Radial Play Deep Groove Ball Bearings with Inch 0.1875"X0.50"X0.196" and Grade ABEC-5

Jul 22, 2018 - Skateboard bearings often have an ABEC rating that indicates the level of precision and ... ABEC 5 bearings are the norm in skateboarding

The ABEC scale is an industry accepted standard for the tolerances of a ball bearing. It was developed by the Annular Bearing Engineering Committee (ABEC) of the American Bearing Manufacturers Association (ABMA). ... There are five classes from largest to smallest tolerances: 1, 3, 5, 7, 9

One (1) set of eight (8) Lucky Bearings Black Beauty Bearings from Lucky Bearings; Rating: Abec 5; Industry standard size: 608 with a 8mm core, 22mm outer 

Jul 13, 2002 - “Today, skateboard companies are selling bearings, mainly with ABEC 1, ABEC 3, ABEC 5, and ABEC 7 ratings. The common misconception is 

The ABEC rating system includes grades 1,3,5,7, and 9. The higher the ABEC rating, the tighter the tolerances are, making the bearing a more precision part