Cylindrical Roller Bearing

Double Row Full Complement Cylindrical Roller Bearings

Cylindrical roller bearings, also known as a rolling bearing, carry a load by placing rolling elements (such as balls or rollers) between two bearing rings called races. The cylindrical roller bearings have a high radial load capacity and are suitable for high speeds. They vary according to the number of rows of rollers (usually one, two, or four) and if there’s a cage or not. No cage allows for the bearing to have more rows, which helps support even heavier radial loads.
Cylindrical roller bearings are used in a variety of applications. Examples include mining, petroleum production, power generation, transmission, cement processing, aggregate crushing, and metal recycling. Some cylindrical roller bearings are used in briquetting machines, rubber mixing equipment, rolling mills, rotary dryers, or pulp and paper machinery. Others are used in construction equipment, crushers, electric motors, blowers and fans, machine tools, traction motors and pumps.
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Double Row Full Complement Cylindrical Roller Bearings

A double row complete complements cylindrical roller bearing is a cylindrical roller bearing. Double row full complement cylindrical roller bearings are designed to withstand heavy loads. Under the same width, this kind of bearing has a very high load carrying capacity compared with the traditional bearing with a cage. Double row full complement cylindrical roller bearings can withstand large radial loads and axial loads and resist overturning moments. The radial section is small, it can save space, but the speed is relatively low. Therefore, the length is used as a fixed bearing. If several bearings are installed on a shaft, the outer ring can have different rotation speeds because the outer ring is narrower than the inner ring. This is somewhat suitable for the pulley mechanism. To make the pulley easy to fix to the outer ring of the bearing, there are annular grooves on both ends of the outer ring that can be fitted with elastic retaining rings.

Double row full complement cylindrical roller bearings are all supplied with a lubrication groove with holes in the outer ring, which enables full lubrication access into the rolling space of each row of cylindrical rollers. The inner circle of the NNC, NNCL, and NNCF design has three guiding flanges to ensure the guiding accuracy of cylindrical rollers. They differentiate by the number of guiding flanges and snap rings in the outer ring. These components stop the rolling elements from falling out.

NNC
One side of the outer ring is equipped with a guiding flange; the other side has a snap ring to keep the cylindrical rollers. These bearings can carry the axial load in both directions.

NNCL
NNCL bearings have flangeless outer rings; therefore, specific axial bearing rings’ displacement against each other is accommodated.

NNCF
The outer ring has one flange and one snap ring. These components accommodate axial load transfer in one direction and certain shaft displacement of the housing.

NNF
NNF bearings are produced with guiding flanges in the two-piece inner ring, held together by a retaining call. The outer ring has a guiding flange. These bearings can also carry the axial load in both directions, and as per more considerable distance between individual rows of cylindrical rollers, they can transfer tilting moments. The outer ring of an NNF bearing is 1 mm narrower than the inner ring and has two snap ring grooves. These bearings are supplied as standard with seals on both sides, and the internal space is filled with grease to enable the bearing operation in standard working conditions up to 110°C.