Characteristic inner ring frequency, BPFI NTN HMK2420CT Drawn cup needle roller bearings

Fw:24 mm; D:31 mm; C:20 mm; Dw:2.5 mm; Lw:15.3 mm; Lubrication hole on outer ring:Non/No; Inner ring reference:No; Mass:0.03 kg; Cr:18.3 kN; C0r:28.2 kN; Nlim (grease):6,500 rpm; Nlim (oil):10,000 rpm; Min operating temperature, Tmin:-20 °C; Max operating temperature, Tmax:120 °C; Characteristic cag