R144zz
R Series Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
R144zz
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.4 g
Tolerance class
ABEC1
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
0.125"
Bore diameter tolerance
-0.0003" to 0"
Outside diameter
0.25"
Outside diameter tolerance
-0.0003" to 0"
Width
0.1094"
Width tolerance
-0.005" to 0"
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
0.03941"
Ball quantity
7
Performance
Temperature range
-86 to 230 °F
Radial dynamic load rating
54 lbf
Radial static load rating
17 lbf
Limiting speed
67 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.00008" to 0.0005"
Radial internal clearance
MC3
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Shield material
300 Series Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.13
/ each
In Stock
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R144zz Bearing Product Overview & Core Advantages
The R144zz is a high-precision, single row deep groove ball bearing designed for exceptional performance in compact, high-speed applications. Manufactured to ABEC1 tolerance standards, it delivers reliable operation and consistent accuracy. Its key advantage lies in its ability to efficiently handle radial loads, making it an ideal choice for applications demanding smooth rotation and long service life. The inclusion of stainless steel shields provides effective contamination protection, enhancing its durability in various operational environments.
R144zz Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| zz | Indicates the bearing is equipped with non-contact shields (ZZ) on both sides. This provides protection against contaminants while minimizing friction, making it suitable for high-speed operation. |
| R | Typically denotes a bearing manufactured to inch (imperial) dimensions. |
R144zz Bearing Structural Features & Performance Benefits
- Optimized for High Speeds: The combination of a stainless steel cage, precision-ground chrome steel components, and non-contact shields enables a high limiting speed of 67,000 rpm.
- Effective Contamination Protection: The 300 Series Stainless Steel shields guard the internal components against dust and debris, significantly extending bearing life without the added friction of contact seals.
- Robust Load Capacity: With a dynamic load rating of 54 lbf and a static load rating of 17 lbf, this bearing is engineered to handle significant radial forces in a compact form factor.
- Precision Engineering: Built to ABEC1 tolerances with a controlled radial internal clearance (MC3 group), ensuring smooth, quiet, and vibration-free operation.
R144zz Bearing Typical Application Areas
- Small Precision Motors and Spindles
- Medical and Dental Handpieces
- Office Automation Equipment (e.g., printers, scanners)
- Instrumentation and Control Devices
- High-Speed Small Fans and Blowers
