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）
IR556334 55 63 34 0.192 IR inner circle
IR556345 55 63 45 0.255 IR inner circle
IR556530 55 65 30 0.22 IR inner circle
IR556560 55 65 60 0.435 IR inner circle
IR606825 60 68 25 0.15 IR inner circle
IR606834 60 68 34 0.206 IR inner circle
IR606835 60 68 35 0.21 IR inner circle
IR606845 60 68 45 0.275 IR inner circle
IR607025 60 70 25 0.195 IR inner circle
IR607030 60 70 30 0.24 IR inner circle
IR607060 60 70 60 0.48 IR inner circle
IR657225 65 72 25 0.145 IR inner circle
IR657234 65 72 34 0.193 IR inner circle
IR657245 65 72 45 0.255 IR inner circle
IR657335 65 73 35 0.235 IR inner circle
IR657530 65 75 30 0.26 IR inner circle
IR657560 65 75 60 0.52 IR inner circle
IR708025 70 80 25 0.225 IR inner circle
IR708030 70 80 30 0.275 IR inner circle
IR708035 70 80 35 0.31 IR inner circle