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SKF
Self-Aligning Ball B. SKF 2212 ETN9/C3
- Technical data
- Inner diameter
- 60 mm
- Outer diameter
- 110 mm
- Width
- 28 mm
- Material
- Standard bearing steel
- Ball rows
- Double row bearing
- Seal
- None, open bearing
- Cage
- Polyamide cage
- Clearance
- Slightly increased radial clearance
- Running accuracy
- Tolerance class P0/PN2 / ABEC 1
- Bore
- Cylindrical bore
- Inner ring
- Standard version
- Temperature range
- -30 to +120 °C
- Weight
- 1,1 kg
| Scale quantity | Your discount | Unit price |
|---|---|---|
| 15 | 4,22 € | 80,32 € |
| 30 | 8,45 € | 76,09 € |
Self-Aligning Ball B. SKF 2212 ETN9/C3
The SKF 2212 ETN9/C3 self-aligning ball bearing (60x110x28 mm) compensates for misalignment and, thanks to its C3 clearance, allows for movement when the bearing heats up.
The double-row self-aligning ball bearing 2212 ETN9/C3 is characterised by its common hollow-spherical raceway in the outer ring. This design allows the inner ring, together with the ball cages, to swing freely within the bearing. Manufactured from standard roller bearing steel 100Cr6 to tolerance class P0/PN (ABEC 1), this open roller bearing is suitable for industrial bearing installations with lubrication supplied via the housing.
What is the 2212 ETN9/C3 self-aligning ball bearing suitable for in operation?
Designs with long shafts tend to experience slight deflection under load. Here, the angular-contact design automatically compensates for misalignment without causing edge stresses or increased wear. Typical applications can be found in general mechanical engineering, in conveyor systems and in gearboxes, where housing deformation or manufacturing-related misalignment between two bearing positions needs to be compensated for.
What do the polyamide cage ETN9 and the clearance C3 mean?
The suffix ETN9 denotes a lightweight polyamide cage, which ensures quiet running of the rolling elements. This material is suitable for a temperature range of –30 to +120 degrees. The designation C3 indicates a slightly increased radial bearing clearance. This additional clearance prevents the balls from jamming if, during operation, the shaft heats up more than the housing or if tight fits reduce the bearing clearance.
What are the key features of the 2212 ETN9/C3 self-aligning ball bearing?
This double-row roller bearing has a spherical outer ring raceway, which allows the inner ring and ball cages to tilt dynamically. It compensates for misalignment and shaft deflection during operation. It is manufactured from 100Cr6 bearing steel with a standard inner ring and a cylindrical 60 mm bore to standard tolerance P0.
What are the dimensions of bearing 2212?
The main dimensions are 60 mm internal diameter (bore), 110 mm external diameter and a width of 28 mm. The component has two symmetrical rows of balls, which are guided in separate raceways on the inner ring.
Why has a C3 clearance been selected for this self-aligning ball bearing?
The designation C3 indicates a larger radial bearing clearance compared with the standard CN design. Under operating conditions involving high temperatures, the inner ring expands more than the outer ring. The increased bearing clearance serves to compensate for this, ensuring that the rolling bearing does not become stressed.
What are the properties of the ETN9 polyamide cage?
The polyamide material reduces the cage’s weight and noticeably dampens operating noise. It is resistant to common lubricants and is designed for continuous operating temperatures ranging from -30 to +120 degrees. As a result, the bearing operates with low vibration, and vibration-induced stresses on the balls are reduced.
How is the 2212 open pendulum ball bearing lubricated?
As the bearing is supplied in an open version without integrated sealing washers, lubrication is provided via the housing design. Depending on the operating conditions, either grease or oil may be used for lubrication. An external seal on the housing cover protects the open raceways from dirt and moisture.
What does tolerance class P0 mean for this rolling bearing?
Tolerance class P0 (equivalent to PN or ABEC 1) corresponds to the standard tolerances for dimensional and running accuracy. This version is designed for standard applications in general mechanical engineering and defines the fit dimensions for the shaft and bearing seat.
SKF Group
Sven Wingquists Gata 2, 415 50 Gothenburg, Sweden
info@skf.com, https://www.skf.com/uk/footer/site-ownership
10020476