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）
IR5710 5 7 10 0.0014 IR inner circle
IR5812 5 8 12 0.003 IR inner circle
IR5816 5 8 16 0.004 IR inner circle
IR6810 6 8 10 0.0017 IR inner circle
IR6912 6 9 12 0.0032 IR inner circle
IR6916 6 9 16 0.0043 IR inner circle
IR61010 6 10 10 0.004 IR inner circle
IRZ61012 6 10 12 0.0046 IR inner circle
IR7910 7 9 10 0.0019 IR inner circle
IR71010.5 7 10 10.5 0.0032 IR inner circle
IR71012 7 10 12 0.0036 IR inner circle
IR71012.5 7 10 12.5 0.0039 IR inner circle
IR71015.5 7 10 15.5 0.0048 IR inner circle
IR71016 7 10 16 0.005 IR inner circle
IR81011 8 10 11 0.0024 IR inner circle
IR81210 8 12 10 0.0048 IR inner circle
IR81210.5 8 12 10.5 0.0051 IR inner circle
IRZ81212 8 12 12 0.0057 IR inner circle
IR81212.5 8 12 12.5 0.006 IR inner circle
IR81215.5 8 12 15.5 0.0075 IR inner circle