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）
IR172213 17 22 13 0.0155 IR inner circle
IRZ172214 17 22 14 0.0165 IR inner circle
IR172215.5 17 22 15.5 0.0183 IR inner circle
IR172216 17 22 16 0.019 IR inner circle
IR172216.5 17 22 16.5 0.0194 IR inner circle
IR172218 17 22 18 0.021 IR inner circle
IR172220.5 17 22 20.5 0.024 IR inner circle
IR172223 17 22 23 0.0265 IR inner circle
IRZ172224 17 22 24 0.028 IR inner circle
IR172225.5 17 22 25.5 0.03 IR inner circle
IR172226 17 22 26 0.031 IR inner circle
IR172232 17 22 32 0.038 IR inner circle
IR202416 20 24 16 0.0165 IR inner circle
IR202416.5 20 24 16.5 0.0175 IR inner circle
IR202420 20 24 20 0.0205 IR inner circle
IR202420.5 20 24 20.5 0.022 IR inner circle
IR202510.5 20 25 10.5 0.0143 IR inner circle
IR202515.5 20 25 15.5 0.021 IR inner circle
IR202516 20 25 16 0.022 IR inner circle
IR202517 20 25 17 0.023 IR inner circle