W637/4X-2z & W638/4X-2RS1 High-Speed Stable Deep Groove Ball Bearings

<h2>Basic Info.</h2> <table border="1" class="wp-block-table"> <tr><th>Inner Diameter</th><td>4 mm</td></tr> <tr><th>Outer Diameter</th><td>10 mm</td></tr> <tr><th>Thickness</th><td>4 mm</td></tr> <tr><th>Model</th><td>W637/4X-2Z, W638/4R-2Z, W638/4X-2RS1</td></tr> <tr><th>Lubrication</th><td>Grease or Oil</td></tr> <tr><th>Origin</th><td>China</td></tr> </table> <h2>Introduction</h2> High-performance miniature ball bearings with rich stock, 100% on-time delivery, and OEM/ODM support. Designed for precision applications requiring low vibration (Z1V1–Z3V3) and reliable grease/oil lubrication. Certified with HS Code 8482102000.

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