The metal balls expand, reducing internal clearance until the bearing seizes entirely.
Because these are often found in "set-it-and-forget-it" machinery, they are frequently overlooked—until they start generating excessive heat. Why is your 369958z Bearing Getting Hot? 369958z hot
The is a workhorse, but it isn't invincible. Heat is its way of telling you that something—be it friction, load, or alignment—is out of balance. By catching a "hot" bearing early, you save yourself the massive cost of a full engine or machine teardown. The metal balls expand, reducing internal clearance until