305-2ZNR
300 Series Snap Ring Bearings
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Part No.
Part No.
305-2ZNR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.24 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.013mm to 0
Width
17 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Outside diameter of snap ring
67.7 mm
Width of snap ring
1.7 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
5148 lbf
Radial static load rating
3507 lbf
Limiting speed
10.4 X 1000 rpm
Lubrication
Grease
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
Price available upon request.
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305-2ZNR Bearing Product Overview & Core Advantages
The 305-2ZNR is a single row deep groove ball bearing designed for exceptional radial load capacity and reliable operation. This shielded bearing features a snap ring on its outer ring, enabling simplified axial positioning within a housing. Manufactured with precision tolerances (P0 class) and pre-lubricated with grease, it offers a compact, ready-to-install solution for applications demanding high reliability and minimal maintenance.
305-2ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Advantage |
|---|---|---|
| 305 | Standard bore diameter code (25 mm) | Standardized dimensions for easy interchangeability. |
| 2Z | Non-contact shields on both sides | Effective contamination protection with minimal impact on limiting speed. |
| NR | Snap ring groove and snap ring fitted on the outer ring | Simplifies assembly and provides secure axial location, reducing housing design complexity. |
305-2ZNR Bearing Structural Features & Performance Benefits
- Robust Construction & High Load Capacity: The single row deep groove raceway and chrome steel components provide a high radial dynamic load rating of 5148 lbf, making it suitable for significant radial loads.
- Enhanced Sealing & Contamination Resistance: The 2Z shields protect the bearing's interior from dust and debris, extending service life and ensuring reliable performance in challenging environments.
- Simplified Assembly with Snap Ring: The integrated snap ring (NR) allows for easy and secure axial positioning, eliminating the need for complex housing shoulders and reducing assembly time and cost.
- Maintenance-Free Operation: Pre-lubricated with grease and sealed by shields, this bearing is designed for long-term, maintenance-free operation within its specified temperature range.
- Stainless Steel Cage: The stainless steel cage ensures high strength and corrosion resistance, contributing to stable performance at the limiting speed of 10,400 rpm.
305-2ZNR Bearing Typical Application Areas
This versatile bearing is ideally suited for a wide range of applications where reliable radial load support and simplified mounting are key:
- Electric Motors and Gearboxes
- Industrial Pumps and Fans
- Conveyor Systems and Material Handling Equipment
- Agricultural Machinery
- Automotive Components (e.g., alternators, idler pulleys)
