30300 Series Bearings

30300 series (tapered, steep angle) — 9 sizes, ISO 15 boundary dimensions with cross-brand equivalents.

Sizes in this series

Designation	Bore	Outer Ø	Width	Cross-reference
30302	15 mm	42 mm	14.25 mm	equivalents →
30303	17 mm	47 mm	15.25 mm	equivalents →
30304	20 mm	52 mm	16.25 mm	equivalents →
30305	25 mm	62 mm	18.25 mm	equivalents →
30306	30 mm	72 mm	20.75 mm	equivalents →
30307	35 mm	80 mm	22.75 mm	equivalents →
30308	40 mm	90 mm	25.25 mm	equivalents →
30309	45 mm	100 mm	27.25 mm	equivalents →
30310	50 mm	110 mm	29.25 mm	equivalents →

Boundary-dimension reference only. Verify suffixes before substituting.