SB120AR0
5/16" Stainless Steel Constant Section Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SB120AR0
Basic Information
Bearing type
Ball
System of measurement
Inch
Thin section bearings type
Reali-Slim Stainless Steel
Construction
Single Row
Weight
0.85 lbs
Tolerance class
ABEC-1
ISO radial rating
2853 lbf
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
12"
Bore diameter tolerance
-0.0014"– 0"
Outside diameter
12.625"
Outside diameter tolerance
-0.0014"– 0"
Width
0.3125"
Width tolerance
+.000 –.005"
Contact angle
30 °
Inner Ring Dimensions
Shoulder diameter inner ring
12.231"
Outer Ring Dimensions
Outer ring large-side face inner diameter
12.445"
Outer ring small-side face inner diameter
12.393"
Performance
Temperature range
-30°C to 110 °C
Radial dynamic load rating
1623 lbf
Radial static load rating
5840 lbf
Axial static load rating
4240 lbf
Static load moment
16860 lbf
Lubrication
Lubricated
Radial internal clearance
0.0000 – 0.0005"
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Brass
Environment & Compliance
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 925.2
/ each
In Stock
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SB120AR0 Bearing Product Overview & Core Advantages
The SB120AR0 is a thin section angular contact ball bearing designed for applications demanding high precision and space optimization. Manufactured from stainless steel with a 30° contact angle, it is engineered to support significant combined loads, handling both radial and axial forces simultaneously. Its Reali-Slim cross-section provides a compact, lightweight solution without sacrificing performance, making it ideal for high-rigidity systems where weight and space are critical constraints. The bearing comes pre-lubricated and is rated for a broad operating temperature range.
SB120AR0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SB | Indicates a Stainless Steel thin section bearing. |
| 120 | Specifies the bore diameter in inches (12.0"). |
| A | Denotes the 30° contact angle, optimized for handling high axial loads. |
| R0 | Signifies an Open (unsealed) design and ABEC-1 precision class. |
SB120AR0 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The single row angular contact design, combined with a stainless steel construction and brass cage, provides exceptional dimensional stability and resistance to deformation under combined radial and axial loads.
- Precision Performance: Manufactured to ABEC-1 tolerance standards with a controlled radial internal clearance, ensuring smooth, precise operation and minimal runout.
- Space & Weight Savings: As part of the Reali-Slim series, it features a dramatically reduced cross-section (0.3125" width) and low weight (0.85 lbs), enabling compact and lightweight machinery design.
- Corrosion Resistance & Durability: The use of stainless steel for rings and balls provides excellent corrosion resistance, suitable for demanding environments and contributing to a long service life.
SB120AR0 Bearing Typical Application Areas
This bearing is ideally suited for precision applications where its thin section and angular contact capabilities are critical. Key sectors include:
- Robotics: Rotary joints and actuator arms.
- Aerospace & Defense: Gimbal systems, radar platforms, and control mechanisms.
- Medical Equipment: CT scanners, surgical robots, and precision instrumentation.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
