NSK
12
12 × 21 × 5 mm
Load C
1.6 kN
Speed
36,000
Weight
0.006 kg

The NSK 61801 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 open type, requires periodic lubrication, suitable for clean environments variant. NSK Japan — precision bearing specialist, CNC spindles and high-speed bearings — 6 equivalent brands available under ISO designation 61801.

NSKDeep Groove Ball BearingsPre-Order 3–5 Days

NSK 61801

Deep Groove Ball Bearings12×21×5 mm — ISO 61801

Dimensions
Bore Diameter (d)12 mm
Outside Diameter (D)21 mm
Width (B)5 mm
Dynamic Load Rating (C)1.6 kN
Static Load Rating (C₀)0.9 kN
Limiting Speed (grease)36,000 rpm
Mass0.006 kg
Seal TypeOpen
ClearanceCN
Precision ClassP0
Genuine NSK2–4h delivery in cityFree technical support

Technical Specifications

Full specifications for NSK 61801 per OEM catalog.

Bore Diameter (d)12 mm
Outside Diameter (D)21 mm
Width (B)5 mm
Dynamic Load Rating (C)1.6 kN
Static Load Rating (C₀)0.9 kN
Limiting Speed (grease)36,000 rpm
Mass0.006 kg
Seal TypeOpen
ClearanceCN
Precision ClassP0

* Tolerances per ISO. Specifications per OEM catalog.

Cross-Reference — Equivalent Codes

Same ISO 61801 — interchangeable dimensions.

BrandPart Number
NSK61801
fag61801
ntn61801
skf61801
zvl61801
koyo61801
nachi61801
timken61801

* C/C₀ may vary ±5% across manufacturers.

Compare 61801 Across Brands

Same interchangeable dimensions — different load ratings and pricing.

BrandSKUd×D×BC (kN)C₀ (kN)
NSK6180112×21×51.60.9Current
FAG6180112×21×51.6View
FAG61801-2RSR12×21×51.6View
FAG61801-2Z12×21×51.6View
Koyo6180112×21×51.5View
Koyo618012RS12×21×51.5View
Koyo61801ZZ12×21×51.5View
NACHI6180112×21×51.6View
NACHI618012NSLE12×21×51.6View

FAQ — NSK 61801

Quick answers to common questions.

NSK 61801 có kích thước d×D×B = 12×21×5 mm theo tiêu chuẩn ISO. Đường kính trong d = 12 mm, đường kính ngoài D = 21 mm, chiều rộng B = 5 mm.

Common Applications

Office equipmentElectronics

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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NSK 61801
12×21×5 mm
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