6308-2Z/C4VT127
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Part No.
Part No.
6308-2Z/C4VT127
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
620 g
Tolerance class
ABEC 1 | ISO P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.015mm to 0
Width
23 mm
Width tolerance
-0.120mm to 0
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
915 lbf
Radial static load rating
5395 lbf
Limiting speed
7.5 X 1000 rpm
Lubrication
None
Radial internal clearance
C4
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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6308-2Z/C4VT127 Bearing Product Overview & Core Advantages
The 6308-2Z/C4VT127 is a single row deep groove ball bearing designed for exceptional performance in demanding industrial applications. This shielded bearing excels at handling significant radial loads while also accommodating moderate axial loads in both directions. Its key advantages include a robust construction for high rigidity, a generous C4 radial internal clearance for thermal expansion management, and integral shields that protect against contamination. Engineered with chrome steel components and manufactured to ABEC 1 | ISO P0 tolerance standards, it delivers reliable operation and long service life, making it a superior choice for applications requiring precision and durability.
Model Code In-Depth Analysis
The model number 6308-2Z/C4VT127 provides a complete technical specification:
- 6308: Basic series designation, indicating a medium-duty, single row deep groove ball bearing with a 40mm bore, 90mm OD, and 23mm width.
- -2Z: Signifies that the bearing is equipped with non-contact shields on both sides. These metal shields protect the internal components from dust and other contaminants while minimizing friction.
- /C4: Denotes a greater than normal radial internal clearance. This is critical for applications where thermal expansion is a concern, such as in electric motors, ensuring stable performance under varying operating temperatures.
- VT127: A manufacturer-specific suffix, typically indicating a special treatment, process, or variant. In this context, it confirms the bearing is supplied without lubrication ("None" per specifications), allowing the user to apply a specialized lubricant suited to their specific application needs.
6308-2Z/C4VT127 Bearing Structural Features & Performance Benefits
- Robust Construction & High Load Capacity: Manufactured entirely from chrome steel (rings, balls, and cage), this bearing offers high strength and wear resistance. With a dynamic load rating of 915 lbf and a static load rating of 5395 lbf, it is built to withstand substantial radial loads.
- Optimized for Thermal Stability: The C4 radial clearance is a key structural feature that prevents pre-loading and potential seizure in applications where the bearing inner ring heats up and expands more than the outer ring, a common scenario in electric motors and gearboxes.
- Contamination Protection & Speed: The 2Z shields effectively protect the bearing interior from particulate ingress, contributing to a long operational life. This design, combined with the precision-ground components, supports a high limiting speed of 7,500 rpm.
- Versatile Application Range: The specified operating temperature range of -30°C to 120°C and the unlubricated state (VT127) provide flexibility for use in various environments and allow for customization with high-temperature or food-grade lubricants.
6308-2Z/C4VT127 Bearing Typical Application Areas
This bearing is ideally suited for a wide range of industrial machinery and equipment, including:
- Electric Motors and Gearboxes, where the C4 clearance accommodates shaft expansion.
- Industrial Pumps and Fans, benefiting from its high-speed capability and radial load capacity.
- Material Handling Conveyors and Agricultural Machinery, where robustness and contamination resistance are paramount.
- General Industrial Machinery requiring a reliable, standard-precision deep groove ball bearing.
