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）
IR151825.5 15 18 25.5 0.0152 IR inner circle
IR151916 15 19 16 0.0125 IR inner circle
IR151916.5 15 19 16.5 0.0136 IR inner circle
IR151920 15 19 20 0.016 IR inner circle
IR151920.5 15 19 20.5 0.0123 IR inner circle
IR152012 15 20 12 0.012 IR inner circle
IR152013 15 20 13 0.0135 IR inner circle
IRZ152014 15 20 14 0.0145 IR inner circle
IR152015.5 15 20 15.5 0.0164 IR inner circle
IR152018 15 20 18 0.019 IR inner circle
IR152020.5 15 20 20.5 0.0215 IR inner circle
IR152023 15 20 23 0.024 IR inner circle
IRZ152024 15 20 24 0.025 IR inner circle
IR152026 15 20 26 0.028 IR inner circle
IR172016.5 17 20 16.5 0.0111 IR inner circle
IR172020 17 20 20 0.014 IR inner circle
IR172020.5 17 20 20.5 0.0137 IR inner circle
IR172030.5 17 20 30.5 0.0205 IR inner circle
IR172116 17 21 16 0.0145 IR inner circle
IR172120 17 21 20 0.018 IR inner circle