Straight hole open type

The straight hole open type self-aligning ball bearing is the basic universal type of self-aligning ball bearing. It adopts a classic structure of cylindrical straight hole inner ring+open unsealed+double row steel balls+outer ring spherical raceway. The core has the characteristics of self centering, easy installation, and flexible lubrication. It is mainly suitable for light medium load and large coaxiality deviation working conditions. It has no taper, no seal, and no additional locking structure. It is one of the most widely used basic bearings in industrial equipment and is suitable for general light medium load scenarios such as textiles, conveyors, agricultural machinery, and reducers.

Model Basic Dimensions Basic rated dynamic load WeightType
Inner diameter Outer diameter Thickness Dynamic load Static load
[mm] [mm] [mm] (kN) (kN) （kg）
1228 140 250 50 163 74 11.2 Straight hole open type
13030 150 225 56 57.2 23.6 7.5 Straight hole open type
1230 150 270 54 180 86 14.6 Straight hole open type
13036 180 280 74 95.6 40 16 Straight hole open type
13940 200 280 60 60.5 29 10.7 Straight hole open type
13944 220 300 60 60.5 30.5 11 Straight hole open type
13948 240 320 60 60.5 32 11.3 Straight hole open type