-
Bearings
Bearings
-
Housings/housing Units
Housings/housing Units
-
Linear Technology
Linear Technology
-
V-Belts
V-Belts
-
Seals
Seals
FAG
Cylindrical Roller Bearings FAG NU221 -E-XL-TVP2-C3
- Technical data
- Inner diameter
- 105 mm
- Outer diameter
- 190 mm
- Width
- 36 mm
- Roller rows
- Single row bearing
- Seal
- None, open bearing
- Cage
- Polyamide cage
- Clearance
- Slightly increased radial clearance
- Running accuracy
- Tolerance class P0/PN2 / ABEC 1
- Current insulation
- No current insulation
- Bore
- Cylindrical bore
- Outer ring
- Without groove/lubrication holes
- Design
- Floating bearing, inner ring removable on both sides
- Temperature range
- -30 to +120 °C
- Weight
- 4 kg
| Scale quantity | Your discount | Unit price |
|---|---|---|
| 2 | 11,58 € | 220,28 € |
| 5 | 23,18 € | 208,68 € |
Cylindrical Roller Bearings FAG NU221 -E-XL-TVP2-C3
The FAG NU221 -E-XL-TVP2-C3 cylindrical roller bearing, with a 105 mm bore, acts as a non-locating bearing for high radial loads with variable shaft lengths.
The FAG NU221 -E-XL-TVP2-C3 cylindrical roller bearing is a single-row radial roller bearing designed for heavy loads. With dimensions of 105 mm bore, 190 mm outer diameter and 36 mm width, it accommodates radial forces. In the NU version, the outer ring has two guide flanges, whilst the flangeless inner ring can be removed from both sides. This separate assembly simplifies bearing installation in challenging shaft seats.
When is the NU221 -E-XL-TVP2-C3 cylindrical roller bearing suitable as a floating bearing?
This design is used in bearing arrangements where thermal length changes in the shaft need to be compensated for. Thanks to the flangeless inner ring, the shaft moves axially relative to the outer ring without generating stress in the housing. The design accommodates purely radial forces. It is intended for bearing arrangements in which axial forces are supported by a separate fixed bearing.
What is the function of the polyamide cage and the C3 clearance?
The designation TVP2 stands for a polyamide cage which guides the cylindrical rollers and, due to its low weight, reduces inertial forces during changes in rotational speed. The designation C3 indicates a slightly increased radial clearance. This increased radial clearance helps to prevent stress build-up in the case of tight fits or thermal differences between the inner and outer rings. The open-type bearing is designed for a temperature range of -30 to +120 degrees Celsius.
What are the dimensions of the NU221 -E-XL-TVP2-C3 cylindrical roller bearing?
The bearing has an inside diameter of 105 mm, an outside diameter of 190 mm and a width of 36 mm. It is manufactured to tolerance class P0 or PN (comparable to ABEC 1) and has neither lubrication grooves nor bores on the outer ring.
What are the distinctive features of the NU design in this rolling bearing?
In the NU design, the outer ring has two fixed retaining flanges between which the rollers are guided. The inner ring has a smooth finish and no flanges. This allows the inner ring to be removed from either side, enabling the rings to be fitted to the shaft and housing separately and permitting axial movement during operation.
What does the ‘C3’ designation mean in relation to bearing clearance?
The designation C3 indicates a radial bearing clearance that exceeds the standard clearance. This increased clearance serves to accommodate operational expansion caused by temperature differences between the inner and outer rings. It also compensates for the reduction in cross-sectional area that occurs with tight fits on the 105 mm shaft or within the housing.
What are the properties of the TVP2 polyamide cage?
The TVP2 cage is made of polyamide and maintains a defined distance between the rollers. Compared to solid metal cages, the plastic cage is characterised by its low weight, good damping properties and quiet operation. The material can be used within the bearing’s permissible temperature range of -30 to +120 degrees Celsius.
How is the open cylindrical roller bearing lubricated?
As this cylindrical roller bearing is supplied as an open bearing without integrated sealing washers, lubrication must be provided via the surrounding structure. Depending on the rotational speed and operating conditions of the plant, the bearing is operated using grease or lubricating oil. At the same time, external seals in the machine housing must protect the bearing against the ingress of dirt and moisture.
Schaeffler Technologies AG & Co. KG
Industriestraße 1-3, 91074 Herzogenaurach, Germany
info.de@schaeffler.com, https://www.schaeffler.de/de/meta/impressum/
10004192