Bearings for Alternators & Starter Motors
An alternator is a rotating machine supplying power for a vehicle's electric system and charging the battery. The increasing demand for electrical power in cars and the quest for weight reduction is driving the development of high power alternators: more compact alternators, more current producing. This development trend is pushing up alternator speed and operating temperature. Both factors are significant in the selection of a suitable bearing solution.
Alternators work in a difficult environment. Engine assembly packaging has often exacerbated this condition by placing alternators in locations where they are more exposed to road-spray or close to the high temperature of the engine's exhaust system. With the requirement for operation in cold-climate starting and hot-climate motorway conditions, alternators must span a very wide operating temperature range, typically from 40 °C to highs approaching 200 °C. High speed alternators run at three to four times engine speed, so the alternator will be subjected to speeds, albeit for limited periods, in excess of 20,000 rev/min.
ZZ bearings for alternators
It is important to make various improvements in response to requirements for high-temperature, high-speed performance. Some technical breakthroughs in ZZ have been achieved which have contributed to ZZ alternator bearing specifications being what they are today. The most noteworthy among them was the development of new grease which eliminated the peculiar problem of early flaking in the outer rings of alternator front bearings. The breakthrough of high-temperature resistance seal material has greatly improved the life of automobile alternator bearings.
ZZ bearings for starters
All of ZZ bearings for car and truck starter motors meet rigorous quality standards and are guaranteed to work with your application. Since starter motors face a wide range of temperature and the operating speed are usually high (can reach 10000 rpm), ZZ offer synthetic grease that can suffer the temperature range of -40 C to 200 C. with good fatigue resistance characteristics. For the rubber sealed bearings, ZZ offer optimized sealing design for your requirement of high running speed and low torque.
It is important to make various improvements in response to requirements for high-temperature, high-speed performance. Some technical breakthroughs in ZZ have been achieved which have contributed to ZZ alternator bearing specifications being what they are today. The most noteworthy among them was the development of new grease which eliminated the peculiar problem of early flaking in the outer rings of alternator front bearings. The breakthrough of high-temperature resistance seal material has greatly improved the life of automobile alternator bearings.
ZZ bearings for starters
All of ZZ bearings for car and truck starter motors meet rigorous quality standards and are guaranteed to work with your application. Since starter motors face a wide range of temperature and the operating speed are usually high (can reach 10000 rpm), ZZ offer synthetic grease that can suffer the temperature range of -40 C to 200 C. with good fatigue resistance characteristics. For the rubber sealed bearings, ZZ offer optimized sealing design for your requirement of high running speed and low torque.
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