N3 Series Cylindrical Roller Bearings

N3 series — 30 sizes, ISO 15 boundary dimensions with cross-brand equivalents.

Sizes in this series

Designation	Bore	Outer Ø	Width (B)	Cross-reference
N304	20 mm	52 mm	15 mm	equivalents →
N305	25 mm	62 mm	17 mm	equivalents →
N306	30 mm	72 mm	19 mm	equivalents →
N307	35 mm	80 mm	21 mm	equivalents →
N308	40 mm	90 mm	23 mm	equivalents →
N309	45 mm	100 mm	25 mm	equivalents →
N310	50 mm	110 mm	27 mm	equivalents →
N311	55 mm	120 mm	29 mm	equivalents →
N312	60 mm	130 mm	31 mm	equivalents →
N313	65 mm	140 mm	33 mm	equivalents →
N314	70 mm	150 mm	35 mm	equivalents →
N315	75 mm	160 mm	37 mm	equivalents →
N316	80 mm	170 mm	39 mm	equivalents →
N317	85 mm	180 mm	41 mm	equivalents →
N318	90 mm	190 mm	43 mm	equivalents →
N319	95 mm	200 mm	45 mm	equivalents →
N320	100 mm	215 mm	47 mm	equivalents →
N321	105 mm	225 mm	49 mm	equivalents →
N322	110 mm	240 mm	50 mm	equivalents →
N324	120 mm	260 mm	55 mm	equivalents →
N326	130 mm	280 mm	58 mm	equivalents →
N328	140 mm	300 mm	62 mm	equivalents →
N330	150 mm	320 mm	65 mm	equivalents →
N332	160 mm	340 mm	68 mm	equivalents →
N334	170 mm	360 mm	72 mm	equivalents →
N336	180 mm	380 mm	75 mm	equivalents →
N338	190 mm	400 mm	78 mm	equivalents →
N340	200 mm	420 mm	80 mm	equivalents →
N344	220 mm	460 mm	88 mm	equivalents →
N348	240 mm	500 mm	95 mm	equivalents →

Boundary-dimension reference only. Verify suffixes before substituting.