The Koyo 618012RS is a small size deep groove ball bearings with ISO dimensions 12×21×5 mm. Bearings in the 12mm bore range are commonly used in small motors, computer fans, printers, medical devices (under 0.5kW range). This is an double sealed (2RS), maintenance-free lubrication, ideal for harsh environments variant. Koyo (JTEKT) Japan — OEM automotive bearings for Toyota, Honda, Japanese quality competitive pricing — 6 equivalent brands available under ISO designation 61801.
Koyo 618012RS
Deep Groove Ball Bearings — 12×21×5 mm — ISO 61801
Technical Specifications
Full specifications for Koyo 618012RS per OEM catalog.
* Tolerances per ISO. Specifications per OEM catalog.
Cross-Reference — Equivalent Codes
Same ISO 61801 — interchangeable dimensions.
| Brand | Part Number |
|---|---|
| Koyo | 618012RS |
| fag | 61801-2RSR |
| nsk | 61801DDU |
| ntn | 61801LLU |
| skf | 61801-2RS1 |
| zvl | 61801-2RSR |
| nachi | 618012NSLE |
| timken | 61801-2RS |
* C/C₀ may vary ±5% across manufacturers.
Compare 61801 Across Brands
Same interchangeable dimensions — different load ratings and pricing.
FAQ — Koyo 618012RS
Quick answers to common questions.
Common Applications
Deep Groove Ball Bearings with 12mm bore diameter are commonly used in small motors, computer fans, printers, medical devices (under 0.5kW range).
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