Black bearing bearing 40 × 52 × 7 mm B5 6808-2RS / 61808-2RS UB-6808-B5

BLACKBEARING B5 6808-2RS Bearing – 40 × 52 × 7 mm

EAN: 3760290192072
Part Number: UB-6808-B5
Brand: BLACKBEARING
Type: Deep Groove Ball Bearing (2RS)

The UB-6808-B5 is a premium-quality deep groove ball bearing designed for cycling and precision mechanical applications. The 61808-2RS and 6808-2RS designations refer to the same bearing size. As part of the BLACKBEARING B5 series, it delivers excellent rolling performance, low friction, and long service life while providing effective protection against water, dust, and other contaminants.

The 6808-2RS size features a larger inner diameter and high load capacity, making it an ideal choice for bicycle applications where durability, stable operation, and long-term reliability are essential.

Key Features

• Premium BLACKBEARING B5 quality
• 6808-2RS / 61808-2RS standard bearing
• 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-ground raceways
• Steel cage
• Pre-filled with high-quality lubricant
• Long service life and reliable performance
• Reinforced 2RS seals for enhanced water and dust resistance

Technical Specifications

Applications

• Wheel hubs
• Bottom bracket systems
• Pedals
• Suspension pivots
• Derailleur pulleys
• Other precision rotating assemblies

In Practice

The UB-6808-B5 is an excellent choice for applications where higher load capacity, long service life, and reliable operation are essential. The double 2RS seals effectively protect the internal components from moisture and contamination while retaining lubricant inside the bearing. Precision manufacturing, high-quality SAE52100 steel components, and ABEC 5-grade balls ensure smooth, quiet, and durable operation even under demanding cycling conditions.