KET FR144 Inch Flange Bearing (Open/ZZ) | Miniature High-Speed Flanged Ball Bearing

Source premium KET FR144 / FR144ZZ miniature inch flange bearings direct from the manufacturer. Engineered for high-speed motors, drones, and precision instruments. Global B2B shipping available.

Product Overview

Upgrade your precision machinery with the KET FR144 Miniature Inch Flange Bearing. Manufactured by Ningbo Kexiang Bearing Technology Co., Ltd. under strict ISO9001 and IATF16949 quality management systems, this bearing delivers exceptional durability, ultra-low friction, and outstanding high-speed performance.

Designed specifically for compact applications requiring precise axial positioning, the FR144 series features a built-in flange on the outer ring. This eliminates the need for external retaining rings, streamlining your assembly process and reducing manufacturing costs. Available in both open (FR144) and shielded (FR144ZZ) configurations, it is fully optimized to protect against contaminants while retaining high-quality lubrication.

Key Features & Benefits

• Flanged Design: Ensures accurate alignment and secure seating in challenging mounting environments.

• High-Speed Performance: Capable of reaching up to 80,000 RPM with oil lubrication, making it ideal for high-RPM micro motors.

• Premium Material: Constructed from high-grade bearing steel for superior wear resistance and extended fatigue life.

• Low Noise & Vibration: Rigorously tested using advanced roundness instruments and automatic noise testing equipment (Z1-Z4 grades available) to guarantee smooth, quiet operation.

Technical Specifications

• Brand: KET

• Model: FR144 (Open) / FR144ZZ (Shielded)

• Inner Diameter (d): 3.175 mm

• Outer Diameter (D): 6.350 mm

• Flange Outer Diameter (D1): 7.518 mm

• Width (B - Open): 2.380 mm

• Width (B1 - Shielded): 2.779 mm

• Flange Width (C1 / C2): 0.584 mm (Open) / 0.787 mm (Shielded)

• Chamfer (r): 0.1 mm

• Basic Dynamic Load Rating (Cr): 283 N

• Basic Static Load Rating (Cor): 95 N

• Limiting Speed (Grease): 67,000 RPM

• Limiting Speed (Oil): 80,000 RPM

Ideal Applications

The KET FR144 is universally trusted across multiple high-tech industries:

• UAVs and Commercial Drones

• Precision Medical and Dental Instruments

• Telecommunication and Optical Equipment

• Brushless Motors and Robotics

• High-End RC Models and Haptic EDC Devices

Global Supply & B2B Wholesale

As a leading factory-direct supplier, KET Bearings provides robust supply chain management and reliable fulfillment for wholesale distributors and manufacturing hubs worldwide. Whether your production facilities are located in European industrial centers, the expanding Russian markets, or Central Asian manufacturing zones, we offer scalable bulk ordering, custom OEM/ODM packaging, and dedicated logistical support to keep your assembly lines moving seamlessly.

Contact our B2B sales team today to request a quote, access technical 3D CAD files, or discuss custom non-standard bearing modifications tailored to your specific project.