KET FR4 / FR4ZZ Miniature Flanged Ball Bearing (1/4" x 5/8" x 0.196") | High-Speed Precision

Product Description:

Streamline Your Assembly with the KET FR4 Flanged Bearing Designed for precision and ease of installation, the KET FR4 Miniature Inch Flange Bearing eliminates the need for complex machined shoulders in your housing. The integrated outer-ring flange provides perfect axial positioning, making it the ideal solution for compact motors, sensitive instrumentation, and lightweight mechanical assemblies.

Available in both open (FR4) and double-shielded (FR4ZZ) configurations to protect against industrial contaminants while retaining premium factory lubrication.

Key Engineering Benefits:

• Simplified Mounting: The solid flange allows for simple slip or press-fitting into straight-bored housings, drastically reducing machining costs and assembly time.

• High-Speed Capability: Exceptionally low friction coefficient allows for continuous operation up to 38,000 RPM with grease, or 45,000 RPM with oil lubrication.

• Robust Load Handling: Despite its miniature footprint, the FR4 delivers a dynamic load rating of 1480 N, ensuring stable and reliable performance under stress.

• Strict Quality Assurance: Subjected to rigorous roundness, hardness, and automatic noise testing to guarantee smooth, vibration-free rotation.

Technical Specifications:

• System of Measurement: Inch

• Bore Diameter (d): 6.350 mm (0.250")

• Outer Diameter (D): 15.875 mm (0.625")

• Flange Diameter (D1): 17.526 mm (0.690")

• Overall Width (B): 4.978 mm (0.196")

• Flange Width (C): 1.067 mm (0.042")

• Dynamic Load Rating (Cr): 1480 N

• Static Load Rating (Cor): 615 N

• Max Speed (Grease): 38,000 RPM

• Material: Premium Bearing Steel (Chrome Steel)

• Closure Type: Open (FR4) or Metal Shields (FR4ZZ)

Ideal For: 3D Printers | RC Models & Hobbies | Micro Gearboxes | Automated Office Equipment | Precision Measuring Instruments

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.