G40 Loose Ceramic Ball 20.5mm Si3N4 Silicon Nitride High Precision Replacement Ball For Mechanical Bearings Seals And Spindle Assemblies Durable Ceramic Ball With Excellent Wear Resistance Low Friction And Long Service Life In Harsh Environments

Ceramic Ball 20.5mm Si3N4 G40 for Precision Bearings
✔️ Size 20.5 mm (0.81 in), Si3N4 ceramic, Grade G40, 1 ball

This is a single ceramic ball made from silicon nitride (Si3N4) designed for use in precision bearing assemblies. It’s a common spare or replacement part in high-speed spindles, robotic actuators, and other machinery that demand low friction and long wear life.

✅ Size: 20.5 mm diameter (0.81 in)
✅ Material: Si3N4 ceramic
✅ Grade: G40
✅ Quantity: 1 ball

💡 What is a ceramic ball used for in precision bearing systems? Here’s a handy overview:
- Used in bearing assemblies to reduce friction and wear in high-speed applications
- Si3N4 ceramic balls offer exceptional hardness, corrosion resistance, and thermal stability
- Common in sealed ball bearing units and spare parts kits for machines needing long life