KET R166 / R166ZZ Inch Miniature Ball Bearing (3/16" x 3/8") - High-Load Precision Micro Bearing

Product Description:

Core Selling Points

• Exact Inch Specifications: Precision engineered with a 4.762mm (3/16") inner diameter and 9.525mm (3/8") outer diameter, specifically designed for seamless integration into North American and global inch-based mechanical assemblies [source: 1].

• Enhanced Load Capacity: Delivers a highly robust 710 N basic dynamic load rating and 270 N static load rating, providing exceptional durability for demanding high-stress micro-applications [source: 1].

• High-Speed Stability: Capable of reaching up to 60,000 RPM with oil lubrication and 50,000 RPM with grease, ensuring flawless operational stability under heavy radial loads [source: 1].

• 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 [source: 1].

Detailed Overview The KET R166 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 [source: 1]. The R166 model provides 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 [source: 1]

• Model Variants: R166 (Open Type) / R166ZZ (Shielded Type) [source: 1]

• Inner Diameter (d): 4.762 mm (3/16 Inch) [source: 1]

• Outer Diameter (D): 9.525 mm (3/8 Inch) [source: 1]

• Width / Thickness (B/B1): 3.175 mm (Open) / 3.175 mm (Shielded) [source: 1]

• Chamfer (r): 0.1 mm [source: 1]

• Basic Dynamic Load Rating (Cr): 710 N [source: 1]

• Basic Static Load Rating (Cor): 270 N [source: 1]

• Limiting Speed (Grease Lubrication): Up to 50,000 RPM [source: 1]

• Limiting Speed (Oil Lubrication): Up to 60,000 RPM [source: 1]

Primary Industrial Applications The KET Inch Miniature Series is highly versatile and trusted by global precision engineers, particularly in North American and European markets [source: 1]. Featuring a robust profile for its 3/16" bore class, the R166 bearing is specifically ideal for:

• Heavy-duty micro motors, high-load industrial cooling fans, and large-scale robotic actuators [source: 1].

• Remote control UAVs (Drones), large RC models, and aerospace micro-mechanisms requiring extra radial stability [source: 1].

• Advanced medical equipment, delicate surgical tools, and high-stress dental drills [source: 1].

• Platinum jewelry manufacturing equipment and precision scientific testing instruments enduring high mechanical stress [source: 1].

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.