10-Pack MR63ZZ Mini Ball Bearings 3×6×2.5mm Bearing Steel
10-Pack MR63ZZ Mini Ball Bearings 3×6×2.5mm Bearing Steel
10-Pack MR63ZZ Mini Ball Bearings — 3×6×2.5mm Bearing Steel
Keep your precision machinery, RC models, 3D printers, and hobby projects spinning smoothly with these MR63ZZ miniature ball bearings. Each bearing is crafted from high-grade bearing steel and features double metal shields (ZZ) to keep out dust and debris, ensuring long-lasting, low-friction performance in compact applications.
Key Specifications
- Model: MR63ZZ
- Material: Bearing Steel
- Color: Silver
- Outer Diameter: 6mm
- Inner Diameter (Bore): 3mm
- Thickness / Width: 2.5mm
- Shield Type: Double Metal Shield (ZZ)
- Pack Quantity: 10 pieces
Why Choose These Mini Bearings?
- Ultra-Compact Design: At just 6mm OD and 3mm bore, these bearings fit in the tightest spaces where standard bearings simply won't.
- High-Grade Bearing Steel: Provides excellent hardness, wear resistance, and consistent rolling performance over extended use.
- Double Metal Shields (ZZ): Protect internal raceways and balls from contamination, reducing maintenance frequency.
- Low Friction Rolling: Smooth, quiet rotation ideal for high-speed and precision applications.
- Versatile Use: Suitable for 3D printers, RC cars, drones, robotics, fishing reels, medical instruments, hobby motors, and miniature machinery.
- Value Pack: 10 bearings per pack — great for projects requiring multiple replacements or spares.
Common Applications
- 3D printer axes and extruder mechanisms
- RC cars, trucks, and drones
- Robotics and servo mechanisms
- Fishing reels and small motors
- Hobby and DIY precision projects
- Miniature machinery and equipment
Package Contents
- 10 × MR63ZZ Mini Ball Bearings (3×6×2.5mm)
Made in Mainland China.
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Frequently Asked Questions
Q: What does "ZZ" mean in MR63ZZ ball bearings?
A: The "ZZ" designation indicates that the bearing has double metal shields on both sides. These shields protect the internal rolling elements and raceways from dust, debris, and minor splashing, helping to extend the bearing's service life with minimal maintenance.
Q: What applications are MR63ZZ mini ball bearings suitable for?
A: MR63ZZ bearings (3×6×2.5mm) are ideal for 3D printers, RC vehicles, drones, small motors, robotics, fishing reels, hobby projects, and any compact mechanical assembly requiring a 3mm bore and 6mm outer diameter bearing. Their small size makes them perfect for space-constrained precision equipment.
Q: Are these bearings pre-lubricated?
A: Yes, MR63ZZ bearings are typically pre-greased at the factory for smooth out-of-the-box performance. The double metal shields help retain lubrication inside the bearing, ensuring consistent rolling action throughout their service life.
Q: How many bearings are included in this pack?
A: Each pack contains 10 MR63ZZ mini ball bearings, giving you plenty of spares for multi-axis builds, replacements, or bulk hobby and repair projects.