Brand We Carry
KOYO deep groove ball bearings, 64 series: dimensions and part numbers
The KOYO 64 series of deep groove ball bearings brings together 12 part numbers in our catalogue across 12 basic sizes, from 6403 to 6415: bore (d) from 17 to 75 mm and outside diameter (D) from 62 to 190 mm. Every part number in the table links to its own page, where you can request a quote via WhatsApp or email.
64 series size chart
| Basic designation | d | D | B | Same size | Variants |
|---|---|---|---|---|---|
| 6403 | 17 | 62 | 17 | 17x62x17 | |
| 6404 | 20 | 72 | 19 | ||
| 6405 | 25 | 80 | 21 | 25x80x21 | |
| 6406 | 30 | 90 | 23 | 30x90x23 | |
| 6407 | 35 | 100 | 25 | 35x100x25 | |
| 6408 | 40 | 110 | 27 | 40x110x27 | |
| 6409 | 45 | 120 | 29 | 45x120x29 | |
| 6411 | 55 | 140 | 33 | 55x140x33 | |
| 6412 | 60 | 150 | 35 | 60x150x35 | |
| 6413 | 65 | 160 | 37 | 65x160x37 | |
| 6414 | 70 | 180 | 42 | 70x180x42 | |
| 6415 | 75 | 190 | 45 | 75x190x45 |
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: 64 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 6406, 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.
More KOYO deep groove ball bearings series
Need a bearing from the KOYO 64 series?
Tell us the complete part number, or the size and variant, plus the quantity, and we'll send a quote by WhatsApp or email.