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SKF
Self-Aligning Ball B. SKF 2217
- Technical data
- Inner diameter
- 85 mm
- Outer diameter
- 150 mm
- Width
- 36 mm
- Material
- Standard bearing steel
- Ball rows
- Double row bearing
- Seal
- None, open bearing
- Cage
- Sheet steel cage
- Clearance
- Normal radial clearance
- Running accuracy
- Tolerance class P0/PN2 / ABEC 1
- Bore
- Cylindrical bore
- Inner ring
- Standard version
- Temperature range
- -30 to +150 °C
- Weight
- 2,5 kg
| Scale quantity | Your discount | Unit price |
|---|---|---|
| 2 | 12,28 € | 233,23 € |
| 5 | 24,56 € | 220,95 € |
Self-Aligning Ball B. SKF 2217
The SKF 2217 angular contact ball bearing compensates for misalignment; it has main dimensions of 85 × 150 × 36 mm, a double-row design and a sheet steel cage.
The SKF 2217 double-row self-aligning ball bearing has a common spherical raceway in the outer ring. This design enables the two rows of balls to automatically compensate for angular misalignment between the shaft and the housing. Manufactured from rolling-bearing steel (100Cr6) with a cylindrical bore of 85 mm, this design primarily accommodates radial loads. The open design, without integrated sealing washers, allows grease or lubricating oil to be applied directly via the surrounding housing.
In which installation situations does the 2217 self-aligning ball bearing compensate for misalignment?
The double-row self-aligning ball bearing 2217 is used in applications where shaft deflection occurs or where there are misalignment-related deviations between the bearing seats. Designs featuring long shaft sections utilise this bearing type to compensate for static and dynamic misalignments during rotation. Thanks to the spherical outer ring raceway, the system adapts within design limits without causing increased edge pressures on the rolling elements.
What are the key features of the open design with a sheet steel cage?
This model does not require sealing rings and features a sheet steel cage. The cage guides the balls in both rows and is designed for an operating temperature range of -30 to +150 degrees Celsius. The version with standard radial clearance and the standard tolerance class P0 (ABEC 1) is suitable for common mounting conditions in mechanical engineering. An external seal must be provided for the bearing location within the housing to ensure proper operation.
What are the dimensions of the 2217 self-aligning ball bearing?
The bearing has an internal diameter (bore) of 85 mm, an external diameter of 150 mm and a width across flats of 36 mm. It is a double-row roller bearing with a cylindrical inner ring bore, manufactured from standard roller bearing steel 100Cr6 to standard dimensional and running tolerances.
Why is a double-row self-aligning ball bearing chosen?
The hollow spherical raceway in the outer ring allows the inner ring and ball set to adjust freely. Should the shaft become deflected or the housing become misaligned, the bearing automatically compensates for this angular misalignment. This prevents undesirable forced forces, which benefits the smooth running of the entire system.
What does ‘normal radial bearing clearance’ mean for this bearing?
Standard radial bearing clearance, often referred to technically as ‘CN’, defines the internal clearance between the rolling elements and the raceways prior to installation. This specification is designed to suit standard shaft and housing fits. Once the inner ring has been pressed into place, exactly the right amount of operating clearance remains to ensure low-friction concentricity.
Which lubricant is required for the open design?
In open designs without integrated seals, the choice of lubricant depends on the operating speed and ambient conditions. Mineral oil-based rolling-element bearing greases or continuous oil circulation lubrication are frequently used. An external housing seal protects the bearing housing from the ingress of contaminants.
What is the temperature range for which the 2217 self-aligning ball bearing is specified?
The combination of a dimensionally stable sheet steel cage and heat-treated roller bearing steel (as standard) covers operating temperatures ranging from -30 to +150 degrees Celsius. When designing the bearing arrangement, care must be taken to ensure that the selected external lubricant is also approved for the prevailing operating temperature.
What is the tolerance class of this SKF bearing?
The model complies with the standard tolerances of Class P0 or PN, which corresponds to Class ABEC 1 in international terminology. This tolerance class covers the standard requirements of general mechanical and plant engineering in terms of dimensional accuracy, concentricity and parallelism.
SKF Group
Sven Wingquists Gata 2, 415 50 Gothenburg, Sweden
info@skf.com, https://www.skf.com/uk/footer/site-ownership
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