Black bearing bearing 9 × 17 × 5 mm B5 689-2RS UB-689-B5

BLACKBEARING B5 689-2RS Bearing – 9 × 17 × 5 mm

EAN: 3760290191280
SKU: UB-689-B5
Brand: BLACKBEARING
Type: Deep Groove Ball Bearing (2RS)

The UB-689-B5 is a premium-quality deep groove ball bearing designed for cycling and precision mechanical applications. The 689-2RS bearing features dimensions of 9 × 17 × 5 mm, providing smooth operation, low friction, and reliable performance in a compact design.

The BLACKBEARING B5 series delivers excellent rolling efficiency, long service life, and effective protection against water, dust, and other contaminants. The reinforced 2RS seals help retain lubricant inside the bearing while preventing external impurities from entering.

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, ensuring reliable operation even under intensive cycling conditions.

Key Features

• Premium BLACKBEARING B5 quality
• 689-2RS 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
• Bottom bracket systems
• Pedals
• Suspension pivot points
• Derailleur pulleys
• Other precision rotating components

In Practice

The UB-689-B5 is an excellent choice for compact applications where smooth operation, durability, and precise performance are essential. The double 2RS sealing system effectively protects the internal components from water and contamination while keeping the lubricant inside the bearing.

Thanks to precision manufacturing, high-quality SAE52100 steel components, and ABEC 5 grade balls, the bearing provides smooth, quiet, and reliable performance even under demanding cycling conditions.