Review on 🔧 XiKe 6001 2RS 12x28x8mm Pre-Lubricated High-Performance Ball Bearing by Omar Alradwan

They are manufactured with decent accuracy. actually had the right amount of lube. good price. So what's the downside? Vaseline grease with a room temperature dropping point will drain at operating temperature. One of them was dirty and needed cleaning and relubrication. Worst of all, there is no groove on the inner ring, so the lip of the inner seal doesn't hold the elements. not for harsh conditions. won't last long unless you want to clean and oil them frequently. Recommended only for relatively clean environments where lack of compaction is not critical.