Lubrication hole on inner ring NTN NK55/25R+1R50X55X25 with inner ring

d:50 mm; D:68 mm; C:25 mm; F:55 mm; rs min:0.6 mm; s max:1.5 mm; Dw:3.5 mm; Lw:18.8 mm; Lubrication hole on outer ring:Oui/Yes; k:3 mm; Inner ring reference:1R50X55X25; Lubrication hole on inner ring:Non/No; Radial clearance class:CN; Precision class:P0; Mass:0.27 kg; Brand:NTN; Cr:41 kN; C0r:82 kN;