R2zz
R Series Miniature Bearings
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Part No.
Part No.
R2zz
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
1.37 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
0.375"
Outside diameter tolerance
-0.0003" to 0"
Width
0.1562"
Width tolerance
-0.005" to 0"
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
0.06252"
Ball quantity
7
Performance
Temperature range
-86 to 230 °F
Radial dynamic load rating
121 lbf
Radial static load rating
39 lbf
Limiting speed
56 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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R2zz Bearing Product Overview & Core Advantages
The R2zz is a precision miniature ball bearing engineered for demanding applications requiring reliable performance in compact spaces. As a single row deep groove ball bearing with shielded construction, it is primarily designed to handle radial loads efficiently. Its inch-series dimensions, high-grade chrome steel components, and ABEC1 precision class make it an ideal choice for high-speed, low-noise operations in precision instruments and small machinery, offering an excellent balance of performance, durability, and value.
R2zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| R | Series designation for inch-size miniature bearings |
| 2 | Bore diameter code (0.125") |
| zz | Double-sided shields (non-contact) for contaminant protection while maintaining high-speed capability |
R2zz Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a stainless steel cage, precision-ground chrome steel balls, and non-contact shields enables a limiting speed of 56,000 rpm, making it suitable for high-rotation applications.
- Radial Load Capacity: With a dynamic load rating of 121 lbf and static load rating of 39 lbf, this bearing provides reliable support for radial forces in compact assemblies.
- Precision Engineering: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), ensuring smooth operation and reduced vibration.
- Durable Construction: Components made from chrome steel (rings and balls) and 300 series stainless steel shields offer excellent wear resistance and corrosion protection.
- Compact & Lightweight: With an overall weight of just 1.37 grams and compact bearing dimensions (0.125" bore x 0.375" OD x 0.1562" width), it is ideal for space-constrained designs.
R2zz Bearing Typical Application Areas
- Precision Instruments: Optical encoders, medical devices, and laboratory equipment
- Small Motors & Drives: Stepper motors, DC micromotors, and spindle drives
- Office Automation: Printers, scanners, and copiers
- Computer Peripherals: Hard disk drives, cooling fans
- Robotics & Automation: Small robotic joints, linear actuators, and guidance systems
