311-Z
With Filling Slots Deep Groove Bearings
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Part No.
Part No.
311-Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.5 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.015mm to 0
Width
29 mm
Width tolerance
-0.15mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
17805 lbf
Radial static load rating
15062 lbf
Limiting speed
6.3 X 1000 rpm
Lubrication
Grease
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Nylon
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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311-Z Bearing Product Overview & Core Advantages
The 311-Z is a single row deep groove ball bearing designed for high-performance applications requiring reliable operation under radial loads. Its construction features shielded protection on both sides, retaining factory-applied grease lubrication and effectively excluding contaminants. Manufactured to P0 tolerance class with standard CN radial internal clearance, this bearing offers a robust balance of precision, durability, and value for a wide range of industrial uses. Its compact design and high load capacity make it an excellent choice for applications demanding consistent performance and long service life.
Model Code Breakdown
| Model Segment | Code | Technical Meaning |
|---|---|---|
| Basic Designation | 311 | Standard metric series deep groove ball bearing with 55mm bore, 120mm OD, and 29mm width. |
| Seal/Shield Type | Z | Bearing is equipped with a shielded (non-contact) closure on one side to protect against contamination while maintaining high-speed capability. |
311-Z Bearing Structural Features & Performance Benefits
- High Load Capacity & Rigidity: The single row deep groove raceway and chrome steel construction provide a high radial dynamic load rating of 17,805 lbf and a static load rating of 15,062 lbf, ensuring stable operation under significant stress.
- Optimized Speed Performance: The combination of a lightweight nylon cage and effective grease lubrication enables a limiting speed of 6,300 rpm, suitable for a broad range of operational velocities.
- Enhanced Service Life & Low Maintenance: The shielded design protects the pre-lubricated grease from contaminants, extending relubrication intervals and promoting a long, maintenance-free service life in many environments.
- Precision & Consistency: Manufactured to P0 tolerance class with standard CN radial internal clearance, ensuring reliable and predictable performance in general precision applications.
311-Z Bearing Typical Application Areas
- Electric Motors & Generators
- Industrial Gearboxes
- Material Handling Equipment (Conveyors, Pulleys)
- Agricultural Machinery
- General Industrial Machinery (Pumps, Fans, Blowers)
