305-ZNR
300 Series Snap Ring Bearings
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Part No.
Part No.
305-ZNR
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
13 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
No drawings available at the moment, will be launched soon
Price:
$ 9.03
/ each
In Stock
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Product Overview and Core Advantages
The 305-ZNR is a single row deep groove ball bearing designed for exceptional radial load capacity and reliable performance in demanding applications. This precision bearing features a shielded design on one side and a unique snap ring fitted to the outer ring, providing excellent axial locating capability and simplified mounting. Manufactured from high-grade chrome steel with a stainless steel cage, it offers robust durability and consistent operation. Pre-lubricated with grease, the 305-ZNR is ready for immediate installation, making it an ideal choice for applications requiring high reliability and minimal maintenance.
305-ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 305 | Standard bore diameter code (25 mm) and series designation. |
| Z | One side shielded to protect against contamination from one direction. |
| NR | Outer ring features a snap ring groove and fitted snap ring, enabling positive axial location within a housing. |
Structural Features and Performance Benefits
- High Radial Load Capacity: The deep groove raceway and single row ball construction are optimized to handle significant radial dynamic loads (5148 lbf) and static loads (3507 lbf), ensuring stable performance under stress.
- Simplified Assembly and Axial Location: The integrated snap ring eliminates the need for complex housing shoulders or separate retaining components, reducing assembly time and cost while providing secure axial positioning.
- Contamination Protection: The shielded (Z) side effectively seals the bearing against dust and debris from one direction, extending bearing service life and maintaining lubricant integrity.
- Ready-to-Use Convenience: Factory-filled grease lubrication and standard CN radial internal clearance make the bearing immediately operational upon installation, suitable for a wide temperature range of -30°C to 120°C.
305-ZNR Bearing Typical Application Areas
- Electric Motors and small gearboxes
- Industrial Fans and blowers
- Conveyor system idler rollers and pulleys
- Agricultural machinery and power transmission systems
- Automotive components such as alternators and water pumps
