OS Metric Lip Shaft Seal 30 x 40 x 4 mm Rubber/Steel single-piece pack for linear slide unit and sealed ball bearing protection, ceramic-compatible OS30404 series

Metric 30 x 40 x 4 mm lip shaft seal, single-piece pack
✔️ 30 mm ID x 40 mm OD x 4 mm width; rubber lip, steel case, OS30404

This single-piece metric lip shaft seal protects shafts and sealed ball bearings in linear slide units, gearboxes, and motor housings. Works well with ceramic-bearing applications and standard metric shafts.

✅ 30 mm inside diameter (ID), 40 mm outside diameter (OD), 4 mm width
✅ Rubber lip with steel case for reliable sealing; OS30404 series
✅ Single-piece pack for one replacement seal; fits metric shafts
✅ Compatible with sealed ball bearing setups, linear slide units, and ceramic bearings

💡 What is a shaft lip seal used for in sealed ball bearing and linear slide unit applications? A shaft lip seal keeps lubricants in and dirt out, helping bearings and slides run longer. Short overview: - Prevents contamination and retains lubricant for sealed ball bearing longevity - Helps linear slide units maintain smooth motion and reduces wear - Works with rubber-on-steel designs and ceramic bearing upgrades