Many people have encountered this situation: a new Motor Orbital OMS unit initially delivers ample power and runs with strong performance, but after some time in use, it gradually loses power. It starts sluggishly, loses speed under even slight loads, and its efficiency drops significantly when operating at full throttle. This type of gradual power decline is often not caused by sudden failure, but rather by the slow wear of internal components and a gradual increase in internal leakage. Many people are unable to identify the root cause and are forced to replace the entire unit, resulting in significant additional costs.
The primary cause of this gradual power loss in the Motor Orbital OMS is wear on the rotor-stator assembly. The rotor and stator are the core components responsible for the motor’s torque output. Over time, as they engage repeatedly in hydraulic fluid containing impurities, scratches form on their mating surfaces, and the sealing clearance gradually widens. High-pressure oil flows back through these worn gaps—a phenomenon commonly referred to as increased internal leakage. As a result, a significant amount of pressure is lost internally, and the torque delivered to the shaft end decreases accordingly. The noticeable effect is that the motor feels increasingly weak with continued use. Another major cause is the failure of the needle roller assembly. Subjected to prolonged compression and friction, the needle rollers develop pitting, spalling, and deformation, causing the transmission fit to lose precision. This leads to a decline in the motor’s mechanical efficiency and makes it more prone to vibration and slippage at low speeds.
Conventional Motor Orbital OMS motors are limited by material and manufacturing processes, resulting in insufficient hardness of the rotor, stator, and needle columns, as well as minimal wear allowance. In operating conditions such as agricultural machinery and mining auxiliary equipment, where oil cannot be kept absolutely clean, fine hard particles continuously erode the friction pairs, significantly accelerating the wear process and leading to power loss in a short period. HANJIU has implemented targeted reinforcements on the core friction pairs of the orbital motor OMS. By selecting high-wear-resistant base materials combined with precision heat treatment processes, we enhance the surface hardness and fatigue resistance of the rotor, stator, and pin columns, thereby slowing the wear rate of the meshing surfaces and curbing the continuous increase in internal leakage.
In addition to base material reinforcement, HANJIU exercises precise control over the fit tolerances of the orbital motor OMS. A reasonable and stable meshing clearance ensures smooth startup and stable low-speed operation while reducing the ineffective backflow of high-pressure hydraulic fluid. Many low-cost products suffer from significant tolerance fluctuations; while they may perform acceptably when new, internal leakage skyrockets rapidly once even slight wear sets in. The optimized Motor Orbital OMS features a more gradual wear curve, preventing noticeable power loss in the short term and delivering better power consistency during long-term operation, thereby reducing downtime caused by mid-operation power decay.
Of course, even the best wear-resistant design cannot function without proper oil selection and filtration maintenance. If filter elements are not replaced for extended periods and the oil remains consistently contaminated, even the most wear-resistant friction pairs will experience accelerated wear. HANJIU also reminds users to regularly inspect the oil and replace filter elements on schedule; this, combined with the motor’s wear-resistant design, further extends the machine’s effective operational lifespan.
Gradual power decline is primarily caused by rotor-stator wear, pin failure, and increased internal leakage. The HANJIU Motor Orbital OMS relies on reinforced, wear-resistant core components to slow down performance degradation caused by wear, maintaining stable torque output over the long term. This helps users avoid the frustration of “losing power the more it’s used” and reduces the cost of frequent motor replacements.
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