217 NR
200 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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217 NR Bearing Product Overview & Core Advantages
The 217 NR is a single row deep groove ball bearing designed for robust performance in demanding radial load applications. Its defining feature is the integral snap ring on the outer ring, which simplifies axial location within a housing, reducing the need for complex and costly housing designs. Manufactured with precision P0 tolerance and standard CN radial internal clearance, this bearing offers reliable operation and ease of installation. The combination of high-grade chrome steel rings and balls, along with a durable stainless steel cage, ensures long service life and consistent performance under the specified temperature range.
217 NR Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 217 | Basic bearing designation, defining the core bearing dimensions (85mm bore, 150mm OD, 28mm width). |
| NR | Indicates the outer ring has a snap ring groove and a snap ring is fitted. This feature aids in axial location. |
| Open (Seal Type) | The bearing is supplied without seals or shields, making it suitable for applications where the operating environment is clean or where specific lubrication systems are used. |
| P0 (Tolerance) | Standard dimensional and geometrical tolerance class per ISO standards, suitable for most general applications. |
| CN (Clearance) | Standard radial internal clearance for normal operating conditions and fits. |
217 NR Bearing Structural Features & Performance Benefits
- Snap Ring Locating Feature: The fitted snap ring on the outer ring provides a positive axial location, simplifying housing design and reducing assembly time and cost. The snap ring dimensions (159.7mm OD, 2.82mm width) are precision-machined for a secure fit.
- High Load Capacity: Engineered for significant radial dynamic load rating (21,762 lbf) and radial static load rating (22,481 lbf), making it ideal for applications with substantial radial forces.
- Robust Construction: The use of chrome steel for rings and balls provides high hardness and wear resistance. The stainless steel cage offers excellent corrosion resistance and durability, contributing to a high limiting speed of 4,800 rpm.
- Precision and Reliability: Manufactured to P0 tolerance class with controlled internal clearance (CN), ensuring consistent performance, low vibration, and reliable operation in a wide temperature range from -30°C to 120°C.
217 NR Bearing Typical Application Areas
The 217 NR bearing is commonly specified in applications requiring reliable radial load support and simplified housing design. Key industries and equipment include:
- Electric Motors and Generators
- Gearboxes and Power Transmission Systems
- Agricultural Machinery
- Material Handling Equipment (e.g., conveyor pulleys)
- Industrial Fans and Blowers
