Introducing the MR128 2Z Bearing 8X12X3,5*, a precision-engineered deep groove ball bearing designed for micro applications. This miniature bearing, with dimensions of 8 mm bore diameter, 12 mm outer diameter, and 3.5 mm thickness, is perfectly suited for high-precision environments such as robotics and medical devices. Its compact size and construction make it ideal for applications requiring high-speed and low-friction performance.
Technical specifications
| Specification | Value |
|---|---|
| Bore diameter (d) | 8 mm |
| Outer diameter (D) | 12 mm |
| Width (B) | 3.5 mm |
| Shielding / Sealing | 2Z |
| Ring material | Chrome steel 100Cr6 |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
Technical advantages
The MR128 2Z Bearing offers several technical advantages that enhance its performance in demanding applications:
- Miniature size supports continuous operation at high speeds in compact mechanisms.
- Chrome steel rings ensure a rolling-contact fatigue life exceeding 107 cycles.
- Standard CN radial clearance is optimal for assemblies without preload, aiding easy integration.
- Dual metal shields (2Z) provide effective protection against contamination.
- Precision class P0 / ABEC-1 offers a balance of accuracy and cost-efficiency for standard applications.
Typical applications
The MR128 2Z Bearing is commonly used in the following sectors:
- Measurement and laboratory instruments including optical encoders and electronic micrometers.
- Aeromodelling and drones, specifically in brushless motors and planetary gearboxes.
- Dental equipment like turbines and micromotors, where precision and smooth operation are crucial.
- Precision robotics involving harmonic drive reducers and cardan joints.
Availability and ordering
Eurobearing.eu, your specialized B2B supplier for mechanical industrial components, offers the MR1282Z-ECO with fast availability. For bulk orders, request a quotation or simply add the product to your cart for immediate purchase.

