The NSK 61801ZZ 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 shielded (ZZ), effective dust prevention while allowing grease replenishment variant. NSK Japan — precision bearing specialist, CNC spindles and high-speed bearings — 6 equivalent brands available under ISO designation 61801.
NSK 61801ZZ
Deep Groove Ball Bearings — 12×21×5 mm — ISO 61801
Technical Specifications
Full specifications for NSK 61801ZZ per OEM catalog.
* Tolerances per ISO. Specifications per OEM catalog.
Cross-Reference — Equivalent Codes
Same ISO 61801 — interchangeable dimensions.
| Brand | Part Number |
|---|---|
| NSK | 61801ZZ |
| fag | 61801-2Z |
| ntn | 61801ZZ |
| skf | 61801-2Z |
| zvl | 61801-2ZR |
| koyo | 61801ZZ |
| nachi | 61801ZZE |
| timken | 61801-2Z |
* C/C₀ may vary ±5% across manufacturers.
Compare 61801 Across Brands
Same interchangeable dimensions — different load ratings and pricing.
FAQ — NSK 61801ZZ
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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