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Cylindrical Roller Bearings

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Cylindrical Roller Bearing

Cylindrical Roller Bearings square measure bearing during which cylinders square measure used because the rolling parts as against balls in ball bearings. As such, the rollers have a larger (linear) contact space with the outer ring and square measure distribute hundreds across a broader surface. afterward, they need a comparatively high radial load capability and square measure appropriate for top speeds. Double-row cylindrical roller bearings have high radial rigidity and square measure used primarily for exactitude machine tools.

Depending on the series as outlined below variety of cylindrical roller bearings don't have any ribs on either the inner or outer ring, that the rings will move axially relative to every alternative which may be used as free-end bearings.

Pressed steel (with or while not tins or fins) or machined brass cages square measure usually used, however typically formed polymer cages are offered looking on the applying. Cylindrical Roller Bearings are offered while not cages with a manpower of rollers. this enables even higher hundreds however at the expense of speed.

Single row cylindrical roller bearings are factory-made with carabiner grooves on the outer rings. This style simplifies the bearing joint because the bearings square measure placed into the housing by means that of the snap rings. The carabiner groove and snap rings square measure in accordance with IS0 464.

There square measure differing types selected letter of the alphabet, NJ, NUP, N, NF for single-row bearings, and NNU, NN for double-row bearings looking on the planning or absence of facet ribs. AST’s cylindrical roller bearings are available in the subsequent series with varied cage styles and Metric dimensions:


N Series - Bearings of N style square measure single row cylindrical bearing and have 2 mounted ribs on the inner ring that retain the rollers and cage and one swish outer ring. This style permits associate degree axial displacement in bound limits, of the shaft in respect to the housing. Therefore, N Series rolling bearings square measure utilized in non-locating bearing units. Also, the N Series bearings have nearly no thrust capability.


NU Series - square measure single row cylindrical roller bearings and have 2 mounted ribs on the outer ring and one swish inner ring. This style permits associate degree axial displacement in bound limits, of the shaft in respect to the housing. Therefore, letter of the alphabet Series rolling bearings square measure utilized in non-locating bearing units. Also, the letter of the alphabet Series bearings don't have any nearly thrust capability.

NJ Series - square measure single row cylindrical roller bearings and have 2 mounted ribs on the outer ring and a hard and fast rib on the inner ring which may guide the shaft during a single direction (axially).


NUP Series - square measure single row cylindrical roller bearings and have 2 mounted ribs on the outer ring and, on the inner ring, a hard and fast rib and a support washer. this fashion they will be used as locating bearings, guiding the shaft axially in each directions.

RNU Series - square measure single row cylindrical roller bearings and have 2 mounted ribs on the outer ring and has no inner ring. Instead, it uses the shaft because the opposing raceway.

NF Series - additionally ready to carry incidental thrust hundreds, this bearing sort options 2 integral ribs on the inner ring and one rib on the outer ring.


NN Series - Bearings of NN style square measure double row cylindrical bearing and have 3 mounted ribs on the inner ring that retain the rollers and cage and one swish outer ring. This style permits associate degree axial displacement in bound limits, of the shaft in respect to the housing. Therefore, N Series rolling bearings square measure utilized in non-locating bearing units. Also, the NN Series bearings don't have any nearly thrust capability.


NNU Series - square measure double row cylindrical roller bearings and have 3 mounted ribs on the outer ring and one swish inner ring. This style permits associate degree axial displacement in bound limits, of the shaft in respect to the housing. Therefore, letter of the alphabet Series rolling bearings square measure utilized in non-locating bearing units. Also, the NNU Series bearings don't have any nearly thrust capability.

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