NU2205  ECP/C3 Cylindrical Roller Bearings by SKF
NU2205  ECP/C3 Cylindrical Roller Bearings by SKF

SKF

Cylindrical Roller Bearings SKF NU2205 ECP/C3

Technical data
 
Inner diameter
25 mm
Outer diameter
52 mm
Width
18 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
Floating bearing, inner ring removable on both sides
Temperature range
-30 to +120 °C
Weight
0,161 kg
Scale quantity Your discount Unit price
25 1,82 € 34,52 €
35 3,63 € 32,71 €
36,34 €
exkl. MwSt, zzgl. Versandkosten

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Cylindrical Roller Bearings SKF NU2205 ECP/C3
In Stock

Cylindrical Roller Bearings SKF NU2205 ECP/C3

The SKF NU2205 ECP/C3 cylindrical roller bearing, with dimensions of 25x52x18 mm and a C3 clearance, offers high radial load-carrying capacity when used as a non-locating bearing.

The SKF NU2205 ECP/C3 cylindrical roller bearing is a single-row radial roller bearing with a bore diameter of 25 mm, an outer diameter of 52 mm and a width of 18 mm. Thanks to its optimised internal design, the roller arrangement can accommodate high radial loads. The inner ring has no flanges and can be removed from either side for easy installation. As this is an open bearing without integrated seals, it can be flexibly integrated into existing lubrication systems.

In which assemblies does the NU2205 ECP/C3 cylindrical roller bearing prove its worth?

Typical applications include industrial shaft bearings where high transverse forces primarily act on the bearing system. As a floating bearing, the NU design compensates for operational length changes in the shaft directly within the bearing. The inner ring moves axially relative to the outer ring without restriction, without causing unwanted stresses in the adjacent structure. The bearing is designed for operating temperatures ranging from -30 to +120 degrees.

What are the advantages of the C3 bearing clearance and the polyamide cage?

Two design features characterise this variant: the polyamide cage guides the cylindrical rollers with low friction and promotes quiet running. The slightly increased C3 radial clearance helps to ensure that tight fits on the shaft or housing do not unduly restrict the operating clearance. The free movement of the rollers is maintained even in the event of thermal expansion during continuous operation. The outer ring has no groove or lubrication bore, which simplifies the housing design.

What are the distinctive features of the NU design in the NU2205 ECP/C3 cylindrical roller bearing?

In NU-type cylindrical roller bearings, the outer ring has two fixed guide flanges, whilst the inner ring is manufactured without flanges. This allows the inner ring to be withdrawn from both ends. The bearing acts as a non-locating bearing and absorbs purely radial forces. It compensates for axial displacement of the shaft without any binding.

What are the dimensions of the NU2205 ECP/C3 cylindrical roller bearing?

The main dimensions are 25 mm internal diameter (bore), 52 mm external diameter and 18 mm width. It is a single-row cylindrical roller bearing. Thanks to its wide design, the bearing can accommodate high radial loads whilst maintaining a compact shaft arrangement.

What does the suffix ‘ECP’ mean at SKF?

The suffix ‘EC’ denotes an optimised internal design with a modified roller guide for efficient power transmission. The letter P denotes the polyamide cage fitted. This material reduces friction and inertial forces and is designed for use in a temperature range from -30 to +120 degrees.

Why is a C3 clearance required for radial bearings?

The designation C3 indicates a slightly increased radial clearance compared with the standard version. This margin is useful where press-fits on the shaft or housing cause the inner ring to expand or the outer ring to be constricted. Furthermore, the C3 clearance compensates for temperature differences between the inner and outer rings during continuous operation.

What are the tolerance classes for the NU2205 ECP/C3 cylindrical roller bearing?

The bearing combines two levels of precision: its dimensional accuracy corresponds to the ‘Normal’ tolerance class (P0/PN or ABEC 1), which facilitates interchangeability in standardised housings. In terms of running accuracy, the bearing meets the tighter tolerance class P6 or ABEC 3, which promotes low-vibration concentricity.

How do you seal an open cylindrical roller bearing correctly?

As this cylindrical roller bearing has no integrated seals, sealing is provided by the surrounding housing structure. Shaft seals, labyrinth seals or housing covers protect the bearing chamber from the ingress of dirt and moisture. Depending on the system design, lubrication is provided either by grease or via a connected oil circulation system.

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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