Koyo
12
12 × 21 × 5 mm
Load C
1.5 kN
Speed
36,000
Weight
0.006 kg

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.

KoyoDeep Groove Ball BearingsPre-Order 3–5 Days

Koyo 618012RS

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)1.5 kN
Static Load Rating (C₀)0.9 kN
Limiting Speed (grease)36,000 rpm
Mass0.006 kg
Seal TypeDouble Sealed
ClearanceCN
Precision ClassP0
Genuine Koyo2–4h delivery in cityFree technical support

Technical Specifications

Full specifications for Koyo 618012RS per OEM catalog.

Bore Diameter (d)12 mm
Outside Diameter (D)21 mm
Width (B)5 mm
Dynamic Load Rating (C)1.5 kN
Static Load Rating (C₀)0.9 kN
Limiting Speed (grease)36,000 rpm
Mass0.006 kg
Seal TypeDouble Sealed
ClearanceCN
Precision ClassP0

* Tolerances per ISO. Specifications per OEM catalog.

Cross-Reference — Equivalent Codes

Same ISO 61801 — interchangeable dimensions.

BrandPart Number
Koyo618012RS
fag61801-2RSR
nsk61801DDU
ntn61801LLU
skf61801-2RS1
zvl61801-2RSR
nachi618012NSLE
timken61801-2RS

* 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)
Koyo618012RS12×21×51.50.9Current
FAG6180112×21×51.6View
FAG61801-2RSR12×21×51.6View
FAG61801-2Z12×21×51.6View
Koyo6180112×21×51.5View
Koyo61801ZZ12×21×51.5View
NACHI6180112×21×51.6View
NACHI618012NSLE12×21×51.6View
NACHI61801ZZE12×21×51.6View

FAQ — Koyo 618012RS

Quick answers to common questions.

Koyo 618012RS 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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Koyo 618012RS
12×21×5 mm
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