KET R133 / R133ZZS Inch Miniature Ball Bearing (2.380x4.762x1.588mm) - Ultra-Precision High-Speed Micro Bearing

Product Description:

Core Selling Points

• Extreme High-Speed Performance: Capable of reaching an extraordinary 95,000 RPM with oil lubrication (80,000 RPM with grease), engineered specifically for ultra-high-speed micro-mechanisms.

• Ultra-Micro Inch Dimensions: Precision crafted with a 2.380mm inner diameter and 4.762mm outer diameter, designed for the most space-constrained assemblies requiring exact inch specifications.

• 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.

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

Detailed Overview The KET R133 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 R133 model provides the ultimate balance of extreme miniaturization and incredible rotational speed, delivering true-to-design dimensional exactness with every production batch for clients utilizing inch-based engineering standards.

Exact Technical Specifications

• Brand: KET

• Model Variants: R133 (Open Type) / R133ZZS (Shielded Type)

• Inner Diameter (d): 2.380 mm

• Outer Diameter (D): 4.762 mm

• Width / Thickness (B/B1): 1.588 mm (Open) / 2.380 mm (Shielded)

• Chamfer (r): 0.1 mm

• Basic Dynamic Load Rating (Cr): 188 N

• Basic Static Load Rating (Cor): 60 N

• Limiting Speed (Grease Lubrication): Up to 80,000 RPM

• Limiting Speed (Oil Lubrication): Up to 95,000 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 an ultra-compact profile and extreme speed limit, the R133 bearing is specifically ideal for:

• High-speed dental drills, delicate surgical tools, and advanced medical equipment.

• Ultra-high-speed micro motors, precision cooling fans, and miniature robotic actuators.

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

• Platinum jewelry manufacturing equipment and precision scientific testing instruments.

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.