This Ball Bearing is sealed on both sides. This genuine Makita replacement part is sold individually. rnrn • Ball bearings minimize friction between rotating parts in your tool. The balls or rollers bear the load and spin, distributing the weight evenly, while the minimal contact area of the balls reduces friction. This reduces wear on the tool, allowing it to run smoothly. rn • Bearings experience constant wear when the tool is in operation from pressure, heat, vibration and friction. Because of this, many Bearings need periodic maintenance or replacement.
As many woodworkers know, power tools made ten plus years ago are better than new one\'s, so if you can find the parts..there is value in fixing it yourself. Disassembly of this Makita sander is easy - just be sure you have several sizes of Phillips head screw drivers on hand - those factory installed screws are in there tight - don\'t st
... Read morerip them. Pretty easy diagnostic- the lower bearing was frozen - getting it off the spindle takes a little work - go easy. Putting the new bearing is simple - just be sure it is seated all the way on to the shaft. Take your time with the reassembly - be sure the brushes are seated correctly and the shaft turns freely. Since many of the housing and internal pieces are plastic don\'t force them - be sure they are lined up correctly before tightening all the screws. $15.00 and my favorite sander is back in action. Good luck to you on your project.
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Bearing was bad on Makita BO4510 sander purchased at a yard sale
1. Dismantled sander to determine which bearing was bad.
2. Found the bottom motor bearing was bad
3. Removed the armature and used a small gear puller to remove the bad bearing
4. Pressed the replacement bearing in the shaft using a deep socket and hammer
5. Removed the seals on the remaining bearings and re-packe
... Read mored them with low viscosity grease
6. Replaced worn brushes
7. Reassembled the sander and tested it.
8. Now I have a sander that runs like new.
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An old sander that had a bad bearing and ruined brushes.
had to take the sander completely apart. The brushes were an easy fix. It was tough to get the old bearing off the shaft and set the new bearing on the shaft. It took some ingenuity and a loy more time than i expected. The bearing was an exact fit. Thank goodness for the right parts. The sander is now ready for the next 40 years.
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