Angular Contact Ball Bearings

Features:
Angular contact ball bearings in a tandem arrangement are used when the actual thrust force exceeds the thrust load capacity of a single angular contact ball bearing , Single row angular contact ball bearings in tandem arrangement must always be adjusted against another bearing inversely arranged for shaft guidance in the opposite direction , angular contact ball bearings in spindle bearing design must not be exposed to any misalignments .Angular contact bearings better support "combined loads" (loading in both the radial and axial directions) and the contact angle of the bearing should be matched to the relative proportions of each. The larger the contact angle (typically in the range 10 to 45 degrees), the higher the axial load supported, but the lower the radial load. In high speed applications, such as turbines, jet engines, dentistry equipment, the centrifugal forces generated by the balls will change the contact angle at the inner and outer race.

Angular contact ball bearings suffix as below:
DB : Two bearings matched back-to-back
DF : Two bearings matched face-to-face
DT : Two bearings matched in tandem
C: 15° contact angle
B : 40° contact angle
M: brass cage
P: nylon cage

The main types of angular contact ball bearings:
■ Single row angular contact ball bearings
718 Series Angular Contact Bearings
719 Series Angular Contact Bearings
70 Series Angular Contact Bearings
B70 Series Angular Contact Bearings
72 Series Angular Contact Bearings
Precision series (Reference super precision bearings series )
■ Double row angular contact ball bearings
■ Four-point contact ball bearings

Parameter:

Suffixes - Internal design	Stands for
A	30° contact angle
AB	20° contact angle (Inch bearing )
AC	25° contact angle
B	40° contact angle
E	Optimized internal design
Suffixes - External design (seals, snap ring groove, execution etc.)	Stands for
N1	One locating slot (notch) in one outer ring side face
CA	Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance smaller than Normal (CB).
CB	Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have Normal axial internal clearance.
CC	Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance greater than Normal (CB).
G	Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance.
GA	Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have light preload.
GB	Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have moderate preload.
GZ	Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have heavy preload.
Suffixes - Cage design	Stands For
F	Machined steel cage, ball centred
J	Stamped steel cage, ball centred
M	Machined brass cage, ball centred; different designs are identified by a number following the M, e.g. M2
MB	Machined brass cage, inner ring centred
P	Glass fibre reinforced PA66 cage, ball centred
PH	Glass fibre reinforced PEEK cage, ball centred
Y	Stamped brass cage, ball centred
Suffixes - Accuracy, clearance, preload, quiet running	Stands For
P5	Dimensional and running accuracy to P5 tolerance class
P6	Dimensional and running accuracy to P6 tolerance class
Suffixes - Bearing sets, matched bearings	Stands For
DB	Two bearings matched for mounting back-to-back
DF	Two bearings matched for mounting face-to-face
DT	Two bearings matched for mounting in tandem