Rolling bearings in electric motors and generators

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www.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 223-3071 1 Rolling bearings in electric machines Deep groove ball bearings 20 www.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 223-3071
www.bergab.ru 1 Rolling bearings in Берг electric АБ machines bergab@ya.ru Тел. (495)-228-06-21, факс (495) 223-3071 Deep groove ball bearings Deep groove ball bearings Deep groove ball bearings are most typically found in both the locating and non-locating positions of small to medium sized electric motors and in the locating position of medium to large sized electric motors and generators. Quiet running is one of the most important advantages of the deep groove ball bearing over other types of rolling element bearings. A varied assortment and economical price levels also make deep groove ball bearings very popular. Features and benefits of SKF deep groove ball bearings Along with quiet running, low cost and a varied assortment, there are many other features that make deep groove ball bearings a common choice for electric motors. Deep groove ball bearings have low friction and high-speed capability. They can carry radial, axial and combined loads, making them suitable for use in both the locating and non-locating positions of the motor. Axial springs can be used with nonlocating deep groove ball bearings to further reduce noise and vibration levels. Deep groove ball bearings with seals or shields on both sides are lubricated for life and require no maintenance. Benefits of SKF deep groove ball bearings include: • A large range of greased-for-life bearings. • A variety of greases including an ultra quiet SKF standard grease, as well as food grade greases for food, pharmaceutical and medical applications and in particular wide temperature greases that contribute to longer grease life. • Low friction and reduced sensitivity to misalignment. • Highly efficient sealing options including contact seals, low friction seals and shields. grease, based on a polyurea thickener with an ester base oil, can be used in applications where temperatures range from −40 °C to +160 °C (−40 °F to +320 °F) (➔ table 1 on page 62). Other greases for specific environments (e.g. food, pharmaceutical and medical applications) and extreme temperature conditions (e.g. ovens, smoke extraction motors) can also be supplied on demand. Please consult the SKF application engineering service. SKF Explorer deep groove ball bearings – the high performance class With the SKF Explorer performance class of deep groove ball bearings, SKF goes even further by allowing all customers to benefit from solutions developed for advanced applications. Typical examples of SKF Explorer features are: • Optimized internal geometry and rolling contact surface • Upgraded ball quality • ISO class P6 for dimensional accuracy and closer tolerances on width deviation • Depending on sizes, running accuracy up to 2 classes better than Normal • High cleanliness steel Such features provide SKF Explorer deep groove ball bearings with substantial improvement in accuracy, which results in superior performance in quiet running and speed capability. It also results in longer service life. 1 For high performance electric motors (e.g. frequency inverter fed motors), SKF has developed a specific range of shielded and sealed bearings prefilled with a high performance wide temperature grease (designation suffix WT). This www.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 223-3071 21
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Rolling bearings in electric motors and generators

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