R156zz
R Series Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
R156zz
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.45 g
Tolerance class
ABEC1
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
0.1875"
Bore diameter tolerance
-0.0003" to 0"
Outside diameter
0.3125"
Outside diameter tolerance
-0.0003" to 0"
Width
0.125"
Width tolerance
-0.005" to 0"
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
0.03941"
Ball quantity
10
Performance
Temperature range
-86 to 230 °F
Radial dynamic load rating
69 lbf
Radial static load rating
27 lbf
Limiting speed
53 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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R156zz Bearing Product Overview & Core Advantages
The R156zz is a precision miniature ball bearing designed for applications demanding high reliability in compact spaces. As a single row, shielded bearing constructed to ABEC1 precision standards, it offers excellent performance for radial loads. Its inch-series dimensions, including a 0.1875" bore and 0.3125" outside diameter, make it ideal for replacing worn components in OEM equipment. The bearing is pre-lubricated and features stainless steel shields for contaminant protection, contributing to its long service life and maintenance-free operation in a wide temperature range from -86 to 230 °F.
R156zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| R156 | The basic bearing designation, indicating a specific inch-size series with a 0.1875" bore diameter. |
| zz | Signifies that the bearing is equipped with shields on both sides (non-contact type). This provides effective protection against dust and other contaminants while minimizing friction. |
R156zz Bearing Structural Features & Performance Benefits
- High Precision & Smooth Operation: Manufactured to ABEC1 tolerance class with a radial internal clearance of MC3 (0.00008" to 0.0005"), ensuring smooth, low-vibration, and quiet running essential for precision instruments.
- Robust Load Capacity: With a dynamic load rating of 69 lbf and a static load rating of 27 lbf, this bearing reliably handles significant radial loads for its compact size.
- Durable Construction: Features rings and balls made from chrome steel for high hardness and wear resistance, combined with a stainless steel cage for superior corrosion resistance and stability at the limiting speed of 53,000 rpm.
- Long-Term Reliability: The 300 Series stainless steel shields retain the factory-applied lubricant and protect the internal components, enabling maintenance-free operation in a wide range of environmental conditions.
R156zz Bearing Typical Application Areas
- Precision Small Motors (e.g., stepper motors, coreless motors)
- Medical and Dental Handpieces
- Office Automation Equipment (e.g., printers, scanners, copiers)
- Instrumentation and Control Devices
- Small Fans and Blowers
- Textile Machinery Guides and Spindles
