Ruth's sister 10pcs 624 4*13*5 mm internal power cable

Ten-piece bearing kit

This set contains ten carbon-steel 624 deep-groove ball bearings measuring 4 by 13 by 5 mm. The sealed Z and ZZ variants keep lubricant in and contaminants out for smooth rotation in small mechanisms. They suit hobbyists repairing fans, motors or 3D-printer idlers.

Sealed miniature bearings

The 5 mm width limits load capacity compared with wider series, so high-thrust or heavy-radial applications will need a larger bearing. The 4 mm bore fits only shafts of that exact diameter, ruling out larger motor spindles. Carbon steel lacks the corrosion resistance of stainless grades for wet or chemical environments.