Founded in 1995, China Dongda Power Industry Co., Ltd. is one of the few gear motor manufacturer and distributor in China that has patents on the generator, motor, power supply, engine, alternator, diesel and gearmotor design, supply and sale. Our custom gear motors has obtained the certifications of ISO9001-2000, GS/TUV, CE, VL, EPA, QHS, SON, CAP and SRS and we have won EPA 2005 Motor Year Certification. Our 30 QC staff carefully performs inspections at every stage of production, from the time we receive raw materials to packaging. Noise, power, and stability are tested to ensure that our engines can endure 580 hours of constant use. We also can design and deliver OEM/ODM samples in one month.

PMDC gear motor applied for electric bicycle. 250W, 350W. 24V, 36V. 380rpm. Rare Earth Material.
These gear motors are available as flange or foot mounts. The output shaft can be either single or double solid outputs. A hollow shaft output version is also available with an optional torque arm. The ratings are as follows: Ratings: (0.25-30) hp Ratios: (5.1-60): 1 Output Torque: up to 10,000 in.-lb.
Important performance specifications to consider when searching for gearmotors include shaft speed, continuos torque, continuos current, and continuous output power. The terminal voltage is the design DC motor voltage. The continuous torque is the output torque capability of the motor under constant running conditions. Continuous current is the maximum rated current that can be supplied to the motor windings without overheating. Continuous output power is the mechanical power provided by the motor output.

Gear motors are designed and manufactured to be installed within another device. The installation place should have ambient temperature of about 14 F ~ 104 F and ambient humidity of maximum 85%. The motor should not be exposed to explosive, flammable gas, to direct sunlight, dust, water, and oil. It should be placed where heat can easily escape. Using gearmotors in location that does not satisfy the conditions can damage the motor. Gearmotor service factors and load classifications should confirm to AGMA recommendations. The minimum service factor should be 1.0 for continuous operation and the minimum gearing service factor should be 1.0 with a minimum mechanical strength service factor of 1.3.

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