Review on 6204 2RS Sealed Bearing 20X47X14 Lubricated by Jermaine Shuster

I removed the seals and cleaned two bags of this grease. One bearing was as expected, smooth, clean, fast and worked as expected with some synthetic lube. The other bearing, on the other hand, covered its imperfections fairly well until I removed the seals and grease. I put it aside because of the horrible squeak/rattle. I ordered a second pair of 6204's to hopefully get a second good bearing to complete my project. These bearings will be used for a 3D printed jet engine so I won't be putting a lot of stress on it or generating heat at high speeds.