The ABEC scale is a system of rating the manufacturing tolerance of precision bearings. The system was developed by the Annular Bearing Engineering Council (ABEC), a division of the American Bearing Manufacturers' Association ABMA). The ABMA was formerly known as the Anti-Friction Bearing Manufacturers' Association. Bearings rated under the ABEC systems are typically called "precision bearings", with a rating or class from 1 to 9. ABEC 1 meets a looser tolerance and ABEC 9 meets high precision tight bearing tolerances.

Precision Rating: ABEC 1 to ABEC 9.

Seals Type: Open, Teflon Sealed or Rubber Seals,

Vibration level codes: V4, V3, V2, V1

Noise Level: Z1, Z2, Z3, Z4

Material: Chrome, Stainless, Full Ceramic or Hybrid...

Retainer: Nylon, PEEK Or Stainless Steel

Lubrication: Oil, Grease or Dry