Cylindrical Roller Bearings for FAG

Cylindrical Roller Bearings for FAG are separate bearings and are very convenient to install and disassemble. Cylindrical Roller Bearings for FAG can withstand large radial loads and are suitable for use in high-speed operation situations.

 

 

This type of bearing allows the angular error (inclination) between the axis of the inner ring and the axis of the outer ring to be very small, only 2′ to 4′. Therefore, the machining accuracy of the shaft and bearing seat is relatively high. Otherwise, uneven loads or stress concentrations may easily occur at the raceway contact parts. However, the occurrence of stress concentration can be reduced by correcting the roller or raceway contact busbar.

 

Cylindrical roller bearings can be divided into different structures such as single-row, double-row and multi-row cylindrical roller bearings according to the number of rows of rolling elements. Different structural bearings are also reflected in the position design of the ribs. Among them, the commonly used cylindrical roller bearings have the following forms: Single row cylindrical roller bearings: Single row cylindrical roller bearings are separable bearings, which are easy to install and disassemble. Both rings can use tight fits, modified rollers and rollers. Contact lines between tracks reduce stress concentrations.

 

Double row cylindrical roller bearings: Double row cylindrical roller bearings are traveling bearings, and their separability makes installation and disassembly easy. Both ferrules can have a tight fit. Double row cylindrical roller bearings are almost not allowed to have an inclination angle.

 

Single-row bearings N and NU types, N-type bearings have no ribs on the outer ring and ribs on both sides of the inner ring. It allows for axial displacement in both directions between the shaft and the bearing seat. The NU type bearing has ribs on both sides of the outer ring and no ribs on the inner ring. It is also possible to allow axial displacement in both directions between the shaft and the bearing seat. Therefore, this type of structure is suitable for use as a free end bearing.

 

 

NJ, NF type NJ type bearings have ribs on both sides of the outer ring, and ribs on one side of the inner ring. Can withstand a certain amount of unidirectional axial load. The NF type has ribs on one side of the outer ring and ribs on both sides of the inner ring. It can also bear a certain amount of unidirectional axial load. Therefore, this type of structure is suitable for use as a unidirectional axial positioning bearing.

 

NUP, NFP type NUP type bearings have ribs on both sides of the outer ring, a (fixed) single rib on one side of the inner ring, and a detachable flat ring on the other side. Can withstand a certain amount of bidirectional axial load.

 

The NFP type bearing has a (fixed) single rib on one side of the outer ring, a detachable flat rib on the other side, and ribs on both sides of the inner ring. It can also bear a certain amount of bidirectional axial load. This type of structural bearing can limit the displacement of the shaft relative to the bearing seat in both axial directions. Therefore, it is suitable for use as a fixed-end bearing.

 

NN, NNU type NN type bearings have no ribs on the outer ring, ribs on both sides of the inner ring and a middle rib in the middle. It allows axial displacement in two directions between the shaft and the bearing seat. The NNU type bearing has ribs on both sides of the outer ring and a middle rib in the middle, and the inner ring has no ribs. It allows axial displacement in two directions between the shaft and the bearing seat. Therefore, this type of structure is suitable for free end bearings. The cage of this type of bearing mostly uses a machined solid cage.

 

 

The commonly used methods to adjust the radial clearance of full complement cylindrical roller bearings are as follows:

1. The side clearance of cylindrical and elliptical bearing bushes can be adjusted by manual scraping or by grinding and scraping the middle surface of the bearing with padding and turning.

2. The top clearance of cylindrical and elliptical bearing bushes can be adjusted by manual scraping or by adding padding to the middle plane of the bearing when circumstances permit.

3. For fixed bearings with multiple oil wedges, in principle, scraping and adjustment of the bearing gap are not allowed. If the gap is not suitable, a new one should be replaced.

4. For multi-oil wedge tilting bearings, it is not allowed to repair and scrape the pads. If the gap is not suitable, the pads should be replaced. For tiles with adjustable thickness, the amount of tiles can be adjusted by adding a stainless steel pad under the adjustment block behind the tile, or by thinning the thickness of the adjustment block. Note that for multi-oil wedge tiltable bearing pads, the thickness error between pads in the same group should be less than 0.01mm.

 

 

Cylindrical Roller Bearings for FAG are mainly used in large and medium-sized electric motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, reduction gearboxes, rolling mills, vibrating screens, and lifting and transportation machinery.

 

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