The Yokomo BB-126N-2 kit contains narrow 6x12 metal ball bearings intended for compact RC applications. Built for heavier duty use to limit wear where space is restricted. The description states a supply of 2 pcs for ZM-415SH specifically; confirm the count for other uses.
Fitting advice: these bearings are for housings that accept narrow 6x12 types; apply correct press-fit technique and inspect shaft and hub clearance before finishing assembly. Light lubrication during service intervals helps sustain smooth operation.
Performance note: narrow 6x12 bearings like the BB-126N-2 can reduce rolling resistance in small hubs and drivetrain linkages, aiding smoother spin and predictable behavior under load.
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