Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Bearings & Bushings |
| Origin | - |
| Material | 304 Stainless Steel |
| Outer Diameter | 4 mm |
| Available Bore Sizes | 2, 3, 5, 6, 7, 8, 9, 10, 12 mm |
| Width | 1.2 mm |
| Seal Type | ZZ Metal Shield |
| Precision Class | ABEC-7 |
| Dynamic Load Rating | 120 N |
| Maximum Speed | 30,000 RPM |
| Lubrication | Pre-greased |
| Package Quantity | 10 Pieces per Pack |
Anonymous
Apr 24, 2026
Rating: 3/5
Packaging needs improvement
The bearings themselves work well, but two arrived slightly dusty due to poor sealing in the bag. Cleaned them and they work fine.
Anonymous
Apr 16, 2026
Rating: 5/5
Great value bulk pack
Exactly what I needed for my robotics project. Consistent sizing across all 10 pieces in the pack.
Anonymous
Apr 13, 2026
Rating: 5/5
Silent operation
Replaced the noisy bearings in my desk fan with these. You can barely hear it now. Stainless steel is a nice touch for durability.
Anonymous
Apr 06, 2026
Rating: 4/5
Good quality, tight fit
Quality seems high for the price. The 3mm bore was a bit tight on my shaft initially but loosened up after use.
Anonymous
Feb 04, 2026
Rating: 5/5
Perfect for micro drones
These bearings are incredibly smooth. Used them on my 65mm whoop frame and the motors spin up instantly. Very quiet operation too.
Q: What grease is used inside?
A: They come pre-lubricated with standard lightweight bearing grease suitable for general use.
Q: Are these suitable for high RPM applications?
A: Yes, they are rated for up to 30,000 RPM depending on lubrication and load.
Q: Do you sell a 4mm bore version?
A: This specific listing is for 4mm OD. Please check our other listings for different outer diameter specifications.
Q: Can these be washed with water?
A: Being stainless steel, they resist rust, but we recommend drying them thoroughly after exposure to moisture.
Q: Is the 2mm bore true to size?
A: Yes, all bore sizes are machined to standard tolerance specifications.
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