R2
R Series Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
R2
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
1.04 g
Tolerance class
ABEC1
Seal type
Open
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
MC3
Radial internal clearance
0.00008" to 0.0005"
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
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
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
R2 Bearing Product Overview & Core Advantages
The R2 series inch-sized ball bearing represents a precision-engineered single row radial ball bearing designed for compact applications requiring reliable performance. Manufactured to ABEC1 tolerance class, this bearing delivers consistent operation and is engineered to handle pure radial loads efficiently. Its open design allows for versatile lubrication options, while the chrome steel construction ensures durability and a long service life across a wide temperature range from -86 to 230 °F. This bearing is an ideal solution for applications where space is limited and dependable radial load capacity is paramount.
R2 Bearing Model Code Explained, Specifications & Naming Convention
| Code/Feature | Technical Significance |
|---|---|
| R2 | Series designation for this specific inch-sized bearing. |
| Open (Seal Type) | No integral seals or shields. Allows for custom lubrication and is suitable for clean environments or where specific lubricants are applied externally. |
| MC3 (Radial Internal Clearance) | Specifies a greater than normal internal clearance range (0.00008" to 0.0005"). Beneficial for applications with significant thermal expansion or where interference fits are used. |
| ABEC1 (Tolerance Class) | Defines the precision level for dimensional accuracy and running tolerance. ABEC1 is a standard grade suitable for a wide range of general-purpose applications. |
R2 Bearing Structural Features & Performance Benefits
- Optimized Load Capacity: The single row deep groove construction and 7 high-grade chrome steel balls provide a radial dynamic load rating of 121 lbf and a static rating of 39 lbf, making it robust for its compact size.
- Precision & Stability: Built to ABEC1 tolerances with a stainless steel cage for consistent ball guidance and stable operation at the specified limiting speed of 56,000 rpm.
- Versatile Application Fit: The open design and MC3 radial clearance offer flexibility. It can accommodate thermal gradients and allows for the use of specialized lubricants tailored to specific operational needs.
- Durability & Compliance: Constructed from chrome steel rings and balls for high wear resistance. The bearing is ROHS and REACH compliant, meeting modern environmental and safety standards.
R2 Bearing Typical Application Areas
This R2 series bearing is ideally suited for a variety of precision mechanisms and industrial equipment, including:
- Small electric motors and precision spindles
- Medical and dental handpieces
- Office automation equipment (printers, scanners)
- Instrumentation and control devices
- Textile machinery components
- Radio control models and small gearboxes
