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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

6709-ZZ Thin Section Deep Groove Ball Bearing For Electromechanical Systems | 45×55×6 mm

The 6709-ZZ is a precision Thin Section Deep Groove Ball Bearing designed for applications where space is limited and weight reduction is critical. Featuring a double shielded design (ZZ) with pressed steel covers on both sides, it effectively retains grease and excludes light contamination while maintaining minimal rotational torque. With its ultra-slim 45x55x6 mm cross-section, this bearing is engineered for compact mechanical and electromechanical systems .

6710-2RS Thin Section Deep Groove Ball Bearing For Medical Devices & Automation Equipment | 50×62×6 mm

The 6710-2RS is a precision Thin Section Deep Groove Ball Bearing engineered for applications demanding minimal radial space and enhanced protection. Featuring a double contact rubber seal (2RS) on both sides, it provides superior exclusion of moisture, dust, and fine contaminants while retaining lubricant for extended maintenance-free operation. With its ultra-slim 50x62x6 mm cross-section, this bearing is ideal for compact industrial drives, medical devices, and automation equipment .

6710-ZZ Thin-Section Deep Groove Ball Bearing | Precision Space-Saving Solution | 50×62×6 mm

Engineered specifically for restricted-space environments, the 6710-ZZ is an ultra-thin section deep groove ball bearing that delivers uncompromising precision without unnecessary bulk. Equipped with dual non-contact metal shields (ZZ), this bearing effectively blocks particulate contamination while permanently retaining its high-quality factory lubrication. Featuring a large 50mm bore, a 62mm outer diameter, and a remarkably slim 6mm width, it is the ultimate solution for robotics, optical equipment, and industrial automation assemblies where weight reduction and tight radial clearances are critical.

6711-2RS Thin-Section Deep Groove Ball Bearing | Sealed Precision Performance | 55×68×7 mm

The 6711-2RS is a high-performance, extra-light metric bearing designed for applications where radial space is at a premium and environmental protection is a necessity. Featuring contact rubber seals (2RS) on both sides, this thin-section bearing provides a superior barrier against moisture, dust, and fine particulates compared to shielded versions. With a 55mm bore and a slim 7mm width, it offers a perfect balance of large-diameter shaft support and a minimalist mounting footprint, making it indispensable for modern automated machinery.

6711-ZZ High-Velocity Thin-Section Ball Bearing | Friction-Minimized Metric Series | 55×68×7 mm

The 6711-ZZ is a specialized thin-section radial bearing engineered for high-speed rotation where space efficiency is a primary design requirement. Featuring dual non-contact metal shields (ZZ), this bearing provides a robust barrier against dust and debris while maintaining the lowest possible rotational friction. With a 55mm bore diameter and a slim 7mm width, it is the premier choice for large-diameter shafting in robotics, optical instruments, and precision automation where thermal buildup must be kept to a minimum.

6700 ZZ Deep Groove Ball Bearing Moderate Loads for Industrial Drives | 10x30x9 mm

The 6700-ZZ is a Premium Deep Groove Ball Bearing engineered for robust and reliable performance in diverse mechanical applications. Featuring double metal shields (ZZ) on both sides, this metric bearing provides effective dual-side protection against dust and contaminants, ensuring long-lasting lubrication and smooth operation. With a 10mm bore, it is a versatile choice for industrial drives, power tools, pumps, and various machinery requiring a durable and general-purpose bearing solution.

6701-ZZ Thin-Section Deep Groove Ball Bearing For Small Fans | 12×18×4 Mm

The 6701-ZZ is a Thin-Section Double-Shielded Deep Groove Ball Bearing engineered for applications where radial space is extremely limited. Featuring the standard deep groove raceway design with a remarkably low cross-section, this bearing provides reliable radial load support in a compact form factor. With a 12 mm bore and only 4 mm width, and equipped with double metal shields (ZZ), it is an ideal solution for small fans, office machinery, precision instruments, and other compact assemblies where minimizing overall dimensions is critical, without compromising on protection or performance.

671 Miniature Deep Groove Ball Bearing | Ultra-Compact 1×2×1 Mm for Precision Instruments

The 671 is an extra-small miniature deep groove ball bearing from the metric 6700 series, designed for applications where space is at an absolute premium and precise rotational motion is required. With its minute 1mm bore and ultra-compact 1x2x1 mm dimensions, this micro-bearing is engineered for low-torque, high-speed performance. Despite its size, it retains the classic deep groove design to handle light radial and bidirectional axial loads, making it the ideal choice for miniature motors, dental handpieces, small gears, and precision instrumentation where smooth operation and reliability are critical.

671-2RS Miniature Deep Groove Ball Bearing | Sealed 1×2×1 mm for Compact Precision Equipment

The 671-2RS is a double-sealed miniature deep groove ball bearing engineered for applications demanding reliable protection in ultra-compact spaces. With its 1mm bore and 3mm outer diameter, this micro-bearing incorporates rubber contact seals to provide permanent lubrication retention and effective barrier against fine contaminants. The deep raceway geometry ensures smooth handling of light radial loads while the integrated sealing solution makes it particularly suitable for medical handpieces, precision instruments, and small electric motors where maintenance access is limited and operational reliability is paramount.

671-ZZ Miniature Deep Groove Ball Bearing | Double Shielded 1×2×1 mm for High-Speed Precision Assemblies

The 671-ZZ is a double shielded miniature deep groove ball bearing engineered for applications requiring high rotational speed combined with basic protection against particulate contamination. Featuring a 1mm bore and ultra-compact 3mm outer diameter, this micro-bearing incorporates non-contact metal shields that retain factory-applied lubricant while excluding larger airborne debris. The deep groove raceway geometry ensures stable handling of light radial loads, while the shield configuration maintains minimal frictional resistance, making it particularly suitable for high-speed dental tools, miniature spindle systems, and precision instrumentation where extended lubrication life and unrestricted rotation are equally important.

673-ZZ Miniature Deep Groove Ball Bearing For Precision Instruments & Miniature Drives | 3×6×2.5 mm

The 673-ZZ is a compact and lightweight miniature deep groove ball bearing engineered for precision applications where space is limited and reliability is paramount. Featuring double metal shields (ZZ) , this miniature bearing provides effective protection against dust ingress and ensures the retention of lubricating grease in confined assemblies. With a 3mm bore, 6mm outer diameter, and 2.5mm width, it is the ideal solution for small electric motors, dental handpieces, 3D printer components, and radio-controlled models where smooth, consistent operation under light loads is required.

6708-2RS Sealed Deep Groove Ball Bearing For Compact Applications | 40×50×6 Mm

The 6708-2RS is an Extra-Thin, Double Rubber-Sealed Deep Groove Ball Bearing designed for applications where space is at an absolute premium. Featuring a unique extremely slim cross-section (6 mm width) and a relatively large 40 mm bore, this bearing provides a compact rolling solution for mechanisms requiring low frictional torque and reliable sealing. Equipped with two contact rubber seals (2RS) , it provides superior protection against moisture and fine contaminants, ensuring long-term, maintenance-free operation in precision instruments and light-duty systems.

6709-2RS Sealed Deep Groove Ball Bearing For Light-Duty Precision Equipment | 45×55×6 Mm

The 6709-2RS is an Extra-Thin Section, Double Rubber-Sealed Deep Groove Ball Bearing engineered for applications requiring minimal weight and compact axial space. Featuring an ultra-narrow 6 mm cross-section paired with a 45 mm bore, this bearing delivers reliable rotational support where traditional bearings cannot fit. Equipped with two non-removable rubber contact seals (2RS) , it provides lifelong grease retention and effective exclusion of dust and moisture, ensuring maintenance-free operation in precision instruments and light industrial drives .

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