Arcing, which produces high temperatures at localized points, occurs when an electric
current that passes through a bearing is broken at the contact surfaces between the races
and rolling elements. Each time the current is broken while passing between the ball or
roller and race, it produces a pit on both parts. Eventually fluting develops. As it becomes
deeper, it creates noise and vibration. A high-amperage current, such as a partial short
circuit, will cause a rough, granular appearance. Heavy jolts of high-amperage charges
will cause more severe damage, welding metal from the race to the ball or roller. These
metal protrusions on the roller will, in turn, cause a crater effect in the race, generating
more noise and vibration.
Arcing, which produces high temperatures at localized points, occurs when an electric current that passes through a bearing is broken at the contact surfaces between the races and rolling elements. Each time the current is broken while passing between the ball or roller and race, it produces a pit on both parts. Eventually fluting develops. As it becomes deeper, it creates noise and vibration. A high-amperage current, such as a partial short circuit, will cause a rough, granular appearance. Heavy jolts of high-amperage charges will cause more severe damage, welding metal from the race to the ball or roller. These metal protrusions on the roller will, in turn, cause a crater effect in the race, generating more noise and vibration.
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