





VXB
S6903-2RS Ceramic Bearing Si3N4 Premium ABEC-7 17x30x7 Bearings
UPC: 00193019074374
Type: Deep Groove Radial Ball Bearing
Balls: Ceramic Si3N4
Radial Clearance: C0
Cage: Stainless Steel
S6903-2RS Sealed Ball Bearing Premium ABEC-7 Quality with Si3N4 Ceramic Balls (Silicon Nitride) 17mm x 30mm x 7mm |
S6903-2RS Sealed Ball Bearing is double sealed, radial and deep groove ball bearing,bearing is made from stainless steel with Ceramic Balls (Si3N4) and Stainless steel cage,S6903-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,bearing is sealed and self lubricated,the quality is set to EMQ (Premium ABEC-7 quality) to ensure high speed,S6903-2RS bearing is lubricated with grease.
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VXB Category: Hybrid ceramic bearings
💡 What Does ABEC-7 Mean?
ABEC-7 is a high-precision rating from the Annular Bearing Engineers’ Committee (ABEC), indicating extremely tight manufacturing tolerances. These bearings provide ultra-smooth, low-friction performance and are often used in high-speed, high-accuracy applications.
ABEC-7 bearings are commonly found in precision instruments, aerospace equipment, high-end electric motors, and demanding industrial machinery. They offer exceptional performance but are typically more expensive due to the level of accuracy involved.
Very happy with the bearing, it fit my Campagnolo bottom bracket perfectly and it's better than the original because it is sealed on both sides. The original failed due to the lack of a seal on the inside edge. Thank you!
verry good
These bearings are excellent quality and fit was pefect in my Alchemy racing hub. Super upgrade to the stock bearings. Hub spins forever with these bearings installed.