KA040AR0
1/4" Constant Section Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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KA040AR0 Bearing Product Overview & Core Advantages
The KA040AR0 is a high-precision thin section angular contact ball bearing engineered for applications demanding exceptional space efficiency and performance. Designed with a single row construction and 30° contact angle, this bearing excels at supporting combined loads—simultaneously handling substantial radial and axial forces. Its ABEC-1 precision class ensures reliable operation in high-accuracy systems, while the compact cross-section (0.25" width) makes it ideal for weight-sensitive and space-constrained designs. The open design allows for custom lubrication schemes, providing flexibility for various operational environments.
KA040AR0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| K | Identifies the bearing as part of the Reali-Slim® series |
| A | Angular contact design |
| 04 | Bore diameter code for 4" |
| 0 | Cross-section series designation |
| AR | Standard radial internal clearance |
| 0 | Open (unsealed) configuration |
KA040AR0 Bearing Structural Features & Performance Benefits
Optimized Thin-Section Design: With a minimal cross-section of just 0.25" width, this bearing delivers maximum performance in minimal space, reducing system weight and enabling compact machinery design.
High Load Capacity: The 30° contact angle and premium chrome steel construction provide excellent combined load capability, with dynamic radial load rating of 595 lbf and static axial load rating of 1470 lbf.
Precision Performance: Manufactured to ABEC-1 tolerance standards with controlled radial internal clearance (0.0000 – 0.0005"), ensuring smooth operation and minimal vibration in precision applications.
Enhanced Durability: The brass cage provides superior guidance and stability, while the hardened chrome steel rings and balls deliver extended service life under demanding conditions.
Flexible Lubrication: The open design allows for customized lubrication strategies, accommodating various speed requirements and operating temperatures from -30°C to 110°C.
KA040AR0 Bearing Typical Application Areas
The KA040AR0 thin section angular contact bearing is ideally suited for:
- Robotics and Automation: Robotic arms, rotary joints, and precision positioning systems
- Aerospace & Defense: Guidance systems, radar platforms, and satellite mechanisms
- Medical Equipment: CT scanners, surgical robots, and diagnostic instrumentation
- Semiconductor Manufacturing: Wafer handling equipment and precision stages
- Optical Systems: Telescope mounts, mirror positioning systems, and laser scanning equipment
