3Racing 3RB-MR74-ZZ/2 4x7x2.5mm Shielded Bearing Upgrade  [3RB-MR74-ZZ/2]

3RACING Double Metal Shield Bearing 4 x 7 x 2.5 mm (2 pcs) - 3RB-MR74-ZZ/2
Price:
£1.19
Brand:
3Racing
Model:
3RB-MR74-ZZ/2
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Precision rolling from 3Racing 3RB-MR74-ZZ/2

Model tuners seeking consistent drivetrain behaviour will value the 3Racing 3RB-MR74-ZZ/2 double metal shield bearings. Measuring 4x7x2.5mm, these bearings cut friction and support smooth operation across typical RC powertrains.

Robust shielded construction

Manufactured by 3Racing, the metal shields act as a barrier to road grit and workshop dust, extending service intervals and keeping rotations smooth under normal running conditions.

Suitable for a wide range of assemblies

The standard sizing of these bearings makes them suitable for many wheel hubs, idler shafts and motor mounts, making them a useful spare to carry for trackside repairs.

How do these compare with rubber sealed bearings?

Metal shields offer good protection against larger debris and have lower drag than some rubber seals, but rubber-sealed bearings can offer better water exclusion in very wet conditions.

Is the internal lubrication sufficient for racing?

Factory lubrication is adequate for general use; competitive racers may choose to refresh or re-lube bearings with a race-grade oil during setup.

Will these resist salt or coastal spray?

The metal shields help versus plain bearings, but prolonged exposure to salt air can corrode components; rinse and dry bearings after coastal runs to prolong life.

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