R133
R Series Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
R133
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.1 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
0.09375"
Bore diameter tolerance
-0.0003" to 0"
Outside diameter
0.1875"
Outside diameter tolerance
-0.0003" to 0"
Width
0.0625"
Width tolerance
-0.005" to 0"
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
0.0315"
Ball quantity
7
Performance
Temperature range
-86 to 230 °F
Radial dynamic load rating
36 lbf
Radial static load rating
11 lbf
Limiting speed
80 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
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.23
/ each
In Stock
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R133 Bearing Product Overview & Core Advantages
The R133 is a precision single row deep groove ball bearing designed for high-performance applications requiring reliable radial load capacity. Manufactured to ABEC1 precision class standards, this inch-series bearing offers exceptional dimensional stability and smooth operation. Its compact design, with a bore diameter of 0.09375" and a width of just 0.0625", makes it ideal for space-constrained assemblies. Constructed from high-grade chrome steel rings and balls with a durable stainless steel cage, the R133 delivers robust performance and long service life across a wide operating temperature range.
R133 Bearing Model Code Explained, Specifications & Naming Convention
| Code Element | Technical Significance |
|---|---|
| R133 | Standard inch-series bearing designation. |
| Open (Seal type) | No integral seals or shields. Requires external sealing in contaminated environments and user-applied lubrication. |
| MC3 (Radial internal clearance) | Specifies a normal radial internal clearance group (0.00008" to 0.0005"), suitable for most general applications. |
| ABEC1 | Defines the precision tolerance class, ensuring consistent dimensional accuracy and running performance. |
R133 Bearing Structural Features & Performance Benefits
- Optimized Load Capacity: The deep groove raceway and complement of seven precision balls enable efficient handling of moderate to high radial loads (36 lbf dynamic, 11 lbf static).
- High-Speed Capability: The lightweight, corrosion-resistant stainless steel cage accurately guides the balls, contributing to stable operation at limiting speeds up to 80,000 rpm.
- Material Integrity: Components made from chrome steel provide high hardness and wear resistance, while the stainless steel cage ensures durability and corrosion resistance.
- Precision Engineering: Tight dimensional tolerances and controlled radial internal clearance (MC3) result in low noise and vibration levels, which is critical for sensitive instrumentation.
R133 Bearing Typical Application Areas
- Small Precision Motors: Ideal for spindle support in miniature DC motors and stepper motors.
- Medical and Dental Handpieces: Used in high-speed surgical and dental tools requiring smooth, reliable rotation.
- Optical and Instrumentation Devices: Suitable for scanners, encoders, and other precision measurement equipment.
- Office Automation Equipment: Applied in printers, scanners, and small fans.
- Robotics and Automation: Used in joint assemblies and small gearboxes for compact robotic arms.
