10 Pack 61801ZZ Ball Bearings 12x21x5mm Double Shielded Chrome Steel Precision Bearings For Industrial Machinery Equipment And DIY Projects Long Lasting Durability And Smooth Operation

What is a 61801ZZ double shielded bearing pack for?
✔️ 12x21x5 mm chrome steel, double shielded, pre-lubed, pack of 10

These 61801ZZ ball bearings measure 12x21x5 mm and come in a 10-pack. Constructed from durable chrome steel, they feature double shields to keep dust out and lubricant in, making them ready for use in industrial machinery, hobby CNC setups, RC cars, conveyors, and general precision rotation applications.

✅ Size: Bore 12 mm, OD 21 mm, width 5 mm
✅ Material: Chrome steel for durability and load handling
✅ Shields: Double shielded (ZZ) for dust protection
✅ Lubrication: Pre-lubed with grease for immediate operation
✅ Packaging: 10 bearings per pack, in one plastic tube
✅ Compatibility: Fits standard 61801-series components (61801-2Z/61801-ZZ)
✅ Applications: Ideal for industrial gear, hobby CNC, robotics, conveyors

💡 What is a sealed ball bearing used for in general machinery?

Sealed ball bearings protect the rolling elements from dust and moisture while keeping lubricant inside, which helps extend life and reduce maintenance.

• They support rotating shafts in equipment like conveyors, motors, and robotics
• They provide smooth rotation with low friction and good alignment
• Double shields cut down on contamination and lubricant loss, lowering upkeep