BEARINGDEX
Tapered roller

30310 bearing

50 mm bore, 110 mm outside diameter, 29.25 mm width (1.9685 × 4.3307 × 1.1516 in).

Dimensions

mminch
Bore d501.9685
Outside diameter D1104.3307
Width T29.251.1516

Quick numbers

Pitch diameter dm80.0 mm
Section height (D − d)/230.0 mm
n·dm at 1,800 rpm144,000
n·dm at 3,600 rpm288,000

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)
10Bore code 10 × 5 = 50 mm