SKF Explorer 6309
Model 6309 / SKF Explorer / SKF (Official website) / Listed on page 94 of the document
Deep groove ball bearing with a 45 mm bore and 100 mm outside diameter. With a basic dynamic load rating of 55.3 kN, the calculation example uses it for life evaluation at 3000 r/min.
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Specifications
| Basic dynamic load rating Cr | 55,3 kN |
|---|---|
| Inner diameter d | 45 mm |
| Outer diameter D | 100 mm |
| Fatigue Limit Load Pu | 1,34 kN |
How to choose Deep Groove Ball Bearings
Points to check when selecting, with the values for this product (6309).
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1. Main dimensions to suit shaft and housing
This product: Inner diameter d 45 mmSelect the bore diameter d to match the shaft diameter, the outside diameter D to match the housing bore, and the width B to suit the installation space. The listed products cover a wide range of bore diameters from 0.6 to 1420 mm, and even at the same bore diameter there are dimension series with different outside diameters and widths. Since load capacity and mass change with the dimension series, confirm the three dimensions in combination.
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2. Basic dynamic load rating for life calculation
This product: Basic dynamic load rating Cr 55,3 kNThe basic dynamic load rating Cr is the reference value for calculating rolling fatigue life, and life is estimated from the ratio of the actual applied load to Cr. For high loads or when long life is required, select a bearing with a larger Cr. Bearings made of special materials may have lower ratings than steel bearings of the same dimensions, so confirm life under the operating conditions.
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3. Check static and shock loads against static rating
The basic static load rating C0r is the guideline load at which permanent deformation does not occur, applicable when stationary, rotating at low speed, or subjected to shock loads. For applications with oscillating motion or large loads while stopped, select with emphasis on the ratio to C0r (static safety factor) rather than the dynamic rating.
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4. Internal clearance to suit fit and temperature
Radial internal clearance decreases during operation due to interference fits and temperature differences between the inner and outer rings. Clearances larger than standard, such as C3, are used in applications where the inner ring tends to expand, such as motors or high-temperature environments. Clearance that is too small leads to heat generation and seizure, so determine the class from the fit and operating temperature.
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5. Materials and lubrication suited to the environment
Stainless steel or ceramics (silicon nitride, zirconia, silicon carbide) are used in water or chemical solutions, while solid lubricants such as graphite or fluorine-based solids and fluorine grease are used in high-temperature, vacuum or clean environments. Listed products have maximum operating temperatures of 250 to 350°C, so select the material and lubrication method based on temperature, atmosphere and dust-generation requirements.
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6. Check speed limits and electrical corrosion countermeasures
Confirm that the limiting speed and reference speed exceed the operating speed. In equipment where shaft current flows, such as inverter-driven motors, hybrid bearings with insulating-coated or ceramic balls can prevent electrolytic corrosion. Ceramic balls are lighter than steel balls, so the effect of centrifugal force is reduced even at high speeds.
This guide was written by AI based on the listed products' documents and specification items.
Description
The calculation example compares the bearing with the standard grease-filled sealed type (2RS1) and the sealed shield type (2Z), and considers life and bearing selection according to contamination conditions.
FAQ
- Q. What are the bore and outside diameter of the SKF Explorer 6309?
- A. The bore is 45 mm and the outside diameter is 100 mm.
- Q. What is the basic dynamic load rating of the SKF Explorer 6309?
- A. The basic dynamic load rating Cr is 55,3 kN.
- Q. What is the fatigue load limit of the SKF Explorer 6309?
- A. The fatigue load limit Pu is 1,34 kN.
- Q. How can the SKF Explorer 6309 be selected compared with sealed and sealed shield types?
- A. The calculation example compares it with the standard grease-filled sealed type (2RS1) and the sealed shield type (2Z), and considers life and bearing selection according to contamination conditions.
Written by AI based on the content of the source documents.
Source documents
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Catalog
転がり軸受
295 pages Open page 94
Found on: https://azuma-eg.com/catalogue/
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