
Model Numbers: BR128, MR128, MR128ZZ
Brands Carried: MISUMI, NSK, EZO, NSK Micro Precision
Bearing Sizing: ID 8mm X OD 12mm X W 2.5mm, 8 mm Ball Bearing
Bearing Seals: Open, Double Shielded
For more MR128 ball bearings and seal options — we have hundreds visit MISUMI.
Select Part Numbers to Buy MR128 Ball Bearings
| Bearing Seals | MISUMI | NSK | EZO (SPB-USA) | NSK MICRO PRECISION |
|---|---|---|---|---|
| Open Type | BR128 | – | MR128 | MR128 |
| Single Shielded | – | – | – | – |
| Double Shielded | – | MR128ZZ | MR128ZZ | – |
| Rubber Sealed | – | – | – | – |
Please select between the four options above:
Open Type:

BR128 Ball Bearing
MR128 Ball Bearing

BR128 Ball Bearing
MR128 Ball Bearing
Single Shielded:


Double Shielded:

MR128ZZ Ball Bearing

MR128ZZ Ball Bearing
Rubber Sealed:


Miniature Ball Bearings MR128 – 8X12X2.5mm Description
The MR128 is a 8 mm Ball Bearing that can be used in many rotary and factory automation applications. The MR128 Miniature Ball Bearings is an open style bearing. The MR128ZZ ball bearing has a single row raceway and it is shielded on each side. The MR128 8 mm Ball Bearing Inner Dimension 8mm X Outer Dimension 12mm X Width 2.5mm is an open style ball bearing designed for high rotational speeds and high dynamic loads.
MR128 Ball Bearings 8X12X2.5mm Specifications & Dimensions
| Universal | MR128 |
|---|---|
| Type | Ball |
| Inner/Outer Ring Material | Steel |
| Precision | Grade 0 |
| Inner Dimension d(Ø) | 8 |
| Outer Dimension D(Ø) | 12 |
| Width B (or T)(mm) | 2.5 |
| Retainer Type | Punching |
| Load Direction | Radial |
| Specifications/Environment | Standard |
| Number of Raceway Ring Rows | Single Track |
| Size Standards | Metric Series |

Miniature Ball Bearings MR128 – Technical Specifications/Dimensions
Open Ball Bearings
Single Shielded Ball Bearings
Double Shielded Ball Bearings
Rubber Sealed Ball Bearings
Other Ball Bearing Series

