![NU306 ECJ SKF](http://rpishop.ca/cdn/shop/files/NU306ECJSKF_{width}x.png?v=1687276719)
NU306 ECJ SKF
The ball bearing is a part allowing the rotation of a rotating element, also called "shaft" or "bearing", relative to a fixed element. The balls roll on this surface. Everything is lubricated with grease or oil to reduce friction and wear.