NB055AR0
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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NB055AR0 Bearing Product Overview & Core Advantages
The NB055AR0 is a high-performance Angular Contact Ball Bearing designed for precision applications requiring exceptional rigidity and load capacity. Featuring a single row design with a 30° contact angle, it is engineered to support significant combined loads, including high radial and axial loads in one direction. Manufactured to ABEC-1 precision tolerances and finished with a durable Endura-kote chromium plating, this bearing offers superior corrosion resistance and extended service life in demanding environments. Its compact cross-section and high load ratings make it an ideal solution for space-constrained, high-reliability applications.
NB055AR0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| NB | Manufacturer Prefix |
| 055 | Bore Diameter: 5.5 Inches |
| A | Angular Contact Design |
| R | Ring Material: Chrome Steel |
| 0 | Open Seal / No Shield |
NB055AR0 Bearing Structural Features & Performance Benefits
The NB055AR0's performance is derived from its optimized construction. The 30° contact angle is key to its high axial load capacity (2560 lbf static), enabling it to handle substantial thrust loads in addition to its high radial dynamic load rating of 1033 lbf. The brass cage ensures stable operation and reliable guidance of the precision balls. The Endura-kote chromium plating on the rings provides a hard, smooth surface that significantly enhances wear and corrosion resistance, making it suitable for harsh operating conditions. With a tight radial internal clearance (0.0000 – 0.0005") and ABEC-1 precision, it delivers smooth, low-vibration rotation essential for high-precision applications.
NB055AR0 Bearing Typical Application Areas
This Angular Contact Ball Bearing is ideally suited for a wide range of industrial machinery where precision, rigidity, and high load capacity are paramount. Typical applications include:
- Precision Spindles in machine tools and grinding equipment
- Rotary tables and indexing heads
- High-performance pumps and compressors
- Aerospace actuation systems and gearboxes
- Medical and semiconductor manufacturing equipment
