IR inner circle

The IR series is a standard inner ring for needle roller bearings, without rollers or retainers. It is only used for high-precision grinding of the raceway inner ring and is suitable for use with various types of needle roller bearings without inner rings. It compensates for the problem of insufficient hardness/accuracy of the shaft neck, improves the overall bearing capacity and service life of the bearing, and can be press fit on the shaft neck for use. It is suitable for radial support scenarios of general industrial equipment.

Model Basic Dimensions Basic rated dynamic load Weight Type
Inner diameter Outer diameter Thickness Dynamic load Static load
[mm] [mm] [mm] (kN) (kN) （kg）
IRZ202518 20 25 18 0.024 IR inner circle
IR202520 20 25 20 0.027 IR inner circle
IR202520.5 20 25 20.5 0.028 IR inner circle
IR202523 20 25 23 0.031 IR inner circle
IR202525.5 20 25 25.5 0.0345 IR inner circle
IR202526 20 25 26 0.036 IR inner circle
IR202526.5 20 25 26.5 0.036 IR inner circle
IR202530 20 25 30 0.0405 IR inner circle
IRZ202531 20 25 31 0.0415 IR inner circle
IR202532 20 25 32 0.044 IR inner circle
IR222616 22 26 16 0.0175 IR inner circle
IR222620 22 26 20 0.024 IR inner circle
IR222817 22 28 17 0.0305 IR inner circle
IR222820.5 22 28 20.5 0.037 IR inner circle
IR222823 22 28 23 0.042 IR inner circle
IR222830 22 28 30 0.055 IR inner circle
IR252920 25 29 20 0.025 IR inner circle
IR252930 25 29 30 0.038 IR inner circle
IR253015 25 30 15 0.0245 IR inner circle
IR253015.5 25 30 15.5 0.0255 IR inner circle