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）
IR303516 30 35 16 0.0315 IR inner circle
IR303517 30 35 17 0.0335 IR inner circle
IRZ303518 30 35 18 0.035 IR inner circle
IR303520 30 35 20 0.0385 IR inner circle
IR303520.5 30 35 20.5 0.04 IR inner circle
IR303523 30 35 23 0.044 IR inner circle
IR303525.5 30 35 25.5 0.051 IR inner circle
IR303526 30 35 26 0.052 IR inner circle
IR303530 30 35 30 0.059 IR inner circle
IR303530.5 30 35 30.5 0.06 IR inner circle
IRZ303531 30 35 31 0.061 IR inner circle
IR303532 30 35 32 0.064 IR inner circle
IR303820 30 38 20 0.065 IR inner circle
IR323720 32 37 20 0.0435 IR inner circle
IR323730 32 37 30 0.063 IR inner circle
IR324020 32 40 20 0.069 IR inner circle
IR324027 32 40 27 0.092 IR inner circle
IR324036 32 40 36 0.123 IR inner circle
IR354017 35 40 17 0.039 IR inner circle
IR354020 35 40 20 0.046 IR inner circle