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The uxcell MR63ZZ is a set of 20 miniature deep groove ball bearings, sized 3mmx6mmx2.5mm, crafted from durable chrome steel with double steel shields to prevent contamination. Engineered for high-speed, low-friction performance, these bearings excel in handling radial and moderate axial loads while resisting heat and wear, making them ideal for precision mechanical assemblies and cycling headset components.







| ASIN | B075CMRGY6 |
| Bearing Number | MR63ZZ |
| Bearing Type | Ball Bearing |
| Best Sellers Rank | #16,176 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #28 in Deep-Groove Ball Bearings |
| Brand Name | uxcell |
| Compatible Lubricant | Grease |
| Customer Reviews | 4.4 4.4 out of 5 stars (245) |
| Item Dimensions | 5.51 x 3.94 x 0.39 inches |
| Item Thickness | 2.5 Millimeters |
| Item Weight | 7 Grams |
| Manufacturer | uxcell |
| Material Type | Alloy Steel |
| Outside Diameter | 6 Millimeters |
A**R
Quick and accurate.
Best ever.
R**K
Great little bearings...
I use them as part of internal hinges for laser finger boxes. 2mm stainless shafts fit perfectly and rotate just right, with no slop. Exactly why I purchased them.
S**R
MR52ZZ(2mm ID) Great Little bearings. Tight tolerances. Little under 2mm ID. Rusted with moisture.
I bought these for an RC Boat project to use on the output of the drive shaft. These are not stainless and rusted after the first use. They continued to work after breaking the rust free so no problem for me. Will buy stainless next time. Spun up to 25,000 RPM with no noise or vibrations of any kind. Amazing little bearings.
P**N
They work!
So tiny! The inside diameter fits a toothpick. Perfect for what I'm doing.
R**C
Bearings
press fit for 2mm shaft
M**G
Work well.
These work perfectly for my project.
A**T
Beware, bearing ID is not correct
All 20 are unusable. Bearing ID is off, should be 3mm but all measure 2.85mm. Bought to use with a 3mm shaft, but undersized for a bearing. Pressing shaft in locks up the bearing.
R**O
Tal cual estรก en la descripciรณn funciona perfectamente
F**D
Sehr gute Qualitรคt und es passt alles was beschrieben ist , ist halt ein Markenprodukt was passt.
C**Y
Item as per description. Prompt delivery. Good transaction.
R**O
Spedizione velocissima Germania - centro Italia neanche 48 ore , perfetto !!
I**H
The same if not better and definitely lower cost.
K**G
Ich verwende sie um meine Lego-Zรผge mit Kugellagern auszustatten. Sie passen perfekt und haben den richtigen Durchmesser!
Trustpilot
2 weeks ago
1 month ago