Product Overview
The 6312-2RS1/C3 is a high-performance deep groove ball bearing designed specifically for demanding industrial automation applications. This SKF standard bearing features double rubber seals (2RS1) and C3 internal clearance, making it ideal for applications requiring reliable operation under varying temperature conditions and loads.
Front View - 6312-2RS1/C3 Bearing
Side View - Double Rubber Seals
Technical Specifications View
Technical Specifications
| Parameter | Specification | Description |
| Bore Diameter (d) | 60 mm | Inner diameter tolerance: -0.015mm to 0 |
| Outside Diameter (D) | 130 mm | Outer diameter tolerance: -0.018mm to 0 |
| Width (B) | 31 mm | Width tolerance: -0.150mm to 0 |
| Radius (r1, r2) | 2.1 mm | Chamfer dimensions |
| Seal Type | 2RS1 | Double rubber contact seals |
| Internal Clearance | C3 | Greater than normal clearance |
| Bearing Type | Deep Groove Ball Bearing | Single row, radial |
| Series | 6300 Series | Medium duty bearing series |
Key Features & Benefits
Double Rubber Seals (2RS1)
The 2RS1 designation indicates double rubber contact seals that provide superior protection against contamination from dust, dirt, and moisture. This feature is particularly valuable in industrial automation environments where bearings are exposed to harsh conditions.
C3 Internal Clearance
C3 clearance indicates greater than normal internal clearance, making this bearing ideal for applications where temperature variations are expected. This clearance accommodates thermal expansion and ensures smooth operation under varying thermal conditions.
High Load Capacity
As part of the 6300 series, this bearing offers excellent radial load capacity while maintaining the ability to handle moderate axial loads in both directions.
Precision Engineering
Manufactured to SKF standards, this bearing ensures consistent performance, reduced vibration, and extended service life in demanding industrial applications.
Industrial Applications in PLC Automation
Motor Applications
Electric motors in conveyor systems, pumps, and fans within automated production lines
Gearboxes & Reducers
Speed reducers and gearboxes in robotic arms and automated machinery
Conveyor Systems
Roller bearings in material handling and packaging automation systems
Pump Systems
Industrial pumps in fluid handling and processing automation
Machine Tools
Spindle bearings in CNC machines and automated manufacturing equipment
Material Handling
Bearings in automated storage and retrieval systems (AS/RS)
Performance Comparison
| Feature | 6312-2RS1/C3 | Standard 6312 | Advantage |
| Seal Protection | Double Rubber Seals (2RS1) | Open or Single Seal | Superior contamination protection |
| Internal Clearance | C3 (Greater than normal) | Normal (CN) | Better thermal compensation |
| Operating Temperature | -30°C to +120°C | -30°C to +110°C | Wider temperature range |
| Maintenance Interval | Extended | Standard | Reduced downtime |
| Contamination Resistance | High | Medium | Longer service life in harsh environments |
Installation & Maintenance Guidelines
Proper Installation
Ensure proper alignment during installation to prevent premature bearing failure. Use appropriate tools and follow manufacturer specifications for mounting pressures.
Lubrication Requirements
While the 2RS1 seals provide initial lubrication, periodic lubrication may be required depending on operating conditions. Use high-quality bearing grease compatible with the application environment.
Environmental Considerations
The double seals provide protection against most industrial contaminants, but extreme environments may require additional protective measures or more frequent maintenance intervals.
Frequently Asked Questions (FAQ)
What does the "C3" designation mean in 6312-2RS1/C3?
The "C3" designation indicates that the bearing has greater than normal internal clearance. This is particularly useful in applications where temperature variations are expected, as it accommodates thermal expansion and prevents binding.
What are the advantages of double rubber seals (2RS1)?
Double rubber seals provide superior protection against contamination from dust, dirt, moisture, and other environmental contaminants. They help retain lubrication and extend bearing life in harsh industrial environments.
What types of loads can the 6312-2RS1/C3 bearing handle?
This bearing is primarily designed for radial loads but can also handle moderate axial loads in both directions. The deep groove design allows for combined loading conditions common in industrial applications.
What is the typical operating temperature range?
The 6312-2RS1/C3 typically operates effectively in temperatures ranging from -30°C to +120°C, making it suitable for most industrial automation applications.
How does this bearing compare to standard 6312 bearings?
The 6312-2RS1/C3 offers enhanced protection with double seals and greater internal clearance compared to standard 6312 bearings. This makes it more suitable for applications with temperature variations and contamination risks.
What maintenance is required for this bearing?
The double-sealed design reduces maintenance requirements. However, periodic inspection and potential re-lubrication may be necessary depending on operating conditions, speed, and load.
Trust Metrics & Industry Standards
SKF
Manufacturing Standard
ISO 15:2011
International Standard
60-130-31
Standard Dimensions (mm)
C3
Internal Clearance Grade
External References & Technical Resources
Technical Documentation
For detailed technical specifications and engineering data, refer to SKF's official documentation for the 6312-2RS1/C3 bearing. Additional resources include:
- SKF Product Catalog - Deep Groove Ball Bearings
- ISO 15:2011 - Rolling bearings - Radial bearings - Boundary dimensions, general plan
- ANSI/ABMA Standard 20 - Radial Bearings of Ball, Cylindrical Roller, and Spherical Roller Types
- Industrial Bearing Selection Guides for Automation Applications
Industry Applications & Case Studies
This bearing has been successfully implemented in numerous industrial automation projects, including:
- Automated packaging lines in food processing
- Robotic assembly systems in automotive manufacturing
- Material handling systems in warehouse automation
- Pump and fan systems in HVAC automation
- CNC machine tools in precision manufacturing
Conclusion
The 6312-2RS1/C3 deep groove ball bearing represents an optimal solution for industrial automation applications requiring reliable performance under varying conditions. With its double rubber seals and C3 internal clearance, this bearing offers enhanced protection and thermal compensation capabilities that are essential for modern PLC-controlled automation systems. Its standardized dimensions and SKF manufacturing quality ensure compatibility and reliability across diverse industrial applications.
When selecting bearings for automation projects, the 6312-2RS1/C3 provides the right balance of protection, performance, and durability needed to minimize downtime and maximize system reliability in demanding industrial environments.