Cylindrical Roller Bearings

Cylindrical roller bearings feature high radial load capacity because the rollers and raceway are in linear contact. These bearings are suitable for applications that involve heavy radial and impact loading. They are also appropriate for high-speed applications in that they can be machined very accurately due to their structure. Having a separable inner ring or outer ring, these bearings can be mounted and dismounted easily.

Single-row cylindrical roller bearings:
The NU and N types exhibit their best performance when used as free side bearings since they adjust to the shaft's axial movement, to a certain extent, relative to the housing position. The NJ and NF types carry axial load in one direction, while the NUP and NH types can carry a certain degree of axial load in both directions.
Type R cylindrical roller bearings feature enhanced load rating compared with standard series, though both have equal dimensions. This is because type R bearings have different interior design. They are identified by supplementary code "R" .

Double-row cylindrical roller bearings:
Double-row cylindrical roller bearings come in two types: with a cylindrical bore, and with a tapered bore. As for those with a tapered bore, the specified amount of clearance can be obtained by adjusting the press-in distance. Some bearings have lubrication holes and lubrication grooves on the outer ring. They are identified by supplementary code "W" .
These bearings can accommodate high radial loads, and are often used on machine tool spindles.

Machine Bronze Retainer:
-Higher operating speed
-Reduced vibration/quiet operation
High Radical Load Capacity
-Accommodates heavy radical and impact loading

Separable Inner Ring or Outer Ring:
-Simplifies mounting/dismounting
R Type
-Increased load rating capacity

NJ Type:
-Carries axial load in one direction

NU and N Type (free Side Bearings):
-Adjust to the shaft's axial movement relative to the housing position

Full complement type cylindrical roller bearings for crane sheaves:

Crane rope sheaves and running wheels which are operated at low or medium speed are generally equipped with full complement type cylindrical roller bearings because the operation of these machines involves heavy, impact loading.
These bearings are divided into shielded and open types. The shielded type is often used with the outer ring rotation.

Shielded type:
The shielded type was developed for use with rope sheaves. It is shielded, non-separable and pre-lubricated with grease. Bearings with locating snap rings around the outer ring can be positioned and fit to sheaves with ease. The bearing surface is coated with phosphate for rust prevention.

Open type:
Open type bearings are further divided into those used on the fixed side and those used on the free side. The former carry axial load in both directions. The relative position of the latter's inner ring and outer ring can be adjusted by moving them along the axis.
Open type bearings are separable because the outer ring divided into two annular pieces in a plane perpendicular to its axis. Triple-row and four-row bearings are available along with double-row types.