Brand we market

SKF cylindrical roller bearings, N 3 series: dimensions and part numbers

The SKF N 3 series of cylindrical roller bearings brings together 43 part numbers in our catalogue across 23 basic sizes, from N 303 to N 334: bore (d) from 17 to 170 mm and outside diameter (D) from 47 to 360 mm. Every part number in the table links to its own page, where you can request a quote via WhatsApp or email.

All SKF cylindrical roller bearings →SKF guide →

N 3 series dimension table

SKF cylindrical roller bearings, N 3 series: boundary dimensions in millimetres according to ISO 15 and catalogue part numbers.
Basic designation	d	D	B	Same size	Variants
N 303	17	47	14	17x47x14	N 303 ECP
N 304	20	52	15	20x52x15	N 304 ECP
N 305	25	62	17	25x62x17	N 305 ECP
N 306	30	72	19	30x72x19	N 306 ECP
N 307	35	80	21	35x80x21	N 307 ECP
N 308	40	90	23	40x90x23	N 308 ECP
N 309	45	100	25	45x100x25	N 309 ECP
N 310	50	110	27	50x110x27	N 310 ECP
N 311	55	120	29	55x120x29	N 311 ECM/P63 N 311 ECP
N 312	60	130	31	60x130x31	N 312 ECM N 312 ECP N 312 M/P63
N 313	65	140	33	65x140x33	N 313 ECM N 313 ECP N 313 ECP/C3
N 314	70	150	35	70x150x35	N 314 ECP
N 315	75	160	37	75x160x37	N 315 ECM N 315 ECP N 315 ECP/C3
N 316	80	170	39	80x170x39	N 316 ECP N 316 ECP/C3
N 317	85	180	41	85x180x41	N 317 ECP N 317 ECP/C3
N 318	90	190	43	90x190x43	N 318 ECP N 318 ECP/C3
N 319	95	200	45	95x200x45	N 319 ECM N 319 ECM/C3 N 319 ECP N 319 ECP/C3
N 320	100	215	47	100x215x47	N 320 ECM N 320 ECM/C3 N 320 ECP
N 321	105	225	49	105x225x49	N 321 ECP
N 322	110	240	50	110x240x50	N 322 ECM N 322 ECM/C3 N 322 ECP
N 324	120	260	55	120x260x55	N 324 ECM N 324 ECM/C3 N 324 ECP N 324 ECP/C3
N 326	130	280	58	130x280x58	N 326 ECP
N 334	170	360	72	170x360x72	N 334 ECM

Every part number in this series carries a suffix after the basic designation. The most frequent SKF suffixes, with the number of sizes they appear in: ECP (22), C3 (9), ECM (9), P63 (2), and M (1). The suffix defines the variant (sealing, cage, internal clearance or other options): to request a quote, send us the full part number marked on the bearing, the box or the drawing.

How to read the part number: N 3 gives the bearing type and the dimension series; for the same bore, each series has a different outside diameter and width. What follows is the bore code: from 04 upwards, multiplying by 5 gives the bore in millimetres (in the N 306, 06 × 5 = 30 mm); 00, 01, 02 and 03 stand for 10, 12, 15 and 17 mm.

The table gives the boundary dimensions of each basic designation according to ISO 15, in millimetres: d is the bore, D the outside diameter and B the width. These are standardised dimensions: the same basic designation has the same dimensions in every brand.

If the part number on the bearing can no longer be read, measure the bore, the outside diameter and the width, and find the matching row: with that size and the variant you need, we will quote it.

Other SKF cylindrical roller bearings series

Which SKF N 3 series bearing do you need?

Send us the full part number, or the size and the variant, with the quantity: we will quote it via WhatsApp or email.

Request a quote on WhatsApp ventas@mraccesoriosindustriales.com

See all SKF bearings references →