MR63ZZ Miniature Ball Bearings 3x6x2.5mm – 10 Pack
MR63ZZ Miniature Ball Bearings 3x6x2.5mm – 10 Pack
MR63ZZ Mini Ball Bearings – 10-Piece Pack | 3x6x2.5mm Bearing Steel
Get precision-grade performance in a compact package with these MR63ZZ Miniature Ball Bearings. Machined from high-quality bearing steel and double-shielded with metal covers (ZZ), this 10-piece set is ideal for hobbyists, engineers, and makers who need reliable, low-friction rotation in tight spaces.
Whether you're building scale models, RC cars, robotics, or small motorized assemblies, these ultra-compact bearings deliver smooth, consistent spin with minimal play. Their small 3mm bore, 6mm outer diameter, and 2.5mm thickness make them a perfect fit for precision shafts and miniature mechanisms.
Key Specifications
- Model: MR63ZZ
- Material: Bearing Steel
- Color: Silver
- Inner Diameter: 3mm
- Outer Diameter: 6mm
- Thickness: 2.5mm
- Shield Type: Double Metal Shield (ZZ)
- Quantity: 10 Pieces per Pack
- Country of Origin: Made in Mainland China
Why Choose These Bearings?
- 🔩 High-Speed Capable: Engineered for high-RPM applications — spins smoothly under load with minimal friction
- 🛡️ Double-Shielded (ZZ): Metal shields on both sides keep dust and debris out, extending service life
- 📏 Ultra-Compact Design: 3x6x2.5mm dimensions fit neatly into miniature assemblies and tight clearances
- 🔧 Versatile Use: Compatible with RC vehicles, 3D printers, drones, hobby models, small motors, and more
- 💰 Wholesale Value: 10-piece pack offers great value for prototyping, repairs, and bulk builds
Common Applications
- RC car and drone builds
- 3D printer axis and extruder assemblies
- Miniature electric motors
- Robotics and automation components
- Scale model mechanisms
- Fidget spinners and hobby gadgets
Package Contents
10 × MR63ZZ Mini Ball Bearings (3x6x2.5mm)
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Frequently Asked Questions
Q: What does "MR63ZZ" mean in bearing specifications?
A: The "MR63" denotes the bearing series with a 3mm inner diameter and 6mm outer diameter. The "ZZ" suffix indicates double metal shields on both sides of the bearing, which help protect the internal ball and raceway from dust, particles, and minor splashing, making them suitable for high-speed and general-purpose miniature applications.
Q: What types of projects are MR63ZZ bearings best suited for?
A: MR63ZZ miniature ball bearings are widely used in RC cars, drones, 3D printers, small electric motors, robotics, hobby models, and fidget spinners. Their ultra-compact 3x6x2.5mm dimensions make them ideal wherever a precision, low-friction rotating element is needed in a tight space.
Q: Can these bearings be lubricated after purchase?
A: While the ZZ metal shields are not easily removable (unlike rubber-sealed RS bearings), the bearings typically come pre-lubricated with grease. For most hobbyist and light-duty applications, no additional lubrication is required. If used in high-speed or high-temperature environments, a drop of light machine oil applied to the shield gap can help extend bearing life.
Q: How many bearings are included in this pack?
A: Each pack contains 10 × MR63ZZ miniature ball bearings, making it great value for prototyping, model building, or keeping spares on hand for repairs.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.