Bearings
Ball Bearings
Dunlop & Budget Ball Bearings
Quick Code: BB-522201
MR128 ZEN Open Deep Groove Ball Bearing 8mm x 12mm x 2.5mm
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Product Specification
Ball rows
Single row bearing
Bore
Cylindrical bore
Brand
ZEN
Cage
Sheet steel cage
Clearance
Normal radial clearance
Current insulation
No current insulation
Inside Dia
8mm
Material
Standard bearing steel
Material of rolling elements
Standard bearing steel
Outer ring
Without flange/groove
Outside Dia
12mm
Sealing
Open
Temperature range
-20 to +120 °C
Tolerance class
Tolerance class P0/PN2 / ABEC 1
Width
2.5mm
Reference
MR128
Additional Reference:
10141239
Quick Order Code
BB-522201
Product Description
The MR128 ZEN Open Deep Groove Ball Bearing is a compact, precision-engineered bearing designed for small-scale mechanical applications requiring reliable and efficient rotational performance. This ultra-thin bearing offers exceptional versatility in a miniature 8mm x 12mm x 2.5mm form factor.
Key Features:
- Single row deep groove ball bearing configuration
- Open design for optimal lubrication and grease circulation
- Cylindrical bore with 8mm inside diameter
- Compact 12mm outside diameter
- Ultra-thin 2.5mm width
- Sheet steel cage construction
- Standard bearing steel material
- Normal radial clearance
- Operating temperature range: -20°C to +120°C
- Tolerance class P0/PN2 (ABEC 1)
- No current insulation
Typical Applications:
- Miniature precision equipment
- Small electric motors
- Hobby and model engineering
- Robotics and micro-mechanical systems
- Lightweight office and consumer electronics
- Instrument and measurement devices
The MR128 ZEN bearing provides excellent performance in applications requiring minimal friction and smooth rotation. Its open design allows for easy lubrication and is particularly suitable for environments where regular maintenance is possible and contamination is minimal.
Benefits:
- Extremely compact dimensions
- Easy maintenance and relubrication
- Cost-effective solution for small-scale applications
- Smooth and consistent rotational performance
- Wide temperature tolerance
- Versatile mounting options


