KB042AR0
5/16" 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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KB042AR0 Bearing Product Overview & Core Advantages
The KB042AR0 is a high-precision thin section angular contact ball bearing designed for applications requiring exceptional rigidity and accurate rotational performance. Manufactured to ABEC-1 precision standards with a 30° contact angle, this bearing excels at handling combined loads—simultaneously supporting substantial radial loads and high unidirectional axial loads. Its chrome steel construction and brass cage ensure reliable operation in demanding environments. The open design facilitates custom lubrication schemes, making it ideal for precision equipment where space and weight are critical constraints.
KB042AR0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| KB | Reali-Slim® Series Bearing |
| 042 | Bore Diameter: 4.25 inches |
| A | 30° Contact Angle |
| R | Flanged Outer Ring |
| 0 | Open (Unsealed) Design |
KB042AR0 Bearing Structural Features & Performance Benefits
Thin-Section Design: With a consistent cross-section (4.25" bore to 4.875" OD), this bearing provides maximum load capacity within minimal space, making it perfect for compact machinery and weight-sensitive applications.
High Load Capacity: The 30° contact angle and single row construction deliver excellent axial load capacity (2170 lbf static) while maintaining strong radial load performance (2150 lbf static).
Precision Engineering: Manufactured to ABEC-1 tolerance standards with tight dimensional controls (bore/OD tolerance: -0.0008" to 0"), ensuring smooth operation and minimal runout in high-precision applications.
Enhanced Stability: The brass cage provides superior guidance and stability at higher speeds, while the flanged outer ring (R designation) facilitates secure mounting and alignment.
KB042AR0 Bearing Typical Application Areas
- Aerospace & Defense: Gimbal systems, radar positioning equipment, satellite mechanisms
- Robotics: Robotic arms, rotary joints, precision positioning stages
- Medical Equipment: CT scanners, surgical robots, diagnostic imaging systems
- Industrial Automation: Rotary tables, indexing heads, precision spindles
- Optical Instruments: Telescope mounts, precision rotary stages, laser scanning systems
