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R144ZZ Miniature Shielded Ball Bearing (3.175 x 6.35 x 2.779 mm)
- Delivers high torque density in a compact diameter design
- Precision gear structure ensures smooth & ultra-low noise operation
- Wide output speed range to meet versatile industrial needs
- Fully customizable gear ratios, shaft dimensions, and wire leads
- Heavy-duty industrial grade quality with long operational lifespan
Key Features
Engineered for superior reliability, high torque efficiency, and low-noise continuous operations.
Double Metal Shielded (ZZ) design to effectively keep lubricant in and dust/contaminants out
Ultra
precise 1/8" x 1/4" inch series sizing for compact mechanical assemblies
Low friction coefficient and minimal acoustic noise (< 20 dB) for smooth, high
speed operation
High
quality GCr15 Chrome Steel construction with high hardness, wear resistance, and fatigue strength
Pre
lubricated with premium industrial grease for immediate installation and long-term maintenance-free operation
Stamped steel cage ensures uniform ball spacing and stable rotation at high RPMs
100% dimensional and rotational accuracy test before shipment
Technical Specifications
Detailed engineering parameters, mechanical dimensions, and electrical performance figures.
| Parameters | Specifications |
|---|---|
| Model / Bearing Designation | R144ZZ / R144-2Z |
| Bearing Type | Deep Groove Ball Bearing (Miniature Metric/Inch Series) |
| Bore Diameter (Inner Diameter) | 3.175 mm / 0.125 in (1/8") |
| Outer Diameter (OD) | 6.350 mm / 0.250 in (1/4") |
| Width / Thickness | 2.779 mm / 0.1094 in |
| Closure Type | Double Metal Shielded (ZZ / 2Z) |
| Material (Rings & Balls) | Chrome Steel (GCr15 / AISI 52100) / Stainless Steel AISI 440C (Optional) |
| Cage Material | Stamping Steel / Stainless Steel |
| Precision Rating | ABEC-3 / ABEC-5 (P6 / P5) |
| Radial Internal Clearance | C0 (Standard) / C3 |
| Limiting Speed (Grease) | Up to 48,000 RPM |
| Operating Temperature Range | -30°C to +120°C |
Why Choose Us
Direct industrial manufacturing capabilities, certified international quality standards, and dependable engineering support.
Factory Manufacturing Capabilities
Modern precision workshop, advanced CNC automated machining centers, and 100% full-inspection assembly lines.
CNC Machining Workshop
High precision ±0.005mm tolerance
Automated Assembly Lines
Capacity up to 50,000 units/month
Rigorous QC & Testing Lab
Noise, torque & life cycle testingInternational Certifications
Verified compliance with global standards, supporting smooth customs clearance and regulatory approvals across North America and Europe.
ISO9001
European Conformity Verified
CE RoHS
Eco-friendly & hazardous-free
CE
Standardized Quality Management
