V Groove Ball Bearing Set 20 Pcs Miniature Steel V Pulley Bearings 3x12x4mm for Rail Track Linear Motion Systems Carbon Steel Build with Double Shield Seals for Smooth Quiet Operation and Long Life

20-Pack V-Groove Ball Bearing Set for Rail Motion
✔️ 20 pcs V-groove bearings, 3x12x4 mm for rail guides

These carbon steel V groove bearings are built for compact rail and linear motion tasks. Packed as a 20-piece set, they’re commonly used on miniature machines, track guides, and precise automation systems.

✅ Carbon steel construction provides durability for long life
✅ 3x12x4 mm size fits compact rails and V-groove tracks
✅ Double shield seals help keep lubricant in and contaminants out
✅ 1.4 mm deep V groove enables smooth riding on rails

💡 What is a V groove ball bearing used for in rail and linear motion systems? This handy piece helps guide movement along tracks with precision. - Supports smooth, quiet operation on small rail setups - Keeps lubricant in with double shields for longer life - Works with 3x12x4 mm V groove rails and tracks