Cross-brand designation analysis
COMPARE / VERIFY
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.
Dimensions verified
“604” across 3 loaded brands
At least two brands share the same bore, outside diameter and width. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | SKF604-2Z4 × 12 × 4 mm | NSK6044 × 12 × 4 mm | KOYO6044 × 12 × 4 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | NSK | KOYO |
| Designation | 604-2Z | 604 | 604 |
| Product family | Deep groove ball bearings | Single row deep groove ball bearings | Extra-small, miniature ball bearings / Standard type / Open |
| Detailed type | Deep groove ball bearing with seals or shields | Deep groove ball bearings | Deep groove ball bearings |
| Bore diameterd | 4 mm | 4 mm | 4 mm |
| Outside diameterD | 12 mm | 12 mm | 12 mm |
| WidthB | 4 mm | 4 mm | 4 mm |
| Basic dynamic load ratingC | 0.806 kN | 1.05 kN | 1.2 kN |
| Basic static load ratingC0 | 0.28 kN | 0.345 kN | 0.35 kN |
| Fatigue load limitPu | 0.012 kN | — | 0.009 kN |
| Reference speednref | 120000 r/min | — | — |
| Limiting speednG | 60000 r/min | — | 53000 r/min |
| Mass≈m | 0.0022 kg | 0.00225 kg | 0.002 kg |
| Precision class | Normal | — | — |
| Internal clearance | CN | — | — |
| Sealing | Shield on both sides | Open | Open |
| Cage | Sheet metal | — | — |
| Bearing material | Bearing steel | — | — |
| Lubricant | Grease | — | — |
| Boundary dimensions | |||
| Bearing width (open)B | — | 4 mm | — |
| Minimum bearing chamferr min. | — | 0.2 mm | — |
| Classification | |||
| Official Category Path | — | — | Deep groove ball bearings - Extra-small, miniature ball bearings - Standard type - Open |
| Official Classification 1 | — | — | Deep groove ball bearings / Extra-small, miniature ball bearings / Standard type / Open |
| Construction | |||
| Catalogue closure construction | — | Open | — |
| Engineering — Abutment dimensions | |||
| Diameter of shaft abutmentd a | max. 6 mm | — | — |
| Diameter of housing abutmentD a | max. 10.6 mm | — | — |
| Radius of shaft or housing filletr a | max. 0.2 mm | — | — |
| Engineering — Calculation data | |||
| Minimum load factork r | 0.03 | — | — |
| Calculation factorf 0 | 10 | — | — |
| Engineering — Dimensions | |||
| Deviation limits of mid-range bore diametert Δdmp | -0.008 to 0 mm | — | — |
| Deviation limits of mid-range outside diametert ΔDmp | -0.008 to 0 mm | — | — |
| Deviation limits of ring widtht ΔBs | -0.12 to 0 mm | — | — |
| Shoulder diameterd 1 | ≈ 6.1 mm | — | — |
| Recess diameterD 2 | ≈ 9.8 mm | — | — |
| Chamfer dimensionr 1,2 | min. 0.2 mm | — | — |
| ISO tolerance class for dimensions | Normal | — | — |
| Engineering — Tolerances of run-out | |||
| Range of section height at inner ring of assembled bearingt Kia | 10 µm | — | — |
| Range of section height at outer ring of assembled bearingt Kea | 15 µm | — | — |
| ISO tolerance class for geometrical tolerances | Normal | — | — |
| Load ratings | |||
| Basic dynamic radial load ratingCr | — | 1050 N | — |
| Basic static radial load ratingC0r | — | 345 N | — |
| Logistics | |||
| Product net weight | 0.0022 kg | — | — |
| eClass code | 23-05-08-01 | — | — |
| UNSPSC code | 31171504 | — | — |
| Lubrication-qualified speed | |||
| Limiting speed with grease | — | 48000 r/min | — |
| Limiting speed with oil (open) | — | 56000 r/min | — |
| Manufacturer Identity | |||
| Official Class Key | — | — | 010-020-010 |
| Mounting dimensions | |||
| Minimum shaft shoulder diameter (open)da min. | — | 5.6 mm | — |
| Maximum adjacent fillet radiusra max. | — | 0.2 mm | — |
| Maximum housing shoulder diameter (open)Da max. | — | 10.4 mm | — |
| Product identity | |||
| Official product category | Deep groove ball bearings | — | — |
| Official taxonomy path | /products/rolling-bearings/ball-bearings/deep-groove-ball-bearings | — | — |
| Structure group ID | BB1_001_101 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Properties | |||
| Filling slots | Without | — | — |
| Number of rows | 1 | — | — |
| Locating feature, bearing outer ring | Without | — | — |
| Bore type | Cylindrical | — | — |
| Matched arrangement | No | — | — |
| Radial internal clearance | CN | — | — |
| Material, bearing | Bearing steel | — | — |
| Coating | Without | — | — |
| Sealing type | Non-contact | — | — |
| Relubrication feature | Without | — | — |
| Indicative carbon footprint for new product | 0.008 kg CO 2 e | — | — |
| Reference mass | |||
| Approximate catalogue mass (open) | — | 2.25 g | — |
| Technical Data | |||
| d | — | — | 12 mm |
| B | — | — | 4 mm |
| R(Min.) | — | — | 0.2 mm |
| Basic Load Ratings : Cr | — | — | 1.20 kN |
| Basic Load Ratings : C0R | — | — | 0.35 kN |
| Fatigue Load Limit : Cu | — | — | 0.009 kN |
| Factor : F0 | — | — | 12.4 |
| Limiting Speeds(Grease Lub.) | — | — | 53000 min-1 |
| Limiting Speeds(Oil Lub.) | — | — | 63000 min-1 |
| Da(Min.) | — | — | 5.6 mm |
| Da(Max.) | — | — | 10.4 mm |
| Ra(Max.) | — | — | 0.2 mm |
| Mass(Refer.) | — | — | 2.1 g |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.