Black bearing bearing 3.18 × 9.53 × 3.97 mm B5 R2-2RS UB-R2-B5

BLACKBEARING B5 R2-2RS Bearing – 3.18 × 9.53 × 3.97 mm

EAN: 3760290190832
SKU: UB-R2-B5
Brand: BLACKBEARING
Type: Deep Groove Ball Bearing (2RS)

The UB-R2-B5 is a premium-quality deep groove ball bearing designed for cycling and precision mechanical applications. The R2-2RS designation refers to the bearing size: 3.18 × 9.53 × 3.97 mm. The BLACKBEARING B5 series provides smooth rolling performance, low friction, and reliable durability while offering effective protection against water, dust, and other contaminants.

The bearing is manufactured with SAE52100 chrome steel balls (ABEC 5), precision-machined steel rings with accurate raceways, a chrome-plated steel cage, reinforced 2RS seals, and premium-quality lubricant. These components ensure reliable operation and long service life even in demanding cycling conditions.

The reinforced 2RS seals effectively protect the internal bearing components from moisture and contamination while retaining the lubricant inside the bearing for smooth and consistent performance.

Key Features

• Premium BLACKBEARING B5 quality
• R2-2RS standard
• Double rubber seals (2RS)
• Low rolling resistance
• Effective protection against dust and moisture
• Precision manufacturing and assembly
• SAE52100 chrome steel balls (ABEC 5)
• SAE52100 chrome steel rings with precision raceways
• Chrome-plated steel cage
• Filled with high-quality lubricant
• Long service life and reliable operation
• Reinforced 2RS seals for enhanced water and dust resistance

Technical Specifications

Applications

• Wheel hubs
• Pedals
• Derailleur pulleys
• Small precision rotating parts
• E-bike components
• Other compact bicycle applications

In Practice

The UB-R2-B5 is an excellent choice for compact bicycle components where smooth operation, precise rotation, and reliable sealing are essential. Despite its small dimensions, it offers excellent durability and protection against external contaminants.

Precision manufacturing, high-quality SAE52100 steel components, and ABEC 5 grade balls ensure smooth, quiet, and reliable operation even under demanding cycling conditions.