212-ZNR
200 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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212-ZNR Bearing Product Overview & Core Advantages
The 212-ZNR is a single row deep groove ball bearing designed for exceptional reliability in demanding radial load applications. Its shielded construction provides effective contamination protection while the integral snap ring on the outer ring simplifies axial location and housing design, enabling more compact assemblies. Manufactured to P0 tolerance class with standard CN radial internal clearance, this bearing delivers consistent performance and high precision operation across a wide temperature range from -30°C to 120°C.
212-ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 212 | Standard bore diameter series designation | Indicates 60mm bore diameter with optimized load capacity |
| Z | Single shielded side | Effective contaminant exclusion while maintaining high-speed capability |
| NR | Snap ring groove with snap ring | Simplifies axial positioning, reduces assembly complexity and costs |
212-ZNR Bearing Structural Features & Performance Benefits
Optimized Load Distribution: The single row deep groove raceway geometry enables efficient handling of radial loads up to 12,612 lbf dynamic capacity, while accommodating moderate axial loads in both directions.
Enhanced Contamination Protection: The shielded design provides superior sealing against solid contaminants while maintaining low friction operation, contributing to the limiting speed of 6,700 rpm.
Simplified Installation & Positioning: The integrated snap ring (outer diameter: 116.6mm, width: 2.46mm) eliminates the need for complex housing shoulders, enabling cost-effective bearing arrangements and reducing assembly time.
Premium Material Construction: Chrome steel rings and balls combined with a stainless steel cage provide excellent durability, corrosion resistance, and consistent performance across the specified temperature range.
212-ZNR Bearing Typical Application Areas
- Electric Motors & Generators: Ideal for main shaft support in industrial motors requiring reliable radial load capacity and simplified housing design
- Gearboxes & Transmission Systems: Suitable for output shafts and intermediate shafts where snap ring location simplifies assembly
- Material Handling Equipment: Conveyor rollers, pulley systems benefiting from the shielded protection against industrial contaminants
- Agricultural Machinery: Implement drives and PTO shafts requiring robust bearing performance in challenging environments
- Industrial Pumps & Compressors: Shaft support applications where the combination of high precision and contamination protection is critical
