1
15
4
60
2.2
63
184
Note: Rated power is specified for the bare motor (without gearbox) at the rated voltage. The nominal torque and speed values shown are output-shaft values after the planetary gearbox and account for typical gearbox efficiency (≈70% for 19:1 and 27:1 ratios, ≈60% for the 51:1 ratio).
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Specifications:
1250 kV Motor Specifications:
Motor kV: 1250 RPM/V
Operating Voltage Range: 7-15 V
Rated Voltage: 15 V
Rated Current: 8 A
Rated Mechanical Power: 85 W
No-Load Current: 0.4 A
Number of Poles: 14
Internal Resistance: 0.53 Ohm
Connector: 3.5 mm bullet plug
625 kV Motor Specifications:
Motor kV: 625 RPM/V
Operating Voltage Range: 7-18 V
Rated Voltage: 18 V
Rated Mechanical Power: 35 W
No-Load Current: 0.14 A
Rated Current: 4 A
Number of Poles: 14
Internal Resistance: 1.6 Ohm
Connector: 3.5 mm bullet plug
Planetary Gearbox – Number of Stages – Exact Reduction Ratio – Efficiency:
Gear ratio 19:1 → 2 Stages → Exact reduction ratio 19.20:1 → 70%
Gear ratio 27:1 → 2 Stages → Exact reduction ratio 26.85:1 → 70%
Gear ratio 51:1 → 3 Stages → Exact reduction ratio 50.89:1 → 60%
Planetary Gear Motor Weight:
THOR 2318 gear ratio 19:1 weight = 70 g
THOR 2318 gear ratio 27:1 weight = 70 g
THOR 2318 gear ratio 51:1 weight = 77 g
Downloads
Download complete technical documentation for the MAXYNOS THOR-2318 high-torque brushless DC gear motor. This Datasheet provides detailed electrical specifications, torque-RPM-current curves, gearbox dimensions, weight, and operating limits for engineering, robotics, and industrial applications.
THOR 2318 comes equipped with a premium planetary gearbox, providing smooth acceleration, minimal backlash, and enhanced load handling — making it the ideal choice for robotics, RC vehicles, and smart automation projects.
THOR series offers an exceptional size-to-power ratio, peak torque output, and rugged reliability — engineered for creators, builders, and professionals who demand nothing but the best.
High Power Outrunner
Next-Generation Brushless Motor Technology Replaces traditional brushed motors with a more efficient, longer-lasting solution. Offers reduced maintenance, lower heat, and higher reliability over time. High-Torque OutRunner Design: Featuring an external rotor that spins around the stator, this motor generates significantly higher torque at lower speeds. This design improves thermal stability and energy efficiency, eliminating the need for bulky gearing and simplifying your project's design.
Motor Dimensions in mm
Motor Connection Guide
Connecting your brushless motor to the ESC is simple: both components have three wires.
The middle wire of the motor must always connect to the middle wire of the ESC. Do not change this connection.
You can swap the left and right wires if you want to reverse the motor’s rotation direction.
Note: Only one motor can be connected to one ESC. Therefore, each motor requires a dedicated ESC.
FAQs
Do you ship your products Worldwide?
Yes. We ship worldwide and process most orders within 24 hours for fast and secure delivery.
What voltage should I use with the Maxynos THOR 2318?
The THOR 2318 is available in two kV variants.
The 1250 kV version is rated for operation up to 15 V and is suitable for 3S and 4S LiPo packs.
The 625 kV version is rated for operation up to 18 V and can be used with 3S, 4S, and 5S LiPo packs.
Always follow the rated voltage and continuous current limits shown in the performance tables to ensure safe and reliable operation.
What does the kV rating mean on a motor?
kV represents the motor’s speed constant in RPM per volt at the motor shaft. In a geared motor, the gearbox reduces the output speed while increasing torque. A higher kV provides more speed, while a lower kV provides higher torque and better efficiency.
Motor Speed (RPM) = (Motor kV value) × (Applied Voltage) → Example: 1250 kV Motor speed at 14 V → 1000 × 14 = 17,500 RPM
Gearbox Speed (RPM) = Motor speed ÷ Exact reduction ratio → Example: Gear speed (RPM) at Ratio 27:1 & 14 Volts → 17,500 ÷ 26.85 = 651 RPM
What is the current limit of the THOR 2318, and how do I avoid overloading the motor?
The 1250 kV variant is rated for operation up to 15 V, which makes it compatible with 3S and 4S LiPo packs. However, this motor is current-limited, not voltage-limited.
At 15 V the continuous current rating is 8 A. If the motor is heavily loaded or stalled, the current can rise well above this level. In stall conditions, current will rise to 11–13 A, which can rapidly overheat and damage the motor.
For this reason:
3S LiPo is recommended for general use, as it provides a larger safety margin against over-current.
4S LiPo may be used if current is actively limited by the controller, or ahigh-ratio gearbox (such as 51:1) is used, which reduces the likelihood of stalling and limits current rise.
If 4S is used with low gear ratios or without current limiting, a stall can exceed the safe current limit and cause overheating or failure.
The 625 kV variant is rated for operation up to 18 V and has a lower no-load speed and higher torque per amp. At 15 V, this motor operates well below its voltage limit, so even under stall conditions the current remains within a safer thermal range.
This makes the 625 kV version more tolerant of heavy loads and temporary stalls compared to the 1250 kV variant.
Maxynos performance data is based on continuous operation within rated current and thermal limits. Staying within these limits ensures reliable and long-term motor operation.
How do I choose between the 1250 kV and 625 kV variants?
Choose 1250 kV if your priority is maximum output speed and peak performance. It is the better option when you want higher RPM.
Choose 625 kV if your priority is efficiency and continuous torque performance. It produces more torque per amp, typically runs cooler at the same output torque, and is a better choice for applications where maintaining lower current draw matters, with the tradeoff of lower output speed.
What ESC should I use with the THOR 2318?
Use a high-quality bidirectional brushless ESC rated for at least 15 A continuous current. MAXYNOS 45 ESC is fully compatible and recommended for optimal performance and braking control.
What is the difference between rated torque and stall torque?
Rated torque is the maximum torque the motor can produce continuously without overheating. Stall torque is the theoretical maximum at zero speed and should not be used for continuous operation.
Does the THOR Motor require special maintenance?
No routine maintenance is required. The planetary gearbox is permanently lubricated and sealed for long service life. Avoid exceeding rated current and torque limits to ensure maximum lifespan.
Which THORE motor should I choose for my project?
Choosing the correct THOR motor depends on your application’s required torque, speed, size, weight, and efficiency.
The THOR series covers a wide range of motion needs:
THOR 2318
The smallest and lightest option (70 g). Ideal for compact robots, small mechanisms, and applications where space and weight are critical.
THOR 2826 and THOR 2830
Mid-size motors that offer a balance between size, torque, and power. These are well suited for medium-duty robotics, mobile platforms, and general automation projects.
THOR 3548
The largest and most powerful option. Designed for applications that require high torque, high power, and continuous operation, such as heavy robots, AGVs, and industrial motion systems.
Each THOR motor is available in multiple kV ratings and gear ratios, allowing you to fine-tune output speed, torque, and current draw for your specific application.
Every Maxynos motor includes a dedicated technical datasheet that provides:
Rated and no-load torque
Output RPM for each gear ratio
Input current
Motor weight and dimensions
2D mechanical drawings
Performance curves
These datasheets allow you to accurately select the right motor based on your mechanical load, voltage, speed, and thermal limits before purchasing.
Choosing a selection results in a full page refresh.
