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NSK cylindrical roller bearings, NU 23 series: dimensions and part numbers
The NSK NU 23 series of cylindrical roller bearings brings together 28 part numbers in our catalogue across 27 basic sizes, from NU 2304 to NU 2340: bore (d) from 20 to 200 mm and outside diameter (D) from 52 to 420 mm. Every part number in the table links to its own page, where you can request a quote via WhatsApp or email.
NU 23 series dimension table
| Basic designation | d | D | B | Same size | Variants |
|---|---|---|---|---|---|
| NU 2304 | 20 | 52 | 21 | 20x52x21 | |
| NU 2305 | 25 | 62 | 24 | 25x62x24 | |
| NU 2306 | 30 | 72 | 27 | 30x72x27 | |
| NU 2307 | 35 | 80 | 31 | 35x80x31 | |
| NU 2308 | 40 | 90 | 33 | 40x90x33 | |
| NU 2309 | 45 | 100 | 36 | 45x100x36 | |
| NU 2310 | 50 | 110 | 40 | 50x110x40 | |
| NU 2311 | 55 | 120 | 43 | 55x120x43 | |
| NU 2312 | 60 | 130 | 46 | 60x130x46 | |
| NU 2313 | 65 | 140 | 48 | 65x140x48 | |
| NU 2314 | 70 | 150 | 51 | 70x150x51 | |
| NU 2315 | 75 | 160 | 55 | 75x160x55 | |
| NU 2316 | 80 | 170 | 58 | 80x170x58 | |
| NU 2317 | 85 | 180 | 60 | 85x180x60 | |
| NU 2318 | 90 | 190 | 64 | 90x190x64 | |
| NU 2319 | 95 | 200 | 67 | 95x200x67 | |
| NU 2320 | 100 | 215 | 73 | 100x215x73 | |
| NU 2322 | 110 | 240 | 80 | 110x240x80 | |
| NU 2324 | 120 | 260 | 86 | 120x260x86 | |
| NU 2326 | 130 | 280 | 93 | 130x280x93 | |
| NU 2328 | 140 | 300 | 102 | 140x300x102 | |
| NU 2330 | 150 | 320 | 108 | 150x320x108 | |
| NU 2332 | 160 | 340 | 114 | 160x340x114 | |
| NU 2334 | 170 | 360 | 120 | 170x360x120 | |
| NU 2336 | 180 | 380 | 126 | 180x380x126 | |
| NU 2338 | 190 | 400 | 132 | 190x400x132 | |
| NU 2340 | 200 | 420 | 138 | 200x420x138 |
Every part number in this series carries a suffix after the basic designation. The most frequent NSK suffixes, with the number of sizes they appear in: EM (10), ET (9), E (7), ET7 (1), 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: NU 23 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 NU 2306, 06 × 5 = 30 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 NSK cylindrical roller bearings series
Which NSK NU 23 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.