Important dimensions to consider when searching for angular contact bearings include design units, bore, outside diameters, and outer ring width.  Design units can be in either inches or metric units.  Some manufacturers may specify parts in both.  The bearing industry uses a standard number system for bearings with metric diameter bores.  For bore sizes 04 and up multiply by 5 to obtain the bore in millimeters.  If the bore is a hex enter the dimension across the flats.  If the bore is tapered enter the smaller diameter.  The outside diameter of the [angular contact bearings] includes the housing if a housed unit, but excludes the flange if a flanged bearing.

Important operating specifications to consider when searching for angular contact bearings include rated speed, static radial load, and dynamic radial load.  The rated speed for a bearing running with grease lubrication is lower than a bearing with oil lubrication.  The static radial load is the maximum radial load bearing can endure without excessive permanent deformation.  The dynamic radial load is the calculated constant radial load, which a group of identical skf bearings with stationary outer rings can theoretically endure for a rating life of 1 million revolutions of the inner ring.

Manufacturers typically assign an ABEC rating to bearings.  ABEC (Annular Bearing Engineers' Committee) ratings classify different accuracy and tolerance ranges for bearings. The higher the ABEC number the tighter the bearing tolerances.  Please consult tables in the search form for Angular Contact Bearings for tolerances and other rating equivalents.

Angular contact bearings can have a number of different styles of seals or shielding.  Seals and shields provide protection from contamination and as a retainer for lubricant.  Seals provide better protection and lubricant containment than shields, but have lower maximum speed capabilities.  Types include single seal, double seal, single shield, and double shield.  Angular contact bearings may be constructed of special materials including stainless steel, plastic, and ceramic hybrid.  They may also be plated; common plating materials are cadmium and chrome.

Bearing design for angular contact bearings can be one directional thrust, double direction thrust, double row, double row maximum capacity angular, duplex thrust, and four-pointed contact.  Thin-section bearings have small cross-sections with respect to their diameter.   Bearings with ball screw support are specially designed for use in ball screw or lead screw applications.  Some bearings may also be flanged.  Angular contact bearings may have a variety of lubrication options.  They can be relubricatable, prelubricated, and solid lubrication.

Double direction axial angular contact ball bearings are non self-retaining precision bearings with restricted tolerances to class SP. They comprise solid shaft locating washers, spacer rings, housing locating washers and ball and cage assemblies with solid brass cages. The parts of the iko bearings are matched to each other and can be fitted independently of each other; they must not be interchanged with those of bearings of the same size.