KET R2A / R2AZZ Inch Miniature Ball Bearing (1/8" x 1/2") - Heavy-Duty Precision Micro Bearing

Product Description:

Core Selling Points

• Maximum Heavy-Duty Capacity: Precision engineered with a standard 3.175mm (1/8") inner diameter and an extra-thick 12.700mm (1/2") outer diameter, delivering a massive 640 N dynamic load rating for the most extreme high-stress micro-applications.

• High-Speed Stability: Capable of reaching up to 63,000 RPM with oil lubrication and 53,000 RPM with grease, ensuring flawless operational stability under severe radial and axial shock loads.

• Exact Inch Specifications: Meticulously designed for North American and global assemblies requiring strict 1/8" inch-based engineering measurements for seamless mechanical integration.

• 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 R2A series deep groove ball bearing is a premium ultra-precision component belonging to our specialized Inch Miniature Series. Established in 2008 in Ningbo, Zhejiang Province, our highly automated manufacturing facility operates under the internationally registered trademark "KET," supplying world-class bearings to global OEM markets. The R2A model features an extra-thick cross-section, providing the ultimate balance of compact shaft sizing and unparalleled structural integrity. It delivers true-to-design dimensional exactness with every production batch for clients utilizing heavy-duty inch-based engineering standards.

Exact Technical Specifications

• Brand: KET

• Model Variants: R2A (Open Type) / R2AZZ (Shielded Type)

• Inner Diameter (d): 3.175 mm (1/8 Inch)

• Outer Diameter (D): 12.700 mm (1/2 Inch)

• Width / Thickness (B/B1): 4.366 mm (Open) / 4.366 mm (Shielded)

• Chamfer (r): 0.3 mm

• Basic Dynamic Load Rating (Cr): 640 N

• Basic Static Load Rating (Cor): 225 N

• Limiting Speed (Grease Lubrication): Up to 53,000 RPM

• Limiting Speed (Oil Lubrication): Up to 63,000 RPM

Primary Industrial Applications The KET Inch Miniature Series is highly versatile and globally trusted by precision engineers, particularly in North American and European markets. Featuring the most robust profile in its 1/8" bore class, the R2A bearing is specifically ideal for:

• Heavy-duty micro motors, high-load industrial cooling fans, and large-scale robotic actuators.

• High-stress medical equipment, robust dental drills, and delicate yet high-load surgical tools.

• Heavy-lift commercial UAVs (Drones), large RC models, and aerospace micro-mechanisms requiring maximum radial stability.

• Platinum jewelry manufacturing equipment and precision scientific testing instruments enduring high mechanical stress

Strategic Manufacturing Partner Qualifications

• Uncompromised Quality Control: 100% precision-tested utilizing state-of-the-art roundness instruments and automatic noise testing equipment prior to global shipment.

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

Contact Us for Global Wholesale & Bulk Purchasing

Secure your mechanical supply chain with uncompromising engineering quality, true-to-design exactness, 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.