How to identify: roller bearings and needle roller bearings
There are some similarities between the two bearings, but at the same time there are many differences. The same point is that there are needle rollers added, the difference is that the needle roller bearing outer diameter surface is cylindrical and thin and long, while the roller bearing is different, its outer diameter surface is both cylindrical and arc-shaped, making it more convenient to use.
Needle roller bearings do not use a sealed structure, and roller bearings are sealed, so needle roller bearings need to manually add lubricating oil, and roller bearings reduce the inconvenience of manual addition due to the lubricating oil inside the sealed bearing, and also make the use of bearings more clean.
