Home » Ball Bearings

 


Roller Bearings




Cylindrical Roller Bearings
Cylindrical Roller Bearings :

Bearings with a cage can accommodate heavy radial loads, fast accelerations and high speeds. Full complement bearings incorporate a maximum number of rollers and are therefore suitable for very heavy radial loads at moderate speeds. Cylindrical roller bearings combine the high load carrying capacity of a full complement bearing with the high speed capability of a bearing with a cage.

SKF cylindrical roller bearings have two integral flanges on either the inner or outer ring to guide the rollers. The bearings have “open” flanges, i.e. the inward face of the flange is inclined by a defined angle. The flange design, together with the roller end design and surface finish, promote the formation of a lubricant film to reduce friction and frictional heat.

 

Needle Roller Bearings
Needle Roller Bearings :

Needle roller bearings are roller bearings with cylindrical rollers that are small in diameter. In spite of their low cross section, needle roller bearings have a high load carrying capacity and are therefore extremely suitable for bearing arrangements where radial space is limited. SKF supplies needle roller bearings in different designs and a wide range of sizes, which are appropriate for different applications.

 

Tapered Roller Bearings
Tapered Roller Bearings :

Tapered roller bearings have tapered inner and outer ring raceways and tapered rollers. They are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads. The projection lines of the raceways meet at a common point on the bearing axis to provide true rolling and low friction. The axial load carrying capacity of tapered roller bearings increases with increasing contact angle. Tapered roller bearings are produced by SKF in many designs and sizes to match their many uses.

 

Spherical Roller Bearings
Spherical Roller Bearings :

Spherical roller bearings have two rows of rollers, a common sphered outer ring raceway and two inner ring raceways inclined at an angle to the bearing axis. The centre point of the sphere in the outer ring raceway is at the bearing axis. Therefore, the bearings are self-aligning and insensitive to misalignment of the shaft relative to the housing, which can be caused, for example, by shaft deflection. Spherical roller bearings are designed to accommodate heavy radial loads, as well as heavy axial loads in both directions.

 

CARB Toroidal Roller Bearings
CARB Toroidal Roller Bearings :

CARB toroidal roller bearings combine the self-aligning capability of spherical roller bearings with the axial displacement ability of cylindrical roller bearings. CARB bearings can also have the compact cross section and high load carrying capacity normally associated with needle roller bearings.

CARB bearings are intended exclusively as non-locating bearings. They can simplify the bearing arrangement design for shafts that are subjected to thermal expansion/contraction because axial displacement is accommodated within the bearing, virtually without friction. Bearing systems consisting of a spherical roller bearing in the locating position and a CARB bearing in the non-locating position provide a space and weight-saving bearing system with a low cost of ownership. CARB bearings can reduce noise and vibration levels, e.g. in paper machines and fans. CARB bearings are single row bearings with long, slightly barrel-shaped symmetrical rollers.

 

Cylindrical Roller Thrust Bearings
Cylindrical Roller Thrust Bearings :

Cylindrical roller thrust bearings are suitable for arrangements that have to support heavy axial loads. Furthermore, they are relatively insensitive to shock loads, are very stiff and require little axial space. As standard they are available as single direction bearings and can only accommodate axial loads acting in one direction. Cylindrical roller thrust bearings are simple in form and design and are produced in single row and double row designs. The cylindrical surface of the rollers is slightly relieved towards the ends. The resulting contact profile virtually eliminates damaging edge stresses. The bearings are of separable design; the individual components can be mounted separately.

 

Needle Roller Thrust Bearings
Needle Roller Thrust Bearings :

SKF needle roller thrust bearings are fitted with a form-stable cage to reliably guide and retain a large number of needle rollers. The diameter deviations of the rollers within one assembly are within 2 µm, enabling these bearings to accommodate heavy axial loads and shock loads. These bearings provide a high degree of stiffness within a minimum axial space. In applications where the faces of adjacent machine components can serve as raceways, needle roller thrust bearings will take up no more space than a conventional thrust washer. They can accommodate axial loads acting in one direction only.

 

Tapered Roller Thrust Bearings
Tapered Roller Thrust Bearings :

Tapered roller thrust bearings enable axially very compact bearing arrangements to be produced which can carry very heavy axial loads, are insensitive to shock loads and are stiff. SKF produces single direction tapered roller thrust bearings and double direction tapered roller thrust bearings. The screw-down bearings) constitute a special design of single direction tapered roller thrust bearing and have a full complement of rollers. They are used for rolling mill screw-down arrangements. SKF tapered roller thrust bearings are produced with the logarithmic contact profile between raceways and rollers to guarantee optimum stress distribution in the bearing, thus enhancing bearing life.

 

Spherical Roller Thrust Bearings
Spherical Roller Thrust Bearings :

SKF spherical roller thrust bearings have specially designed raceways and accommodate a large number of asymmetrical rollers. The rollers have an optimum conformity with the washer raceways to optimize load distribution along the roller length. Therefore, they can accommodate relatively high speeds, heavy axial loads in one direction and heavy radial loads. The load is transmitted between the raceways at an angle to the bearing axis. Spherical roller thrust bearings are self-aligning and insensitive to static misalignment of the shaft relative to the housing.