For modelers wanting straightforward durability, the 3RACING Double Metal Shield Bearings 12x18x4mm (10 pcs) - 3RB-6701-ZZ/10 supply consistent rotation. These 12 x 18 x 4 mm bearings slot into many standard RC positions to smooth movement and cut rolling resistance.
The double metal shields protect the internal raceways from grit and dust while preserving free spin. This construction is a good balance of protection and accessibility for routine hobby upkeep.
Use these bearings in wheel hubs, small gearboxes, idler pulleys and other locations that accept 12 x 18 x 4 mm components. Always check bore and shaft sizes on your model to ensure a correct, secure fit.
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