KET R8 / R8ZZ Inch Miniature Ball Bearing (1/2" x 1-1/8") - Maximum Heavy-Duty Precision Bearing

Product Description:

Core Selling Points

• Ultimate Radial Capacity: Precision engineered with a robust 28.575 mm outer diameter, delivering a massive 3930 N dynamic load rating and 2230 N static load rating for extreme high-stress applications.

• High-Speed Shock Resistance: Capable of reaching up to 29,000 RPM with oil lubrication and 24,000 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 inch-based engineering measurements combined with absolute maximum structural ruggedness.

• 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 R8 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 R8 model provides unparalleled structural integrity. It delivers true-to-design dimensional exactness with every production batch for clients operating in extreme industrial environments.

Exact Technical Specifications

• Brand: KET

• Model Variants: R8 (Open Type) / R8ZZ (Shielded Type)

• Outer Diameter (D): 28.575 mm

• Width / Thickness (B/B1): 6.350 mm (Open) / 7.938 mm (Shielded)

• Chamfer (r): 0.4 mm

• Basic Dynamic Load Rating (Cr): 3930 N

• Basic Static Load Rating (Cor): 2230 N

• Limiting Speed (Grease Lubrication): Up to 24,000 RPM

• Limiting Speed (Oil Lubrication): Up to 29,000 RPM

Primary Industrial Applications The KET Inch Miniature Series is globally trusted by precision engineers, particularly in North American and European markets. Featuring an exceptionally robust profile, the R8 bearing is specifically ideal for:

• Ultra-heavy-duty industrial micro motors, power tools, and high-load transmission equipment.

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

• High-stress mechanical equipment and precision scientific testing instruments enduring extreme operational stress.

Strategic Manufacturing Partner Qualifications

• Internationally Certified Quality Systems: We operate strictly under rigorous global quality management frameworks, proudly holding dual ISO9001 certifications [source: 4, 9] and the stringent automotive industry standard IATF16949 [source: 8].

• Recognized Engineering Innovation: Our continuous investment in engineering R&D is officially validated by our recognition as a High-Tech Enterprise [source: 5] and a Technology-Based SME in Zhejiang Province [source: 10].

• Global Material Safety Compliance: We exclusively utilize premium raw materials that meet strict international safety directives. Our products pass comprehensive third-party SGS laboratory testing for SVHC and RoHS compliance [source: 6, 7].

• Uncompromised Quality Control: 100% precision-tested utilizing state-of-the-art roundness instruments and automatic noise testing equipment prior to global shipment [source: 1].

Are You Reviewing Your Bearing Sourcing Costs? Let's Talk. Many engineering and procurement teams are currently looking to balance premium quality with better cost control. If you are reviewing your supplier options for the upcoming purchasing cycle, I would be happy to share how we’ve helped similar businesses reduce their sourcing costs without compromising on high-speed performance.

Reply to this email or reach out directly to discuss your specific requirements or to request free evaluation samples.

• Global Sales Representative: Ryan Fan

• Direct Email: ryan.fan@ketprecisionbearings.com

• WhatsApp: +86-18067291918

• Official Website: www.ketprecisionbearings.com