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SKF
Cylindrical Roller Bearings SKF NJ2307 ECP/C3
- Technical data
- Inner diameter
- 35 mm
- Outer diameter
- 80 mm
- Width
- 31 mm
- Roller rows
- Single row bearing
- Seal
- None, open bearing
- Cage
- Polyamide cage
- Clearance
- Slightly increased radial clearance
- Running accuracy
- Dimensional accuracy P0/PN or ABEC 1, running accuracy P6 or ABEC 3
- Current insulation
- No current insulation
- Bore
- Cylindrical bore
- Outer ring
- Without groove/lubrication holes
- Version2
- Improved interior construction
- Design
- Support bearing (axial displacement), inner ring removable on one side
- Temperature range
- -30 to +120 °C
- Weight
- 0,735 kg
| Scale quantity | Your discount | Unit price |
|---|---|---|
| 15 | 3,95 € | 75,15 € |
| 30 | 7,90 € | 71,20 € |
Cylindrical Roller Bearings SKF NJ2307 ECP/C3
The SKF NJ2307 ECP/C3 single-row cylindrical roller bearing (35x80x31 mm) combines high radial load capacity with a support bearing function and increased clearance (C3).
As an open roller bearing, the NJ2307 ECP/C3 cylindrical roller bearing withstands very high radial forces and supports shafts axially in one direction. Thanks to its optimised internal design and low-friction polyamide cage, the component is suitable for demanding industrial drives. The NJ design features two fixed flanges on the outer ring and one flange on the inner ring. This allows the inner ring to be withdrawn from one side, which facilitates installation in housings and onto shafts.
What is the NJ2307 ECP/C3 cylindrical roller bearing suitable for in operation?
Design engineers and maintenance personnel primarily use this design where high radial shock loads occur and a controlled axial displacement is required. Typical applications include industrial drives and shaft mountings with single-sided axial fixation. The open bearing requires an external housing with suitable lubrication and a seal. It accommodates operational thermal expansion of the shaft whilst simultaneously absorbing one-sided guiding forces.
What do the C3 bearing clearance and the polyamide cage mean when selecting a bearing?
The C3 designation indicates a slightly increased radial clearance compared with the standard series. This additional clearance compensates for thermal expansion when the bearing heats up or accommodates oversize fits on the shaft and housing. The polyamide cage reduces the moment of inertia and ensures quiet operation within a temperature range of -30 to +120 degrees. Dimensional accuracy complies with P0/PN (ABEC 1), whilst running accuracy follows the tighter tolerance of P6 (ABEC 3).
What are the distinctive features of the NJ design in the NJ2307 ECP/C3 cylindrical roller bearing?
The NJ design features two fixed flanges on the outer ring and one fixed flange on the inner ring. This enables the bearing to act as a support bearing: in addition to high radial forces, it also accommodates axial loads from one direction. The inner ring can be pulled off to one side, which facilitates the installation of separate assemblies.
What are the dimensions of the NJ2307 ECP/C3 cylindrical roller bearing?
The bearing has a cylindrical bore of 35 mm, an outer diameter of 80 mm and a width of 31 mm. The outer ring has no ring groove and no lubrication hole. Check these mounting dimensions against your shaft and housing fits before installation.
What are the benefits of bearing clearance class C3?
Class C3 provides for a greater radial clearance in the initial state than the standard version. This is designed to prevent the rolling elements from seizing up if temperature differences arise between the inner and outer rings during operation, or if tight fits reduce the radial clearance.
Within what temperature range does the polyamide cage operate reliably?
The NJ2307 ECP/C3 cylindrical roller bearing has a permissible temperature range of -30 to +120 degrees. Within these limits, the polyamide cage retains its mechanical strength and elasticity. Higher sustained temperatures can weaken the cage material and require alternative material solutions.
How is the open bearing lubricated and sealed?
As this model is designed without integrated cover plates or sealing discs, the surrounding housing structure must prevent the ingress of dirt and moisture. Lubrication is provided via the housing, either with grease or oil, depending on the respective speed and operating environment.
What tolerance classes apply to this cylindrical roller bearing?
The component combines two specifications: dimensional accuracy is achieved to the basic tolerance P0/PN or ABEC 1, whilst running accuracy corresponds to the finer class P6 or ABEC 3. This ensures low-vibration concentricity in standardised bearing seats.
SKF Group
Sven Wingquists Gata 2, 415 50 Gothenburg, Sweden
info@skf.com, https://www.skf.com/uk/footer/site-ownership
10002566