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）
IR708040 70 80 40 0.358 IR inner circle
IR708054 70 80 54 0.49 IR inner circle
IR708060 70 80 60 0.56 IR inner circle
IR758525 75 85 25 0.24 IR inner circle
IR758530 75 85 30 0.29 IR inner circle
IR758535 75 85 35 0.335 IR inner circle
IR758540 75 85 40 0.385 IR inner circle
IR758554 75 85 54 0.52 IR inner circle
IR809025 80 90 25 0.255 IR inner circle
IR809030 80 90 30 0.31 IR inner circle
IR809035 80 90 35 0.355 IR inner circle
IR809040 80 90 40 0.408 IR inner circle
IR809054 80 90 54 0.55 IR inner circle
IR859526 85 95 26 0.28 IR inner circle
IR859530 85 95 30 0.33 IR inner circle
IR859536 85 95 36 0.39 IR inner circle
IR8510035 85 100 35 0.575 IR inner circle
IR8510046 85 100 46 0.76 IR inner circle
IR8510063 85 100 63 1.04 IR inner circle
IR9010026 90 100 26 0.295 IR inner circle