Ten Pack R8ZZ Ball Bearings, Double Shielded Pre Lubricated Chrome Steel GCr15, 1/2 Inch Inner Diameter By 1-1/8 Inch Outer Diameter By 5/16 Inch Width, Interchangeable With R8Z R8.2Z 77R8, Heavy Duty

Ten-Pack R8ZZ Ball Bearings for heavy duty RC and CNC use
✔️ 1/2 in ID × 1-1/8 in OD × 5/16 in width, chrome steel, 10-pack

These bearings are double-shielded, pre-lubricated ball bearings built from chrome steel (GCr15) for heavy-duty use. They excel in RC models, small CNC setups, printers, and other compact machinery that demand reliable motion with low friction.

✅ ID: 12.7 mm (1/2 in)
✅ OD: 28.575 mm (1-1/8 in)
✅ Width: 7.9375 mm (5/16 in)
✅ Material: Chrome steel GCr15, double shielded ZZ
✅ Tolerance: ABEC 1 (P0), high-speed and low-noise
✅ Pack: Ten bearings per pack; interchangeable with R8Z, R8.2Z, 77R8

💡 What is a ball bearing used for in small machinery?

They enable smooth rotation while supporting loads in tight spaces.

• 1/2 in bore bearings are handy for compact motors and hobby gear
• Sealed double shields guard against dust and keep lubrication in
• Pre-lubricated designs save setup time and reduce maintenance