NA045ARO
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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NA045ARO Bearing Product Overview & Core Advantages
The NA045ARO is a single row angular contact ball bearing designed for inch-system applications requiring high precision and reliable performance. This thin section bearing features Endura-kote chromium plating for enhanced corrosion resistance and durability. Engineered to accommodate combined radial and axial loads simultaneously, its 30° contact angle provides optimal load distribution. With an ABEC-1 precision class rating and open construction, it delivers exceptional rotational accuracy for demanding applications where space constraints and weight reduction are critical factors.
NA045ARO Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| NA | Angular contact bearing series designation |
| 045 | Bore diameter: 4.5 inches |
| A | 30° contact angle design |
| R | Reinforced construction with brass cage |
| O | Open seal type (no shields or seals) |
NA045ARO Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to ABEC-1 tolerance standards with tight dimensional control (bore/OD tolerance: -0.0008" to 0") ensuring consistent performance in precision applications.
Superior Load Capacity: The 30° contact angle enables efficient handling of combined radial and axial loads, with rated capacities of 637 lbf (dynamic) and 1660 lbf (static radial).
Premium Material Selection: Chrome steel rings and balls combined with brass cage material provide excellent wear resistance and operational stability.
Corrosion Protection: Endura-kote chromium plating offers superior surface protection, extending service life in challenging environments.
Optimized Design: Thin section configuration (0.25" width) with precise shoulder diameters (4.686" inner, 4.814"/4.865" outer) ensures proper fit and alignment in compact assemblies.
NA045ARO Bearing Typical Application Areas
- Aerospace control systems and actuator mechanisms
- Medical equipment including surgical robots and imaging devices
- Precision instrumentation and measuring equipment
- Robotics and automation systems requiring high accuracy
- Optical positioning systems and rotary tables
- Semiconductor manufacturing equipment
- Military and defense systems requiring reliable performance
