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）
IR121522.5 12 15 22.5 0.011 IR inner circle
IR121612 12 16 12 0.008 IR inner circle
IR121612.5 12 16 12.5 0.0085 IR inner circle
IR121613 12 16 13 0.0085 IR inner circle
IRZ121614 12 16 14 0.0096 IR inner circle
IR121616 12 16 16 0.0105 IR inner circle
IR121616.5 12 16 16.5 0.0112 IR inner circle
IR121620 12 16 20 0.0135 IR inner circle
IR121620.5 12 16 20.5 0.0139 IR inner circle
IR121622 12 16 22 0.0145 IR inner circle
IR121622.5 12 16 22.5 0.0152 IR inner circle
IRZ121623 12 16 23 0.0155 IR inner circle
IR121715.5 12 17 15.5 0.0136 IR inner circle
IR121720.5 12 17 20.5 0.018 IR inner circle
IR141717 14 17 17 0.0095 IR inner circle
IR151812.5 15 18 12.5 0.0075 IR inner circle
IR151815.5 15 18 15.5 0.0093 IR inner circle
IR151816.5 15 18 16.5 0.0099 IR inner circle
IR151817.5 15 18 17.5 0.010 IR inner circle
IR151820.5 15 18 20.5 0.0123 IR inner circle