2Pcs 638-2RS Deep Groove Ball Bearings 8x28x9mm ZV4 Level ABEC7 Precision

Product Details:

• Color: Black
• Material: Bearing Steel (Chrome Steel)
• Bearing Model: 638-2RS
• Inner Diameter: 8mm/0.31 Inch
• Outer Diameter: 28mm/1.10 Inch
• Thickness: 9mm/0.35 Inch
• Seal Type: Double Rubber Sealed
• Precision Rating: ABEC7
• Noise Level: ZV4
• Package Content: 2 Pcs x Ball Bearings

High Precision Fit: With the ABEC7 precision grade, providing a good fit for high-end sports equipment builders working on bearing installations, ensuring vibration-free operation
Quiet Operation: Thanks to the ZV4 noise rating standard, it brings a pure, interference-free running experience to precision equipment maintenance engineers installing high-speed rotating ball bearings, ensuring stable and reliable performance
Double Rubber Sealed: Equipped with dual rubber seals (2RS) on both sides, these bearings protect against dust, dirt, and moisture ingress while effectively retaining internal grease.
Durable & Low Friction: Crafted from bearing steel with a sturdy metal cage, the chrome steel construction offers excellent wear resistance and corrosion resistance, ensuring long-lasting durability and stable operation even under continuous rotation.