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FJR Motorcycle Forums
Technical & Mechanical Problems
Front wheel bearing failure
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<blockquote data-quote="motorcycle-ed" data-source="post: 445433" data-attributes="member: 9344"><p>Warchild is right on. We are in the motor manufacturing (and sometimes rebuilding) biz and NEVER would we re-use a ball bearing. Even if it was brand new, and say...installed wrong and we had to remove it using professional tools that do not apply force to the outer race, we would never take the risk. Ball bearings have a very small contact area with the race for an individual ball. In applied use, this force is moving positions all the time and distributed over several balls, but when removing a bearing it takes very little force to brinell a bearing race, which means you have put a little dimple in the race caused by the ball pressing into the race due to the very small contact area and an applied force. Once the race has a dimple in it, then bearing failure is a certainty, given some time.</p><p></p><p>In short...like Dale says, never re-use a ball bearing if it has been removed or struck with something like a drift. In fact, if you hit something hard enough to bend the rim, you likely would have already brinelled the bearing races and should have replaced them even if the dealer had NOT removed them.</p><p></p><p>Ed</p></blockquote><p></p>
[QUOTE="motorcycle-ed, post: 445433, member: 9344"] Warchild is right on. We are in the motor manufacturing (and sometimes rebuilding) biz and NEVER would we re-use a ball bearing. Even if it was brand new, and say...installed wrong and we had to remove it using professional tools that do not apply force to the outer race, we would never take the risk. Ball bearings have a very small contact area with the race for an individual ball. In applied use, this force is moving positions all the time and distributed over several balls, but when removing a bearing it takes very little force to brinell a bearing race, which means you have put a little dimple in the race caused by the ball pressing into the race due to the very small contact area and an applied force. Once the race has a dimple in it, then bearing failure is a certainty, given some time. In short...like Dale says, never re-use a ball bearing if it has been removed or struck with something like a drift. In fact, if you hit something hard enough to bend the rim, you likely would have already brinelled the bearing races and should have replaced them even if the dealer had NOT removed them. Ed [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Front wheel bearing failure
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