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SKF
Cylindrical Roller Bearings SKF NJ2312 ECP
- Technical data
- Inner diameter
- 60 mm
- Outer diameter
- 130 mm
- Width
- 46 mm
- Roller rows
- Single row bearing
- Seal
- None, open bearing
- Cage
- Polyamide cage
- Clearance
- Normal 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
- Version
- Explorer
- Weight
- 2,808 kg
| Scale quantity | Your discount | Unit price |
|---|---|---|
| 2 | 10,39 € | 197,41 € |
| 5 | 20,78 € | 187,02 € |
Cylindrical Roller Bearings SKF NJ2312 ECP
The SKF NJ2312 ECP cylindrical roller bearing, measuring 60x130x46 mm, offers high radial load-carrying capacity and single-sided axial guidance when used as a support bearing.
The NJ2312 ECP cylindrical roller bearing is a single-row rolling bearing in the SKF Explorer design with an optimised internal structure. The open design, without integrated seals, is designed for high radial loads. A polyamide cage guides the rolling elements with low friction. With its standard radial clearance, the bearing is suitable for standardised mounting conditions at operating temperatures ranging from -30 to +120 degrees.
How does the NJ2312 ECP cylindrical roller bearing function as a support bearing?
When used as a support bearing, this design accommodates not only high radial forces but also axial guidance forces from one direction. The outer ring has two fixed flanges, whilst the inner ring is flangeless on one side and designed to be removable. Consequently, the bearing allows axial displacement in one direction, which compensates for thermal length changes in the shaft within the bearing housing.
What are the characteristics of the polyamide cage in the NJ2312 ECP cylindrical roller bearing?
Polyamide is characterised by its low weight compared to solid metal cages. This reduced mass minimises inertial forces during rapid speed changes and promotes low-vibration operation. Furthermore, this design offers dimensional accuracy to tolerance class P0 or ABEC 1 and running accuracy to P6 or ABEC 3. As the outer ring is designed without a groove or lubrication bore, lubricant is supplied via the housing design.
What are the key features of the NJ2312 ECP cylindrical roller bearing?
A single-row roller bearing with a 60 mm bore, 130 mm outer diameter and 46 mm width. The NJ design features two fixed flanges on the outer ring and one flange on the inner ring. This enables the bearing to support the shaft axially in one direction whilst simultaneously withstanding very high radial loads.
What is the function of the NJ design as a support bearing?
The NJ design serves as a support bearing for single-sided axial guidance of a shaft. The inner ring can be pulled out in one direction, which facilitates installation. In the opposite direction, the fixed flange limits axial relative movement between the shaft and the housing.
What is the permissible temperature range for the NJ2312 ECP cylindrical roller bearing?
The permissible operating range extends from -30 to +120 degrees. This range is primarily limited by the elastic polyamide cage. Within this temperature range, the cage material retains its mechanical strength and ensures that the roller sets remain dimensionally stable.
What does the specification for the standard radial bearing clearance mean?
Normal radial bearing clearance refers to the standard clearance between the rolling elements and the raceways when the bearing is in its unassembled state. It is suitable for common fit selections on shafts and housings, provided that no extreme temperature differences occur between the inner and outer rings during operation.
What are the bearing’s tolerance classes?
Dimensional accuracy complies with classes P0 and ABEC 1 respectively, whilst running accuracy complies with the tighter tolerance class P6 and ABEC 3 respectively. This ensures precise concentricity of the shaft whilst maintaining compatibility with standard mounting dimensions.
How is the NJ2312 ECP open cylindrical roller bearing lubricated?
The bearing has no sealing washers, nor does the outer ring have a lubrication groove or bore. The lubricant – usually grease or gear oil – is applied directly via the housing design. This open system requires a clean environment or external sealing elements on the housing.
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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