SFR 2-5 ZZ RICH 3,175x7,938x3,571

SFR2-5ZZ RICH Stainless Steel Flanged Miniature Deep Groove Ball Bearing – 3.175 x 7.938 x 3.571 mm

The SFR2-5ZZ RICH is a high-precision flanged miniature deep groove ball bearing made entirely of stainless steel, engineered by RICH in China to deliver dependable performance in extremely compact and corrosive environments. With a 3.175 mm inner diameter, 7.938 mm outer diameter, and a compact 3.571 mm width, this bearing is an ideal solution for high-precision, space-constrained applications.

Designed for longevity and efficiency, the SFR2-5ZZ features a corrosion-resistant stainless steel construction, making it suitable for harsh or humid environments such as medical devices, food processing machines, and miniaturized robotics. The integrated flange (D1: 9.119 mm) allows for accurate axial positioning within housings, simplifying installation and enhancing stability during operation.

Its CN (normal) radial clearance ensures smooth rotation under standard loads and speeds, while the steel cage maintains optimal ball separation for low-friction performance. The bearing includes double-sided metal shields (ZZ) to protect internal components from contaminants like dust and debris while retaining lubrication. The rolling element diameter (Dw) is 1.588 mm, optimized for durability in ultra-miniature systems.

Weighing just a fraction of a gram, this ultra-light yet durable bearing is perfect for high-precision tasks where every millimeter and milligram counts—such as in dental tools, optical devices, micro gearboxes, or compact electromechanical assemblies. When reliability, compactness, and corrosion resistance are essential, the SFR2-5ZZ RICH bearing delivers outstanding performance with minimal maintenance.

Key Specifications:

• Type: Flanged Miniature Deep Groove Ball Bearing
• Brand: RICH
• Model: SFR2-5ZZ RICH
• Material: Stainless Steel
• Bore Diameter (d): 3.175 mm
• Outer Diameter (D): 7.938 mm
• Width (B): 3.571 mm
• Flange Diameter (D1): 9.119 mm
• Rolling Element Diameter (Dw): 1.588 mm
• Cage Material: Steel
• Clearance: CN (normal)
• Sealing: Double-sided Metal Shields (ZZ)
• Weight: 0.001 kg
• Country of Origin: China

Key Advantages:

• Exceptional Corrosion Resistance: Full stainless steel construction ideal for wet or chemically aggressive environments.
• Integrated Flange: Ensures stable axial positioning in compact housings.
• Miniature Format: Perfect for ultra-compact, high-precision mechanical systems.
• Optimized Internal Clearance: CN tolerance provides smooth operation for general applications.
• Shielded for Protection: Metal shields (ZZ) keep out dust and help retain lubricant inside.
• Durable Steel Cage: Maintains ball spacing and reduces operational noise and friction.
• Made by RICH: High-quality Chinese engineering trusted for consistent performance and dimensional accuracy.