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Home > Products > 5.5 inch diameter 138mm tire width 39 opening 68 double-sided threaded shaft regular model
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5.5 inch diameter 138mm tire width 39 opening 68 double-sided threaded shaft regular model
5.5 inch diameter 138mm tire width 39 opening 68 double-sided threaded shaft regular model
This 5.5-inch brushless DC hub motor, with a 138mm diameter and suitable for 39mm tire widths, features a 68mm gear ratio and a double-sided threaded shaft. Its conventional design balances adaptability and stability. Suitable for a variety of small and medium-sized equipment scenarios, it offers easy installation and stable performance.
4-inch diameter 105mm tire width 42 opening 62 double-sided threaded shaft PU water guide groove
4-inch diameter 105mm tire width 42 opening 62 double-sided threaded shaft PU water guide groove
4-inch motor specifically designed for smart luggage: 105mm diameter x 42mm width, custom-made to perfectly match luggage wheel specifications; PU tread with water guide grooves for enhanced anti-slip performance and durability in wet conditions; 62mm gear opening + double-sided threaded shaft, supporting standardized assembly, eliminating the need for secondary processing and ensuring efficient installation; suitable for smart towing and automatic following luggage
5-inch diameter 130mm tire width 39mm gap 68mm double-sided threaded shaft low speed model - Hall sensor
5-inch diameter 130mm tire width 39mm gap 68mm double-sided threaded shaft low speed model - Hall sensor
5-inch low-speed motor: 130mm diameter for 39mm tire width, 68+ gear opening, double-sided threaded shaft design, built-in Hall effect sensor, precise speed control. Ideal for small equipment and precision scenes, it features stable installation, low speed stability, quiet operation, and durability.
3-inch diameter 70mm tire width 55 center hole piercing PU yellow tire-Hall sensor
3-inch diameter 70mm tire width 55 center hole piercing PU yellow tire-Hall sensor
3-inch micro motor (PU yellow rubber Hall effect model): Exclusively adapted for 70mm diameter × 55mm tire width, the PU yellow rubber tread improves wear resistance and cushioning; the center through-hole shaft structure facilitates integrated installation, and the built-in Hall effect sensor achieves high-precision signal feedback. It is suitable for micro smart devices, precision transmission scenarios, etc., and supports bulk purchase to meet the core needs of equipment manufacturers for "small size + high precision"!

Product Introduction

This 5.5-inch brushless DC hub motor, with a 138mm diameter and suitable for 39mm tire widths, features a 68mm gear ratio and a double-sided threaded shaft. Its conventional design balances adaptability and stability. Suitable for a variety of small and medium-sized equipment scenarios, it offers easy installation and stable performance.
5.5-inch-semi-diameter-138mm-tire-width-39-open-68-bilateral-threaded-shaft-conventional-model-6.png
Installation Instructions
1. Connect the motor to the controller and power supply according to the wiring diagram on the controller.
2. The tire is installed outside the outer rotor hub.
3. When the power cord passes through metal parts, it should be protected by non-metal products.
4. Special attention: When the motor is powered on by the driver and the motor does not move or freezes, or it heats up abnormally quickly, the power must be turned off and on within three seconds to adjust the electrical angle or drive output to avoid motor failure

Product Parameters

The main parameters

Number Projects Specification Remarks
1 Motor diameter 138mm (slight deviation including tire size) Subject to actual product
2 Rated voltage 36V
3 Rated power 350W
4 Rated rotating speed 400±50rpm
5 Rated current 6±0.5A
6 Theoretical torque 8.6 N/M
7 Degree of phases 120°
8 Number of poles 10 pole pairs 20PCS
9 Out of the shaft Double-threaded shaft (mm)
10 Lead exposed 500mm
11 Size of connectors 3+6 waterproof connector
12 Brake mode Electromagnetic brake
13 Shaft material 45cr (alloy steel)
14 Waterproof rating IP55
15 Maximum load 100kg
16 Environmental requirements -20℃ to 65℃
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Common problem

Q： What are some maintenance precautions when using this 5.5-inch DC brushless hub motor?
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A： To ensure long-term stable operation of the motor, please regularly check the tightness of the threaded shaft to prevent loosening; keep the bearings and gearbox clean to prevent foreign objects from entering; it is recommended to perform an insulation resistance test every 3 months to ensure electrical safety; avoid prolonged overload operation to extend service life. All our products undergo rigorous testing before leaving the factory, meeting industry standards and guaranteeing performance and reliability.
Q： What are the advantages of this motor's double-threaded shaft design?
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A： The double-threaded shaft improves installation accuracy and torque transmission efficiency, effectively reduces vibration and wear, and enhances overall machine stability. It is especially suitable for high-frequency use scenarios, demonstrating our engineering strength in detail design and our professional commitment to user experience.

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