KD055ARO
1/2" 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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KD055ARO Bearing Product Overview & Core Advantages
The KD055ARO is a high-performance thin-section angular contact ball bearing designed for applications demanding precise motion control and space optimization. As part of the Reali-Slim Open Bearings series, it features a single-row construction with a 30° contact angle, enabling it to support significant combined loads—both radial and axial. Its inch-series dimensions (5.5" bore, 6.5" OD, 0.5" width) offer a compact, lightweight solution without sacrificing load capacity. Manufactured to ABEC-1 precision tolerances, this bearing is ideal for high-accuracy, high-reliability systems requiring smooth operation and minimal deflection.
KD055ARO Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| KD | Bore Diameter Series (5.5") | Standardized inch dimension for compatibility |
| 055 | Bore Size Identifier | Specific 5.5" bore diameter specification |
| A | Angular Contact Design | Optimized for combined radial and axial loading |
| R | Reali-Slim Series | Ultra-thin cross-section for space-constrained applications |
| O | Open (Unsealed) | Allows for custom lubrication schemes and high-speed operation |
KD055ARO Bearing Structural Features & Performance Benefits
Thin-Section Design: With a consistent 0.5" cross-section across all sizes, the KD055ARO provides maximum space savings while maintaining structural integrity. The single-row angular contact configuration delivers exceptional stiffness and precise rotational accuracy.
Superior Load Capacity: The 30° contact angle enables the bearing to handle substantial combined loads, with rated capacities of 2145 lbf dynamic and 4740 lbf static radial, plus 5160 lbf static axial loading. This makes it suitable for applications experiencing multi-directional forces.
Precision Engineering: Manufactured to ABEC-1 tolerance standards with tight dimensional controls (bore/OD tolerance: -0.0010" to 0"), ensuring consistent performance and easy installation. The brass cage provides excellent guidance and stability at various operating speeds.
Material Excellence: Constructed from chrome steel for both rings and balls, offering high hardness, wear resistance, and durability. The open design allows for optimal lubrication management across the operating temperature range of -30°C to 110°C.
KD055ARO Bearing Typical Application Areas
The KD055ARO thin-section angular contact ball bearing is ideally suited for:
- Robotics and Automation: Robotic arms, rotary joints, and precision positioning systems
- Aerospace and Defense: Guidance systems, radar platforms, and aircraft control mechanisms
- Medical Equipment: CT scanners, surgical robots, and diagnostic imaging devices
- Semiconductor Manufacturing: Wafer handling equipment, precision stages, and inspection machinery
- Industrial Machinery: Rotary tables, indexing heads, and precision spindles requiring high accuracy
