KB040AR0
5/16" Constant Section Bearings
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Part No.
Part No.
KB040AR0
Basic Information
Bearing type
Ball
System of measurement
Inch
Thin section bearings type
Reali-Slim Open
Construction
Single Row
Weight
0.3 lbs
Tolerance class
ABEC-1
ISO radial rating
1934 lbf
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
4"
Bore diameter tolerance
-0.0008"– 0"
Outside diameter
4.625"
Outside diameter tolerance
-0.0006"– 0"
Width
0.3125"
Width tolerance
+.000 –.005"
Contact angle
30 °
Inner Ring Dimensions
Shoulder diameter inner ring
4.231"
Outer Ring Dimensions
Outer ring large-side face inner diameter
4.46"
Outer ring small-side face inner diameter
4.393"
Performance
Temperature range
-30°C to 110 °C
Radial dynamic load rating
865 lbf
Radial static load rating
2040 lbf
Axial static load rating
2100 lbf
Static load moment
5890 lbf
Lubrication
Lubricated
Radial internal clearance
0.0000 – 0.0005"
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Brass
Environment & Compliance
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 98.85
/ each
In Stock
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KB040AR0 Bearing Product Overview & Core Advantages
The KB040AR0 is a high-precision thin section angular contact ball bearing designed for applications demanding exceptional rigidity and precise motion control. Engineered with a 30° contact angle and single row construction, it is optimized to handle significant combined loads, including high thrust loads in one direction alongside radial loads. Its Reali-Slim open design offers a compact cross-section, maximizing space efficiency in sophisticated machinery where weight and size are critical constraints. Manufactured to ABEC-1 tolerance standards, this bearing delivers reliable performance for high-accuracy applications.
KB040AR0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| KB | Indicates the manufacturer's series for thin section bearings. |
| 040 | Specifies the bore diameter in inches (4"). |
| A | Denotes the 30° contact angle, which is optimal for handling high axial loads. |
| R0 | Signifies Radial Internal Clearance of 0.0000 – 0.0005", providing precise running accuracy. |
KB040AR0 Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single row angular contact design, combined with a 30° contact angle and a robust brass cage, provides high rigidity and enables the bearing to support substantial combined radial and axial loads (Radial Dynamic: 865 lbf, Axial Static: 2100 lbf).
- Precision Engineering: Manufactured to ABEC-1 tolerances with a very tight radial internal clearance, this bearing ensures smooth, precise operation and minimal runout, which is critical for high-accuracy systems.
- Space-Saving Design: As part of the Reali-Slim series, it features a thin cross-section (Width: 0.3125"), allowing for compact and lightweight assembly designs without sacrificing performance.
- Durable Material Construction: Components made from chrome steel for both rings and balls offer high wear resistance and durability, suitable for a wide operating temperature range of -30°C to 110°C.
KB040AR0 Bearing Typical Application Areas
- Robotics and Automation: Rotary joints, actuator arms, and precision gearing systems.
- Aerospace and Defense: Guidance systems, radar platforms, and actuation mechanisms.
- Medical Equipment: Imaging devices (CT/MRI scanners) and surgical robot joints.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
