This is a replacement Blade 3x7x3mm Bearing Set, and is intended for use with the Blade 450 and 450 X helicopters.
This product was added to our catalog on March 29, 2012
To replace the bearings: First, I removed the e-clip with an X-Acto blade. Next, removed the lower/outer bearing with a small pin punch, a ball peen hammer, and a PVC pipe fitting. The fitting allows the bearing to press out. Then, I removed the upper/inner bearing with a medium-sized pin punch, and a 7mm 1/4" drive socket. The socket, allows the bearing to press out, and it also protects the armature windings from damage.
To insert the replacement bearings, I used an RPM bearing blaster and automotive brake cleaner to remove the manufacturing residue, and lubricated with Trinity bearing oil. I then used a soft-faced hammer and a soft block to press the upper/inner bearing in, and the same socket to press the opposite bearing in. I also used a medium pin punch and a ball peen hammer to ensure the bearings were fully pressed, making certain I was striking the outer bearing race and not the inner race or bearing shield.
Overall, the previous bearings lasted five years, and the replacement cost is 1/10th the retail price of a new motor! So, the bearing set is worth it if you have a few hand tools and some know-how....