Angular Contact Bearingsare designed to carry heavier radial and thrust loads, but because of the open side of the outer race, thrust loads can only be taken in one direction. For this reason, angular contact bearings are usually used in pairs. If angular contacts are mounted next to each other, they must be flush ground to prevent over-preloading them when the assembly is clamped up. When this is required, the "G" suffix is used as follows: BAC-7088-G
Series-
Metric:
718 719 70 72 73
Cages are generally inner race land-riding and fully machined from Centrifugally Cast Brass Alloy. Outer races have a reduced land on one side to allow assembly. Instead of internal clearance, Angular Contact bearings are ordered to a certain contact angle for optimum performance as follows:
Expected Loading
Suffix
Con.Angle
Radial
Axial
A
30 degrees
Light
High
B
40 degrees
None
High
C
15 degrees
High
None
AC
25 degrees
High
High
If the application is such that Angular Contact Bearings are mounted in pairs, then they should be ordered “flush ground” so that pairs may be mounted back to back, face to face or in tandem with minimal internal play. These bearings may also be ordered in preloaded pairs to specific amounts of axial preload.
Suffix
Preload N (lbs)
G
0
G05
220(50)
G1
440(100)
G2
880(200)
Angular Contact Bearings are sold as single units. Those with a “G” suffix are individually boxed and can be used interchangeably in pairs. Those that are preloaded to a certain value are boxed in matched pairs and the box will indicate that “Qty. 2” bearings are enclosed.
