681 Miniature Bearing 1x3x1mm – Ultra Micro Precision Solution by NKMB
ザ 681 miniature bearing 1x3x1mm is one of the smallest deep groove ball bearings available in the micro bearing market. ザ S681 304 stainless steel open type bearing is specially designed for ultra-compact precision equipment requiring high speed, 低摩擦, and corrosion resistance.
As a professional micro bearing manufacturer, NKMB provides high-precision 681 miniature bearings with stable quality and global OEM supply capability.
681 Bearing Dimensions (1x3x1mm)
The standard dimensions of the 681 miniature bearing are:
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内径 (身分証明書): 1 ミリメートル
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外径 (外径): 3 ミリメートル
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幅 (Thickness): 1 ミリメートル
Model variations:
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681 – Chrome steel version
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S681 – 304 stainless steel version
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681 Open Type – Without shields or seals
The compact size of the 681 bearing 1x3x1mm makes it ideal for micro mechanical assemblies.
S681 304 Stainless Steel Bearing – Open Type Structure
材料: 304 ステンレススチール
ザ S681 stainless steel bearing offers:
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Excellent corrosion resistance
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Rust protection in humid environments
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Stable performance in precision devices
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Smooth surface finishing
Open Type Design Advantages
ザ 681 open type bearing 顔立ち:
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Lower friction
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Higher rotational speed
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Easier cleaning
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Reduced torque resistance
NKMB 681 / S681 Technical Specifications
| Item | Specification |
|---|---|
| Bearing Model | 681 / S681 |
| ボアサイズ | 1 ミリメートル |
| 外径 | 3 ミリメートル |
| 幅 | 1 ミリメートル |
| 材料 | 304 ステンレススチール |
| 種類 | Open |
| Precision Grade | P0 / P6 Available |
| Clearance | C0 / C2 Optional |
| Cage Material | ステンレススチール |
| Max Speed | まで 80,000 RPM |
| Operating Temperature | -20°C to +120°C |
| Noise Level | Low Noise Z1 / Z2 |
All data based on NKMB standard production testing.
Applications of 681 Miniature Bearing 1x3x1mm
ザ 681 miniature bearing 1x3x1mm is widely used in:
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Micro electric motors
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Medical equipment
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Dental handpieces
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Smart wearable devices
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Optical instruments
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Precision instruments
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Micro robotics
NKMB micro bearings are engineered for high-speed and ultra-compact mechanical systems.
Why Choose NKMB 681 ミニチュアベアリング?
✅ High Precision Manufacturing
Micro-level machining ensures accurate roundness and concentricity.
✅ Strict Quality Control
100% inspection before shipment.
✅ OEM & Custom Solutions
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Custom clearance
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Special grease (including food grade)
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カスタマイズされたパッケージ
✅ Stable Global Supply
Reliable exporter of 681 miniature bearings 1x3x1mm.







