BEARINGDEX
Tapered roller

30204 bearing

20 mm bore, 47 mm outside diameter, 15.25 mm width (0.7874 × 1.8504 × 0.6004 in).

Dimensions

mminch
Bore d200.7874
Outside diameter D471.8504
Width T15.250.6004

Quick numbers

Pitch diameter dm33.5 mm
Section height (D − d)/213.5 mm
n·dm at 1,800 rpm60,300
n·dm at 3,600 rpm120,600

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

What the number means

3Tapered roller
02Dimension series 02: width 0, diameter 2 (light)
04Bore code 04 × 5 = 20 mm