The Koyo 6084ZZ is a extra-large size deep groove ball bearings with ISO dimensions 420×620×90 mm. Bearings in the 420mm bore range are commonly used in HV motors, turbines, generators, boiler cooling fans (over 200kW range). This is an double shielded (ZZ), effective dust prevention while allowing grease replenishment variant. Koyo (JTEKT) Japan — OEM automotive bearings for Toyota, Honda, Japanese quality competitive pricing — 6 equivalent brands available under ISO designation 6084.
Koyo 6084ZZ
Deep Groove Ball Bearings — 420×620×90 mm — ISO 6084
Technical Specifications
Full specifications for Koyo 6084ZZ per OEM catalog.
* Tolerances per ISO. Specifications per OEM catalog.
Cross-Reference — Equivalent Codes
Same ISO 6084 — interchangeable dimensions.
| Brand | Part Number |
|---|---|
| Koyo | 6084ZZ |
| fag | 6084-2Z |
| nsk | 6084ZZ |
| ntn | 6084ZZ |
| skf | 6084-2Z |
| zvl | 6084-2ZR |
| nachi | 6084ZZE |
| timken | 6084-2Z |
* C/C₀ may vary ±5% across manufacturers.
Compare 6084 Across Brands
Same interchangeable dimensions — different load ratings and pricing.
| Brand | SKU | d×D×B | C (kN) | C₀ (kN) | |
|---|---|---|---|---|---|
| Koyo | 6084ZZ | 420×620×90 | 470.4 | 607.6 | Current |
| NACHI | 6084 | 420×620×90 | 475.2 | — | View |
| Timken | 6084 | 420×620×90 | 484.8 | — | View |
| FAG | 6084 | 420×620×90 | 489.6 | — | View |
| FAG | 6084-2RSR | 420×620×90 | 489.6 | — | View |
| FAG | 6084-2Z | 420×620×90 | 489.6 | — | View |
| Koyo | 6084 | 420×620×90 | 470.4 | — | View |
| Koyo | 60842RS | 420×620×90 | 470.4 | — | View |
| NACHI | 60842NSLE | 420×620×90 | 475.2 | — | View |
FAQ — Koyo 6084ZZ
Quick answers to common questions.
Common Applications
Deep Groove Ball Bearings with 420mm bore diameter are commonly used in HV motors, turbines, generators, boiler cooling fans (over 200kW range).
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