What precautions must be taken when using SEW gear reducers?

SEW gear reducers are manufactured by the U.S.-based SEW Group, which boasts world‑class production facilities. Its products are sold in markets around the globe, supported by a network of distributors worldwide, enabling it to deliver high‑quality products and services to customers everywhere while saving time and effort.

SEW gear reducers are designed based on a management system composed of control modules, with numerous motors integrated into a unified configuration. Each control module establishes a tightly coupled relationship between the system software and its components. However, during operation, SEW gear reducers require careful attention to certain issues to ensure their proper functioning.

For SEW gear reducers that have just been put into production, high‑temperature grease‑based industrial gear oil is already pre‑filled at the factory. After 200–300 operating hours, this high‑temperature lubricant must be replaced; otherwise, the oil level will no longer be sufficient to support continued operation. Additionally, oil changes are also necessary if the oil quality deteriorates—typically after 200–300 hours of operation, contaminants may accumulate or the oil’s properties may degrade, requiring immediate replacement. For SEW gear reducers in continuous long‑term service, oil should be changed every 5,000 hours or once a year. However, for gear reducers that have been idle for an extended period, fresh oil must be added before restarting.

In addition, the oil used to fill SEW gearboxes should be selected according to the original oil grade and a reputable brand; do not mix oils of different grades or viscosities, as this can cause serious damage to the gearbox. Furthermore, when changing the oil, it is crucial to avoid doing so while the gearbox is running, as this may harm the equipment. Allow the gearbox to cool down first, then disconnect the power supply before adding new oil. If, during the oil‑filling process, the temperature exceeds 80°C or the ambient temperature in the sump rises above 100°C, immediately stop operation, investigate the root cause of the overheating, and only resume use once the issue has been fully identified and resolved.

In summary, when using SEW gear reducers, operators should regularly inspect the oil quality; if the oil’s condition has deteriorated or contaminants are present, it must be replaced immediately. When the reducer is not in use, it should be properly stored by draining all internal oil channels until the next application, or by refilling with fresh lubricant or grease.