604-2RS Full Ceramic Ball Bearings 4x12x4mm ZrO2 Miniature Skate Bearings Pack of 30 Wholesale, High-Grade Ceramic Bearings With PTFE Cage For Low Friction, Wear-Resistant Performance In Precision Applications And Hobby Projects
✔️ 30 bearings: 4x12x4 mm, ceramic ZrO2, PTFE cage, 2RS
These full ceramic 604-2RS miniature bearings use zirconia ceramic balls and races for exceptional wear resistance and corrosion resistance in tight spaces. They’re a solid fit for skate projects, precision hobby gear, and light industrial setups where metal bearings struggle.
✅ Type: Full Ceramic Ball Bearing 604-2RS
✅ Inner/Outer: 4x12x4 mm (ID 4 mm, OD 12 mm, W 4)
✅ Materials: Zirconia ceramic balls and races; PTFE cage
✅ Seals: 2RS sealed, shields against dirt and moisture
✅ Pack: 30 bearings in one wholesale 30-pack
💡 What is a ceramic ball bearing used for? Ceramic bearings are handy in precision applications where metal bearings wear or corrode quickly. - High-speed operation with low friction in robotics and hobby gear - Corrosion resistance in wet or humid environments - Lightweight, non-magnetic performance for sensitive equipment