Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Automatic candidate selection
One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Data incomplete
“BK4520” across 2 loaded brands
The base designation is shared, but too few brands have complete boundary dimensions. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | SKFBK 4520Drawn cup needle roller bearing with a closed end | KOYOBK4520Needle roller bearings |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | KOYO |
| Designation | BK 4520 | BK4520 |
| Product family | Needle roller bearings | Drawn cup needle roller bearings / Metric series, caged |
| Detailed type | Drawn cup needle roller bearing with a closed end | Needle roller bearings |
| Outside diameterD | 52 mm | 52 mm |
| WidthB | 20 mm | — |
| Basic dynamic load ratingC | 26 kN | 26.3 kN |
| Basic static load ratingC0 | 60 kN | 55.4 kN |
| Fatigue load limitPu | 7.2 kN | 8.8 kN |
| Reference speednref | 5600 r/min | — |
| Limiting speednG | 6300 r/min | 4600 r/min |
| Mass≈m | 0.071 kg | 0.079 kg |
| Sealing | Without | — |
| Cage | Sheet steel | — |
| Bearing material | Bearing steel | — |
| Lubricant | None | — |
| Classification | ||
| Official Category Path | — | Needle roller bearings - Drawn cup needle roller bearings - Metric series, caged |
| Official Classification 1 | — | Needle roller bearings / Drawn cup needle roller bearings / Metric series, caged |
| Dimensions | ||
| Bore diameter of needle roller complement | 45.0 mm | — |
| Engineering — Associated products | ||
| Inner ring IR series | IR 40x45x20.5 | — |
| Inner ring LR series | LR 40x45x20.5 | — |
| Radial shaft seal with a low cross-sectional height, single lip | G 45x52x4 | — |
| Radial shaft seal with a low cross-sectional height, double lip | SD 45x52x4 | — |
| Engineering — Dimensions | ||
| Diameter under rollersF w | 45 mm | — |
| Depth of the drawn cup BKC 1 | min. 17.3 mm | — |
| Chamfer dimension drawn cup (outer ring)r | min. 0.8 mm | — |
| Logistics | ||
| Product net weight | 0.071 kg | — |
| eClass code | 23-05-09-03 | — |
| UNSPSC code | 31171512 | — |
| Manufacturer Identity | ||
| Official Class Key | — | 090-020-010 |
| Product identity | ||
| Official product category | Needle roller bearings | — |
| Official taxonomy path | /products/rolling-bearings/roller-bearings/needle-roller-bearings/drawn-cup-needle-roller-bearings | — |
| Structure group ID | BND_001 | — |
| Available from SKF | Yes | — |
| Remanufacturable | No | — |
| Properties | ||
| Bearing part | Bearing without inner ring | — |
| Number of rows | 1 | — |
| Outer ring type | Drawn cup with one closed end | — |
| Aligning feature | Without | — |
| Number of flanges, outer ring | 2 | — |
| Tolerance class | Normal | — |
| Material, bearing | Bearing steel | — |
| Coating | Without | — |
| Relubrication feature | Without | — |
| Indicative carbon footprint for new product | 0.26 kg CO 2 e | — |
| Technical Data | ||
| Fw | — | 45 mm |
| D | — | 52 mm |
| C | — | 20 mm |
| C3(Min.) | — | 17.3 mm |
| R(Min.) | — | 1 mm |
| Basic Load Ratings : Cr | — | 26.3 kN |
| Basic Load Ratings : C0R | — | 55.4 kN |
| Fatigue Load Limit : Cu | — | 8.80 kN |
| Limiting Speeds(Grease Lub.) | — | 4600 min-1 |
| Limiting Speeds(Oil Lub.) | — | 7000 min-1 |
| Mounting Inner Ring | — | JR40x45x20,5 |
| Mass(Refer.) | — | 0.079 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.