KET MR52 / MR52ZZ Metric Miniature Ball Bearing (2x5x2mm) - Ultra-Precision High-Speed Micro Bearing

Product Description:

Core Selling Points

• Ultra-Micro Dimensions: Precision engineered with a 2mm inner diameter and 5mm outer diameter for extremely space-constrained mechanical assemblies.

• High-Speed Performance: Capable of reaching up to 100,000 RPM with oil lubrication and 85,000 RPM with grease, ensuring flawless stability in high-speed micro-motors.

• Reliable Load Capacity: Delivers a solid 169 N basic dynamic load rating and 50 N static load rating despite its miniature footprint.

• Factory-Direct Supply: Manufactured by Ningbo Kexiang Bearing Technology Co., Ltd. with a robust annual capacity of 100 million sets, securing highly competitive B2B wholesale pricing for global procurement.

Detailed Overview The KET MR52 series deep groove ball bearing is an ultra-precision component designed strictly for advanced, high-speed miniature mechanical systems. Established in 2008 in Ningbo, Zhejiang Province, our highly automated manufacturing facility operates under the internationally registered trademark "KET," supplying world-class metric miniature bearings to global OEM markets. The MR52 model provides an optimal balance of extreme miniaturization and structural integrity, delivering true-to-design dimensional exactness with every production batch.

Exact Technical Specifications

• Brand: KET

• Model Variants: MR52 (Open Type) / MR52zz (Shielded Type)

• Inner Diameter (d): 2 mm

• Outer Diameter (D): 5 mm

• Width / Thickness (B/B1): 2 mm (Open) / 2.5 mm (Shielded)

• Chamfer (r): 0.1 mm

• Basic Dynamic Load Rating (Cr): 169 N

• Basic Static Load Rating (Cor): 50 N

• Limiting Speed (Grease Lubrication): Up to 85,000 RPM

• Limiting Speed (Oil Lubrication): Up to 100,000 RPM

Primary Industrial Applications The KET 1-3mm inner diameter ultra-miniature series is highly versatile and trusted by global precision engineers. Featuring a highly compact profile, the MR52 metric bearing is specifically ideal for:

• High-speed micro motors, compact cooling fans, and miniature robotic actuators.

• Remote control UAVs (Drones) and aerospace micro-mechanisms.

• Advanced medical equipment and high-speed dental drills.

• Platinum jewelry manufacturing equipment and precision testing instruments.

Why Choose KET Bearings as Your Strategic Manufacturing Partner?

• World-Class Manufacturing Facility: Located at No.555 Fengshou Road, Jiaochuan Street, Zhenhai District, Ningbo, Zhejiang, China, our advanced factory employs state-of-the-art testing equipment—including automatic noise tests and roundness instruments—to guarantee 100% precision and defect-free compliance.

• Internationally Certified Quality Systems: We operate strictly under rigorous global quality management frameworks. We prioritize complete transparency with our B2B enterprise partners and proudly provide our official certifications upon request.

• Recognized Engineering Innovation: Our continuous investment in engineering R&D is validated by our official recognition as a High-Tech Enterprise and a Technology-Based SME in Zhejiang Province.

• Global Material Safety & Environmental Compliance: We exclusively utilize premium raw materials that meet strict international safety directives, fully backed by our comprehensive third-party SGS laboratory testing reports.

• OEM & Customization Capabilities: Beyond our standard metric catalog, our specialized R&D team is fully equipped to design, engineer, and customize non-standard precision bearings tailored exactly to your unique project requirements.

Contact Us for Global Wholesale & Bulk Purchasing

Secure your mechanical supply chain with uncompromising engineering quality, reliable delivery schedules, and competitive factory-direct pricing. Contact our international business development department today for B2B quotes, comprehensive technical datasheets, or to request evaluation samples.