20PCS MR85W4ZZ 675W4ZZ Miniature Ball Bearings 5x8x3mm 5x8x4mm
20PCS MR85W4ZZ 675W4ZZ Miniature Ball Bearings 5x8x3mm 5x8x4mm
Details
JARBLUE 20PCS Miniature Ball Bearings – MR85W4ZZ & 675W4ZZ
Upgrade your precision machinery, RC models, 3D printers, or small motors with these high-quality JARBLUE miniature ball bearings. This pack of 20 includes both the MR85W4ZZ (5x8x3mm) and 675W4ZZ (5x8x4mm) sizes, crafted from premium bearing steel for smooth, low-friction rotation and long-lasting durability. RoHS certified and free from high-concern chemicals, these mini bearings meet rigorous quality standards.
Key Features
- Pack of 20 – Great value, always have replacements on hand
- Two Size Options: MR85W4ZZ (5x8x3mm) & 675W4ZZ (5x8x4mm)
- Premium Bearing Steel – High hardness, wear resistance, and dimensional stability
- Double-Shielded (ZZ) – Metal shields on both sides protect against dust and debris
- RoHS Certified – Compliant with environmental and safety regulations
- Low Noise & Smooth Rotation – Ideal for high-speed, precision applications
- Wide Application – Perfect for RC cars/drones, 3D printers, miniature motors, robotics, fans, and more
Specifications
| Brand | JARBLUE |
| Model Numbers | MR85W4ZZ, MR85W3ZZ, 675W4ZZ |
| Bore Diameter | 5mm |
| Outer Diameter | 8mm |
| Width (MR85W4ZZ) | 4mm |
| Width (MR85W3ZZ) | 3mm |
| Material | Bearing Steel |
| Quantity | 20 Pieces |
| Certification | RoHS |
| Country of Origin | Made in China |
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Frequently Asked Questions
Q: What sizes are included in the 20PCS JARBLUE miniature ball bearing pack?
A: The pack includes two sizes — MR85W4ZZ measuring 5x8x4mm and MR85W3ZZ (675W4ZZ) measuring 5x8x3mm. Both feature the same 5mm bore and 8mm outer diameter, differing only in width. This makes them versatile for a range of compact mechanical applications.
Q: What applications are MR85W4ZZ and 675W4ZZ miniature ball bearings suitable for?
A: These mini ball bearings are ideal for precision and high-speed applications including 3D printers, RC cars, RC drones, small electric motors, robotics, cooling fans, and other compact machinery requiring smooth, low-friction rotation with a 5mm bore size.
Q: Are these miniature bearings double-shielded?
A: Yes. The "ZZ" designation means these bearings are fitted with metal shields on both sides, providing effective protection against dust, debris, and contamination — making them suitable for environments where cleanliness and longevity are important.
Q: What is the material used in these JARBLUE bearings?
A: These bearings are manufactured from high-quality bearing steel, which offers excellent hardness, wear resistance, and consistent performance under load. They are also RoHS certified, confirming compliance with environmental safety standards.
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.
Materials + Care
We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.
Shipping + Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.