4mm Bore Bearing With 12mm White Plastic Tire 4x12x7mm Round Ball Bearing Assembly White Plastic Tire Coupled With Steel Ball Bearings For Precision Micro Machines And Hobby Projects Durable Smooth Rotation

This compact 4x12x7 mm bore bearing blends a steel ball with a white plastic tire. It's a handy choice for small hobby projects, RC models, robotics, 3D printers, and other tight-space assemblies requiring precise, smooth rotation.

✅ Bore: 4 mm
✅ Outer diameter: 12 mm
✅ Tire width: 7 mm
✅ Ball type: steel balls with white plastic tire
✅ Quantity: 1 bearing

💡 What is a 4 mm bore bearing used for in small hobby projects?

These handy bearings fit compact axles in micro assemblies.

• Ideal for micro-robots, 3D printers, and small conveyors
• Sealed ball bearing design keeps dirt out and lasts longer
• Ceramic ball options exist in other models for lower friction
• 4 mm bore fits narrow shafts in hobby kits