BEARINGDEX
Tapered roller

30303 bearing

17 mm bore, 47 mm outside diameter, 15.25 mm width (0.6693 × 1.8504 × 0.6004 in).

Dimensions

mminch
Bore d170.6693
Outside diameter D471.8504
Width T15.250.6004

Quick numbers

Pitch diameter dm32.0 mm
Section height (D − d)/215.0 mm
n·dm at 1,800 rpm57,600
n·dm at 3,600 rpm115,200

Compare against the maker's limiting speed. Speed calculator · L10 life

What the number means

3Tapered roller
03Dimension series 03: width 0, diameter 3 (medium)
03Bore code 03 is a fixed code for 17 mm