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Introduction to NKMB 627ZZ Miniature Deep Groove Bearing
The 627ZZ miniature deep groove ball bearing (7x22x7mm) is a compact, high-precision bearing designed for applications requiring smooth rotation, low noise, and long service life in limited spaces. Manufactured by NKMB, the 627 series bearings are produced using advanced technology and strict quality control standards, ensuring stable and reliable performance for global customers.
NKMB offers both 627ZZ (metal shielded) and 627-2RS (rubber sealed) versions to meet different operating environment requirements.
Detailed Parameters of 627ZZ / 627-2RS Bearing (NKMB)
| Parameter | Specification |
|---|---|
| Bearing Model | 627ZZ / 627-2RS |
| Brand | NKMB |
| Bearing Type | Miniature Deep Groove Ball Bearing |
| Inner Diameter (ID) | 7 mm |
| Outer Diameter (OD) | 22 mm |
| Width | 7 mm |
| Shield / Seal Type | ZZ (Double Metal Shields) / 2RS (Rubber Seals) |
| Material | Chrome Steel (GCr15) |
| Ball Material | Hardened Steel Balls |
| Cage Material | Steel Cage |
| Lubrication | Pre-lubricated High-Speed Grease |
| Precision Grade | ABEC-1 / ABEC-3 (Optional) |
| Radial Clearance | C0 (Standard), C3 Optional |
| Max Speed (Grease) | Approx. 20,000 RPM |
| Operating Temperature | -20°C to +120°C |
| Noise Level | Low Noise |
| Weight | Approx. 9.2 g |
Key Features of NKMB 627ZZ / 627-2RS Bearings
1. High Precision & Low Friction
NKMB 627 bearings are precision-ground to ensure accurate dimensions, low vibration, and smooth high-speed rotation, ideal for precision applications.
2. Shielded & Sealed Options
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627ZZ: Double metal shields reduce dust entry while allowing higher rotational speeds
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627-2RS: Rubber seals provide superior sealing performance for dusty or humid environments
3. Compact Size with Reliable Load Capacity
Despite its miniature size, the 627 bearing supports moderate radial loads, making it suitable for continuous operation.
4. Long Service Life
Optimized heat treatment and surface finishing give NKMB bearings excellent wear resistance and durability.
Applications of NKMB 627 Miniature Deep Groove Bearings
The NKMB 627ZZ / 627-2RS bearings are widely used in:
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Miniature electric motors
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Cooling fans and blowers
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Robotics and automation systems
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Office automation equipment
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Medical devices
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Fitness equipment
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Precision instruments and tools
Why Choose NKMB Miniature Bearings?
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Stable and consistent manufacturing quality
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Strict inspection and testing standards
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OEM and customized bearing solutions
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Competitive factory-direct pricing
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Trusted NKMB brand in international markets
NKMB focuses on providing high-performance miniature bearing solutions for modern mechanical and electronic applications.
Conclusion
The 627ZZ – NKMB Miniature Deep Groove Ball Bearing 7x22x7mm offers an excellent balance of precision, durability, and compact design. With detailed technical parameters, low-noise operation, and flexible shield or seal options, it is an ideal choice for a wide range of miniature and high-speed applications.
For reliable miniature deep groove bearings, NKMB is a brand you can trust.
