3RACING 3RB-MR84-2RS/2 Sealed Ball Bearings 4x8x3mm Pair for RC  [3RB-MR84-2RS/2]

3RACING Double Rubber Seals Bearing 4 x 8 x 3 mm (2 pcs) - 3RB-MR84-2RS/2
Price:
NZD$2.77
Brand:
3Racing
Model:
3RB-MR84-2RS/2
Condition:
Brand New
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Compact bearings built for RC duty

For routine upkeep or modest performance upgrades, the 3RACING Double Rubber Seals Bearing at 4 x 8 x 3 mm is a practical choice. These two-piece bearings provide smoother operation for wheels, driveshafts, and small gearboxes without complicated maintenance.

Why the double rubber seal matters

Double rubber seals limit the entry of dirt and moisture, which helps bearings keep turning cleanly over time. This sealing is particularly helpful when you run on grass, gravel or beachside surfaces where airborne grit can accelerate wear.

Simple installation and upkeep

Before fitting, make sure the bearing is clean and free from grit. Press them in squarely using a soft tool to protect the seals, and inspect periodically for signs of wear. Clean and relube as needed to extend service life.

Will these fit standard 4x8x3mm housings?

Yes. They match standard 4x8x3mm internal bores and are commonly used in small hubs and gearbox applications.

Do the seals prevent all water ingress?

Seals reduce water and dust entry but are not a substitute for full waterproofing. Avoid full immersion to preserve bearing life.

Are these suitable for high RPM applications?

They handle moderate RPM common in small scale RC. For very high speed spindles, check bearing spec and consider performance-grade alternatives.

How should I press them in without damage?

Use a socket or drift that contacts the outer race and apply steady pressure. Avoid hitting the inner race or seals directly.

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