Most of LYC cylindrical roller bearings are separable which make it very convenient to mount and dismount. Cylindrical roller bearings can carry heavier radial load and are suitable to be used in the condition of high speed.

This type of bearings only can allow a small angular error between inner axes and outer axes in the range of 2 ～ 4. Therefore it requires higher machined precision on shaft and housing; otherwise asymmetrical load and stress would be focused at the position of raceway. However this situation can be improved by correcting the contacted generatrix of rollers or raceways.

 According to different rows LYC cylindrical roller bearings are divided into single row double-row and multi-row cylindrical rollers. These differences are also displayed on the design of flange position. The common used types of LYC cylindrical roller bearings are as following.

Single-Row Cylindrical Roller Bearings

Type N NU

Bearings of type N have two integral flanges on inner ring and a flangeless outer ring. This type of bearings permits axial displacement in double directions of the housing relative to the shaft.

The bearings of type NU have two integral flanges on outer ring and a flangeless inner ring. This type of bearings permits axial displacement in double directions of the housing relative to the shaft.

Therefore this type of bearings is suitable to be used as non-locating bearings.   

Type NJ NF

Bearings of type NJ have two integral flanges on outer ring and one on inner ring. This type of bearings can carry a certain amount of axial loads in single direction.

Bearings of type NF have one flange on outer ring and two integral flanges on inner ring. This type of bearings can carry a certain amount of axial loads in single direction.

Therefore they are suitable to be used as an axial location bearing in single direction.

Type NUP NFP

Bearings of type NUP have two integral flanges on outer ring one flange and separable loose flange on inner ring. This type of bearing can carry a certain amount of axial loads in double directions.

Bearings of type NFP have one flange a loose flange on outer ring and two integral flanges on inner ring. This type of bearing also can carry a certain amount of axial loads in double directions.

This type of bearings can limit the displacement in double directions of the housing relative to the shaft.

Therefore they are suitable to be used as an locating bearing.

Type NH (NJ+HJ)

Bearings of type NH are combined by the bearing of type NJ and the bearing of type HJ with catercornered flange. Comparing to NUP type with short flange ring and non-locating loose flange Type NH can take the advantage of the whole inner ring width of NJ to match with axes tightly. Moreover its quite convenient to mount and dismount.

This type of bearing can limit axial displacement in double directions of the housing relative to the shaft. Therefore they are suitable to be used as a locating bearing.

Double-Row Cylindrical Roller Bearings

LYC Double-row cylindrical roller bearings are divided into bearings with cylindrical inner bore and tapered inner bore (added K behind bearing type). This type of bearing has these advantages such as compact structure good rigidity heavy load carrying capacity and little distortion under loads. Consequently its applicable for the machine tool spindle. Tapered inner bore could fine adjust clearance simplify positioning fixture and be convenient to mount and dismount.

Type NN NNU

Bearings of type NN have two integral flanges on inner ring a flangeless outer ring and a centre flange in the middle. This type of bearings permits axial displacement in double directions of the housing relative to the shaft.

Bearings of type NNU have two integral flanges on outer ring a non-contacting inner ring and a centre flange in the middle. This type of bearings permits axial displacement in double directions of the housing relative to the shaft.

Therefore this type of bearings is suitable to be used as non-locating bearings.

Type NNF

Bearings of type NNF are one kind of double-row cylindrical roller bearings full of rollers which is consist of outer ring with a center flange two inner rings with double flanges. Rollers are guided by flanges on inner ring and two inner rings are fixed up by fastening ring. This structure can carry not only a lot of heavy radial load and axial load but also tilting moment. Therefore they are suitable to be used as non-locating bearings.    

Bearings of type NNF have contact seals at two sides. And it is filled in grease lubricant. The working temperature would be -50℃~+110℃.However after considering of seal material available working temperature shall be -40℃~+80℃. Under appropriate conditions sealed NNF bearing need little maintenance and could be kept long time in water vapor or polluted environment. When mid or high speeding bearing can got make-up lubricating through lubrication groove and bore.

Four-Row Cylindrical Roller Bearings

LYC four-row cylindrical roller bearings are mainly used for rolling mill like cold hot rolling mill and blooming mill. The bearing is separable i.e. The rings and rolling elements could be separated. Therefore it is convenient to wash check mount and dismount.

Type FC

The bearings of type FC are consisted of two outer rings and one inner ring which have two integral flanges on outer rings a center flange in the middle and a flangeless inner ring.

Type FCD

Essentially type FCD bearing is consisted of two type NN bearings.

Type FC and FCD bearing can permit axial displacement in double directions of the housing relative to the shaft

Therefore they are suitable to be used as non-locating bearings. Normally their cages is made by solid machined cage.

Cages

Most cages for LYC single row cylindrical roller bearings are pressed steel cages or machined brass cages. According to different working conditions and customers requirements cages with other design and structure could be supplied.