Gear Motors

Gear Motors

Gear Motors in Stock

Gear motors are rotary hydraulic actuators that convert hydraulic pressure and flow into mechanical torque and rotation through the action of meshing gears. Compact, economical, and ruggedly reliable, gear motors deliver smooth rotation with high starting torque, making them a popular choice for light- to medium-duty hydraulic drives. Our comprehensive inventory spans fixed displacement gear motors in single and multiple configurations, engineered for fans, conveyors, augers, winches, and other rotary applications.

Hengyuhang combines robust manufacturing capacity with specialized engineering expertise to produce high-performance gear motors. Manufactured to stringent international quality standards, our gear motors deliver the reliability, efficiency, and long service life required to serve as direct, drop-in replacements for leading international brands. When standard equipment cannot meet specific technical demands, our facility designs and manufactures entirely custom gear motor solutions — from rapid prototyping to full-scale production — engineered strictly to your operational parameters and application needs.

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What Is a Gear Motor?

A gear motor is a rotary hydraulic actuator that converts hydraulic energy into mechanical torque and rotation using a pair of meshing gears. Pressurized fluid enters the motor and forces the gears to rotate, driving the output shaft. Gear motors are valued for their simple, compact construction, low cost, and reliable performance, delivering consistent rotation with high starting torque across a wide speed range for light- and medium-duty applications.

Types of Gear Motors

Gear motors are generally classified by their gear arrangement and construction.

External gear motors are the most common type. They use two intermeshing gears that rotate in opposite directions within a close-tolerance housing, delivering a simple, economical, and robust drive solution for a wide range of rotary applications.

Internal gear motors position a smaller inner gear inside a larger outer gear, separated by a crescent-shaped seal. They offer quieter operation and are well suited to higher-viscosity fluids.

Gear motors are also available in single, double, and multiple section configurations, with bidirectional or unidirectional rotation to match your system.

Applications of Gear Motors

Gear motors drive rotary functions across a wide range of industries:

  • Fans, blowers, and cooling systems

  • Conveyors, augers, and feed systems

  • Winches and hoists

  • Agricultural and turf equipment

  • Sweepers and road maintenance machinery

  • Light industrial machinery

  • Utility and material handling equipment

Features of Gear Motors

  • Compact, lightweight design with high starting torque

  • Simple construction for reliable, long service life

  • Smooth, consistent rotation across a wide speed range

  • Economical and easy to maintain

  • Wide range of displacements and mounting options

  • Direct interchangeability with leading international brand models

Techspecs of Gear Motors

Typical specification range (customized to each model):

Parameter Typical Range
Displacement 2 – 200 cc/rev
Max. continuous pressure up to 250 bar
Max. torque up to 500 Nm
Speed range 200 – 3000 rpm
Direction of rotation bidirectional / unidirectional
Port type threaded or flange
Mounting flange SAE A / SAE B / ISO
Shaft type keyed, splined
Operating temperature -20 °C to +80 °C
Fluid viscosity 10 – 800 cSt

Contact us for the exact specification sheet of any specific model.

Gear Motor Replacement

Hengyuhang gear motors are engineered as direct, dimensionally interchangeable replacements for leading international brands, delivering equal or better performance at a competitive price with long service life. Our replacement range covers:

ARGO-HYTOS, ASEDA, ATOS, B&C, BLUEASCEND, Boden, BONDIOLI, Brevini, BUCHER, Caproni, CASAPPA, CONCENTRIC, DANFOSS, DAVID BROWN, DUPLOMATIC, ECKERLE, Galtech, GPD, GRH, HANSA-TMP, HESPER, HIDRAULICA, HOERBIGER, HONOR, HPI, HYDAC, HYDRECO, HYDROMAX, HYDRONIT, HYTEK, JCB, JIHOSTROJ, JOYANG, KOMPASS, KOMATSU, KRACHT, MARZOCCHI, MetaHydra, METARIS, NACHI, NIHON SPEED, OKDO, PARKER, PERMCO, REXPOWER, Rexroth, REXROTH-SIGMA, RONZIO, ROQUET, SALAMI, SCENERY, SDH, SETTIMA, SHIMADZU, STEIMEL, SUMITOMO, SUNNY, VIVOLO, VOITH.

Simply tell us your existing model number, and we will match the correct interchange.

Gear Motor Selection Guide

To select the right gear motor, confirm the following parameters:

  1. Required torque (Nm) and speed (rpm)

  2. Displacement (cc/rev) and available flow and pressure

  3. Direction of rotation and mounting style

  4. Shaft type and port orientation

  5. Single or multiple section configuration

When in doubt, provide your existing motor model or application details, and our engineers will recommend the optimal match.

Gear Motor OEM Service

Hengyuhang provides high-quality gear motor OEM batch customization and production services. You can supply your own design and drawings, or let our engineering team design the motor to your specification. We offer flexible branding options — private label (your logo / part number) or no label — with full support from prototyping and testing to mass production and consistent quality control.

Gear Motor Manufacturer

Hengyuhang is a professional gear motor manufacturer and supplier, offering a complete range of standard and custom gear motors with reliable quality, competitive pricing, and dependable delivery to customers worldwide.

FAQ of Gear Motors

1. What is a gear motor used for?
Gear motors are used to drive rotary functions such as fans, conveyors, augers, winches, and other light- to medium-duty equipment in agricultural, industrial, and mobile applications.

2. What is the difference between a gear motor and a gear pump?
A gear pump converts mechanical energy into fluid power, while a gear motor converts fluid power back into mechanical torque and rotation.

3. What types of gear motors are available?
Gear motors are available in external and internal configurations, in single, double, and multiple section versions.

4. Can your gear motors replace other brands?
Yes. Our gear motors are engineered as direct, dimensionally interchangeable replacements for leading international brands.

5. Do you offer custom or OEM gear motors?
Yes. We offer OEM batch customization — you can provide the design, or we can design the motor to your specification, with optional private labeling.

6. What is the MOQ for OEM orders?
MOQ is flexible depending on the model and customization requirements. Contact us for a tailored quotation.

7. What is your lead time?
Lead time depends on quantity and customization. Standard models ship quickly; custom orders are confirmed at quotation.

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