schoep
05-23-2008, 11:59 PM
As a beginner around 250 -300 flights on my copter it started making a very ugly sound and landed it'self. Upon investagation it had puked the lower bearing in the motor. As a resourceful flyer I have become a fixit chep kind of guy as working on the enginering marvel that these are ,i'm is much into the mechanics as the flying although I prefer the flying. I found that the inner race was very easy to remove(after the almost invisable balls fell out), the outer race was Quite the challenge! With a dental pick I discovered there was nothing to grap onto or drive it out ,so I challeged a gunsmith friend of mine to pull the outer race. He tried to tap and pull the race with a 1/4 -28 bottom tap and discovered that it worked best on the alum just under the race. Put it in the lathe and couldn't touch the race(hand cranked) with a drill bit. So I brought it home and ground it out with a dental bit,drilled a hole in the alum. to bust it in 2. Now i'm ordering a bearing (2)from Boco Brearing (3x7x3) And I'll have an extra motor(bought a new motor) And the repair will be easyer next time but, I jones if I don't fly. It upset's me that E-flight dosn't make that bearing servicable as everything else seems to be. the upper bearing is just as bad but its not as tourqued upon as the lower. I'm 55 and this is my first real hobby and I love a challange. This fourm would be easyer with spellcheck!
:cheers
:cheers