Official distributor
NTN cylindrical roller bearings, NU 4 series: dimensions and part numbers
The NTN NU 4 series of cylindrical roller bearings brings together 12 part numbers in our catalogue across 12 basic sizes, from NU 405 to NU 416: bore (d) from 25 to 80 mm and outside diameter (D) from 90 to 200 mm. Every part number in the table links to its own page, where you can request a quote via WhatsApp or email.
NU 4 series dimension table
| Basic designation | d | D | B | Same size | Variants |
|---|---|---|---|---|---|
| NU 405 | 25 | Dimension not validated | Dimension not validated | ||
| NU 406 | 30 | 90 | 23 | 30x90x23 | |
| NU 407 | 35 | 100 | 25 | 35x100x25 | |
| NU 408 | 40 | 110 | 27 | 40x110x27 | |
| NU 409 | 45 | 120 | 29 | 45x120x29 | |
| NU 410 | 50 | 130 | 31 | 50x130x31 | |
| NU 411 | 55 | 140 | 33 | 55x140x33 | |
| NU 412 | 60 | 150 | 35 | 60x150x35 | |
| NU 413 | 65 | 160 | 37 | 65x160x37 | |
| NU 414 | 70 | 180 | 42 | 70x180x42 | |
| NU 415 | 75 | 190 | 45 | 75x190x45 | |
| NU 416 | 80 | 200 | 48 | 80x200x48 |
In 12 of the 12 sizes the basic designation is also listed on its own, without a suffix. 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 4 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 406, 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. Where a dash appears, the dimension has not been validated yet: we confirm it when we quote.
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 NTN cylindrical roller bearings series
Which NTN NU 4 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.