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Since 2010, Fujian Welink Bearing Technology Co., Ltd. has been a globally trusted leader in precision bearings, specializing in miniature deep-groove ball bearings. Our proprietary brand WELINK delivers premium quality and reliable performance rivaling international famous brands, with unbeatable cost-effectiveness that balances top-tier craftsmanship and competitive pricing. With three strategic R&D and production bases across Ningbo (Zhejiang), Ningde (Fujian), and Anhui, plus over 20,000㎡ advanced workshops, we ensure a comprehensive product range, stable supply, and rigorous quality control. Serving 50+ industries worldwide, Our precision bearings are extensively applied in:

All products

MR128-2RS Miniature Deep Groove Ball Bearing | Precision Sealed Micro Bearing | 8×12×3.5 mm

The MR128-2RS is a high-precision miniature ball bearing specifically developed for compact mechanical assemblies where internal clearances are tight and environmental protection is vital. Outfitted with dual contact rubber seals (2RS), this micro-bearing provides a superior barrier against fine dust and moisture while ensuring the internal lubricant remains stable during operation. With an 8mm bore, a 12mm outer diameter, and a slim 3.5mm width, it is the premier choice for RC racing components, small brushless motors, and precision dental tools requiring smooth, dependable rotation.

MR128-ZZ Miniature Deep Groove Ball Bearing | High-Speed Shielded Micro Bearing | 8×12×3.5 mm

The MR128-ZZ is a precision-engineered miniature ball bearing designed for high-velocity mechanical systems where low starting torque and minimal heat generation are essential. Featuring dual non-contact metal shields (ZZ), this micro-bearing provides reliable protection against larger debris while allowing the internal lubricant to operate at maximum efficiency. With an 8mm bore, a 12mm outer diameter, and a 3.5mm width, it serves as a critical high-performance component for cooling fans, high-frequency micro motors, and precision hobbyist electronics.

MR52 ZZ Ultra-Miniature Deep Groove Ball Bearing for Precision Micro Devices | 2×5×2.5 mm

The MR52-ZZ is a Premium Ultra-Miniature Deep Groove Ball Bearing engineered for high-precision and reliable performance in the most compact applications. Featuring double metal shields (ZZ) on both sides, this metric bearing provides effective protection against dust and particulate matter in confined spaces. With an ultra-small 2mm bore, it is an ideal, space-saving choice for micro motors, precision medical devices, tiny instrumentation, and miniature mechanisms where every cubic millimeter counts.

MR148-ZZ Deep Groove Ball Bearing For Compact Motors & Precision Mechanisms | 8×14×4 mm

The MR148-ZZ is a Robust Miniature Deep Groove Ball Bearing engineered for applications that require dependable performance with enhanced protection from contaminants. Featuring dual steel shields (ZZ) on both sides, this metric bearing provides a solid barrier against dust and airborne particles, helping to retain internal lubrication and promote smooth, extended service life. With an 8mm bore, it is well-suited for integration into small electromechanical systems, precision equipment, and motor assemblies where space efficiency and reliable sealing are key priorities.

MR137-ZZ Micro Deep Groove Ball Bearing For Precision Instruments & Small Mechanisms | 7×13×3 Mm

The MR137-ZZ is a Miniature Double-Shielded Deep Groove Ball Bearing engineered for reliable performance in compact, precision applications. Utilizing the fundamental deep groove design, this small-diameter bearing is capable of supporting radial loads and very light axial loads in either direction. With a 7 mm bore and integrated double metal shields (ZZ) for basic contamination protection, it is an essential component for sensitive instruments, small motors, precision drives, and other applications where space is limited and smooth, low-friction operation is critical.

MR126-ZZ Miniature Deep Groove Ball Bearing For Precision Mechanisms | 6×12×4 Mm

The MR126-ZZ is an Ultra-Compact Double-Shielded Deep Groove Ball Bearing engineered for reliable performance in space-constrained precision applications. Featuring the standard deep groove raceway design, this miniature bearing efficiently handles radial loads and minimal axial loads from both directions. With a 6 mm bore and built-in double metal shields (ZZ), it provides essential protection while maintaining low friction, making it an ideal component for small electric motors, sensitive instruments, micro-drives, and other compact devices where smooth, maintenance-free operation is critical.

MR125-ZZ Ultra-Miniature Deep Groove Ball Bearing For Sensitive Instruments | 5×12×4 Mm

The MR125-ZZ is a Double-Shielded Ultra-Miniature Deep Groove Ball Bearing engineered for precision and reliability in extremely space-limited applications. Utilizing the fundamental deep groove raceway, this micro-sized bearing is capable of supporting light radial loads and minimal axial loads from both directions. With a compact 5 mm bore and pre-installed double metal shields (ZZ) for protection, it is a critical component for sensitive instruments, micro-motors, optical devices, and other applications where minimal size, smooth operation, and contamination resistance are paramount.

MR117-2RS Miniature Sealed Deep Groove Ball Bearing For Precision Mechanisms | 7×11×2.5 Mm

The MR117-2RS is an Ultra-Miniature Deep Groove Ball Bearing designed for applications where space is extremely limited and reliable sealing against contaminants is essential. Featuring double rubber contact seals (2RS) on both sides, this bearing provides superior protection against dust, moisture, and fine debris while maintaining smooth rotational performance. With a 7 mm bore and a compact 11×2.5 mm cross-section, it is ideal for micro motors, small instruments, precision mechanisms, and devices operating in challenging environmental conditions.

MR105 Open-Type Miniature Deep Groove Ball Bearing For Electrical Instruments | 5×10×4 Mm

The MR105 is a Miniature Deep Groove Ball Bearing designed for high-precision applications in compact assemblies where minimal friction and smooth operation are essential. With an open design (no seals or shields), this bearing offers unobstructed performance, making it ideal for clean environments, high-speed mechanisms, and applications requiring frequent re-lubrication. Featuring a 5 mm bore and compact 10×4 mm dimensions, it delivers reliable radial and axial load support in tight spaces.

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