Industrial Roller Bearings

Product Details:

Shown in the figures, types EA, C, CD, CA, which are designed for high load capacity, are available. Types EA, C, and CD have pressed steel cages; and type CA has machined brass cages. Type EA has especially high load capacity, features low torque, and has a high-strength cage. An oil groove and holes are provided in the outer ring to supply lubricant and the bearing numbers are suffixed with E4. To use bearings with oil grooves and holes, it is recommended to provide an oil groove in the housing bore, since the depth of the groove in the bearing is limited.

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Our company holds immense experience in this domain and is involved in offering wide assortment of Spherical Roller Bearing.

Features:

• Available in various sizes

• Customized design

• Fine finish

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In order to keep pace with the never ending demands of customers, we are involved into offering wide range of Cylindrical Roller Bearing.

Features:

• Quality tested
• Precisely engineered
• Easy to install

Product Details:

SKF needle roller and cage assemblies are self­-contained, ready-­to­-mount bearings. In applications where the shaft and housing bore can serve as raceways, the assemblies can be used to create bearing arrangements that require minimal radial space.

Bearing Features:

• Lowest cross section among rolling bearings: In applications where less space is available, needle roller and cage assemblies offer a very compact solution.
• High load carrying capacity: Owing to their large number of rollers, needle roller and cage assemblies have a high load carrying capacity.
• High stiffness: Because of their large number of small-diameter rollers, needle roller and cage assemblies have high stiffness.

Product Details:

In bearings of this type, the cylindrical rollers are in linear contact with the raceways. They have a high radial load capacity and are suitable for high speeds.

There are different types designated as NU, NJ, NUP, N, NF (for single-row bearings), NNU, and NN (for double-row bearings depending on the design or absence of side ribs).

The outer and inner rings of all types are separable.

Some cylindrical roller bearings have no ribs on either the inner or outer ring, so the rings can move axially relative to each other. These can be used as free-end bearings. Cylindrical roller bearings, in which either the inner or outer rings has two ribs and the other ring has one, are capable of taking some axial load in one direction Double-row cylindrical roller bearings have high radial rigidity and are used primarily for precision machine tools.

Pressed steel or machined brass cages are generally used, but sometimes molded polyamide cages are also used.

Depending on the existence of ribs on their rings, Cylindrical Roller Bearings are classified into the following types:

• Types NU, N, NNU, and NN are suitable as free-end bearings. Types NJ and NF can sustain limited axial loads in one direction. Types NH and NUP can be used as fixed-end bearings.
• NH-type cylindrical roller bearings consist of the NJ-type cylindrical roller bearings and HJ-type L-shaped thrust collars.
• The inner ring loose rib of an NUP-type cylindrical roller bearing should be mounted so that the marked side is on the outside.

Product Details:

The cone. These bearings are capable of taking high radial loads and axial loads in one direction.

In the HR series, the rollers are increased in both size and number giving it an even higher load capacity. They are generally mounted in pairs in a manner similar to single-row angular contact ball bearings. In this case, the proper internal clearance can be obtained by adjusting the axial distance between the cones or cups of the two opposed bearings. Since they are separable, the cone assemblies and cups can be mounted independently.

Depending upon the contact angle, tapered roller bearings are divided into three types; normal angle, medium angle, and steep angle.

Double-row and four-row tapered roller bearings are also available. Pressed steel cages are generally used.

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Spherical roller bearings have two rows of symmetrical 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.

Bearing Features:

• Accommodate misalignment: Spherical roller bearings are self-aligning like self-aligning ball bearings or CARB bearings.
• High load carrying capacity: Spherical roller bearings are designed to accommodate heavy radial loads, as well as heavy axial loads in both directions.
• Long service life: The rollers are manufactured to such tight dimensional and geometrical tolerances that they are practically identical in a roller set. The symmetrical rollers self-adjust, providing optimal load distribution along the roller length and together with the special profile prevent stress peaks at the roller ends.
• Low friction: Self-guiding rollers keep friction and frictional heat at low levels. A floating guide ring guides unloaded rollers so that they enter the load zone in the optimal position.
• Robust: All SKF spherical roller bearings contain strong window- or prong-type cages.

Product Details:

CARB toroidal roller bearings have one row of long, slightly barrel-shaped symmetrical rollers and torus-shaped raceway profiles. They are non-locating bearings and accommodate exclusively radial loads. CARB bearings are often used to replace the non-locating spherical roller bearing in a locating/non-locating bearing arrangement.

Bearing Features:

• Accommodate misalignment: CARB bearings are self-aligning like spherical roller bearings or self-aligning ball bearings.
• Accommodate axial displacement: CARB bearings compensate for thermal expansion of the shaft like cylindrical or needle roller bearings.
• Wide assortment of dimension series: CARB bearings are available with the same boundary dimensions as corresponding spherical roller bearings, self-aligning ball bearings, cylindrical roller bearings and needle roller bearings.
• Long service life: The special roller profile prevents stress peaks at the roller ends.
• Low friction: Self-guiding rollers keep friction and frictional heat at low levels.
• Improved wear resistance: All CARB bearings are upgraded SKF Explorer bearings.
• Low noise: CARB bearings can reduce noise and vibration levels, for example, in paper machines and fans.

Product Details:

SKF cylindrical roller thrust bearings are designed to accommodate heavy axial loads and impact loads. They must not be subjected to any radial load. The bearings are very stiff and require little axial space.

Bearing Features:

• Separable design: Shaft washer, housing washer, cylindrical roller and cage thrust assembly can be mounted separately.
• Extended bearing service life: To prevent stress peaks, the roller ends are relieved slightly to modify the line contact between the raceway and rollers.

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SKF tapered roller thrust bearings are designed to accommodate heavy axial loads and peak loads. The bearings are very stiff and require little axial space.

Bearing Features:

• Separable design: The shaft and housing washers and the roller and cage thrust assemblies of tapered roller thrust bearings with cages can be mounted separately.
• Low friction: The optimized roller end design and surface finish on the flange promote lubricant film formation, resulting in lower friction. This also reduces frictional heat and flange wear.
• Long service life: Depending on the design, crowned or logarithmic raceway profiles optimize the load distribution along the contact surfaces, reduce stress peaks at the roller ends, and reduce the sensitivity to misalignment compared with conventional straight raceway profiles.
• Consistency of roller profiles and sizes: The rollers incorporated in SKF tapered roller thrust bearings are manufactured to such close dimensional and geometrical tolerances that they are practically identical. This provides optimal load distribution, and reduces noise and vibration.

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Split cylindrical roller bearings are intended primarily for bearing arrangements which are difficult to access or for cranked shafts. It is advantageous to use them in all cases where the maintenance or replacement of non-split bearings would require considerable extra time-consuming effort and would cause long and expensive or even inadmissible machine downtime. Some common applications for split cylindrical roller bearings are cold tube rolling mill (Pilger mill) crankshafts, bucket wheel excavators, conveyor pulleys, rolling mill drive spindles as well as large critical ventilation installations.
SKF now offer a full range of SKF Cooper split cylindrical roller bearings and SKF Cooper split bearing units (including housings). Please visit SKF Cooper for further data

Product Details:

SKF needle roller thrust bearings are fitted with a form-stable cage to reliably retain and guide a large number of needle rollers. Needle roller thrust 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 take up no more space than a conventional thrust washer.

Bearing Features:

• Accommodate heavy axial loads and peak loads: The very small diameter deviation of the rollers within one assembly enables these bearings to accommodate heavy axial loads and peak loads.
• Extended bearing service life: To prevent stress peaks, the roller ends are relieved slightly to modify the line contact between the raceway and rollers.

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SKF drawn cup needle roller bearings have a deep drawn, thin-walled outer ring. Drawn cup needle roller bearings are typically used in applications where the housing bore cannot be used as a raceway for a needle roller and cage assembly, but where a very compact and economical bearing arrangement is required. These bearings are mounted with a tight interference fit in the housing. That enables a simple and economic design of the housing bore, as shoulders or snap rings are not required to locate the bearing axially.

The drawn cup of hardened steel and the needle roller and cage assembly of these bear­ings form a non­-separable unit.

Bearing Features:

• Low cross section: In applications where less space is available, drawn cup needle roller bearings enable downsizing.
• High load carrying capacity and stiffness: Owing to their large number of rollers, drawn cup needle roller bearings have a high load carrying capacity and stiffness.
• Good running properties

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Available with cylindrical or spherical rollers, NSK's thrust roller bearings sustain only axial loads, but they are suitable for heavy loads and have high axial rigidity. Spherical thrust roller bearings contain convex rollers and have a self- aligning capability and are free of any influence of mounting error or shaft deflection. Standard cages are machined brass, where the E-type offers a pressed cage for high load capacity.

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Four-row tapered roller bearings can accommodate combined (radial and axial) loads at low to moderate speeds. They are used almost exclusively in work roll applications such as rolling mills.

Bearing Features:

Depending on their design, four-row tapered roller bearings provide the following main features and benefits:

• Long service life: The four-cup design (four separate outer rings) provides optimal load distribution over all four rows of rollers.
• Enhanced operational reliability: Optimized surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
• Improved wear resistance: In particular, SKF Explorer bearings are made of extremely clean and homogenous steel and undergo a unique heat treatment, which improve the resistance to wear.
• Improved sealing performance with less leakage and less frictional heat: The optimized seal design ensures high protection against external contamination but keeps friction and frictional heat low. This seal design also provides a better retention of lubricant, minimizes environmental impact and reduces maintenance costs.
• Equal load carrying capacity for sealed and open bearings: The optimized and compact seal design enables identical internal design.
• Total bearing interchangeability: Bearings with and without intermediate rings as well as open and sealed bearings are available with identical external dimensions. This allows total bearing interchangeability of current standard design bearings with those without intermediate rings and/or with optimized seal design.
• Separable mounting and simpler inspection: Optimized designs without intermediate rings enable to dismount and separate the cage and roller assemblies and seals. This facilitates mounting, dismounting and also maintenance inspection routines.
• Axial space-saving and cost-effective solution for roll necks: The roll necks can be relatively short, no separate axial bearings are required and identically designed chocks can be used on both sides of the roll.
• Simple axial location on roll necks: Tighter inner ring width tolerances facilitate the tolerancing and dimensioning of surrounding components.

Product Details:

SKF spherical roller thrust bearings have specially designed raceways and asymmetrical rollers. The bearings can accommodate axial loads acting in one direction and simultaneously acting radial loads. The load is transmitted between the raceways via the rollers at an angle to the bearing axis, while the flange guides the rollers.

Bearing Features:

• High load carrying capacity: The large number of rollers, which have an optimum conformity with the washer raceways, enables the bearings to accommodate heavy axial and simultaneously acting radial loads.
• Accommodate misalignment: SKF spherical roller thrust bearings are self-aligning and can accommodate misalignment.
• Separable design: SKF spherical roller thrust bearings are separable, making it possible to mount and dismount the housing washer separately from the shaft washer and roller and cage assembly. In addition this facilitates maintenance inspections.
• High speed capability: The cage designs and the optimum conformity of the rollers with the washer raceways make the bearings suitable for relatively high speeds.
• Long service life: The special roller profile reduces edge stresses at the roller/raceway contact.
• Low friction: The optimized roller end / flange contact keeps frictional heat at low level, even at high speeds.

Product Details:

SKF high-capacity cylindrical roller bearings have the high load carrying capacity of full complement bearings and the high speed capability of bearings with cage. They are designed for applications such as industrial gearboxes, wind turbine gearboxes and mining equipment.

Bearing Features:

• High load carrying capacity: The cage bars are displaced relative to the roller pitch diameter to enable the rollers to be placed closer to each other, creating room for additional rollers.
• High stiffness: The increased number of rollers increases radial stiffness.
• High speed capability: The cage designs are suitable for high speeds, rapid accelerations and peak loads.
• Long service life

The black oxide coating of rings and rollers (designation suffix L4B) contributes to extended service life by improving:

• Smearing damage resistance
• Running-in properties and reducing friction
• Performance under poor lubrication conditions
• Chemical resistance (from agressive oil additives)
• Corrosion resistance

Product Details:

SKF four-row cylindrical roller bearings are available in several designs:

• With a cylindrical or tapered bore
• Open or sealed

 

Four-row cylindrical roller bearings are used almost exclusively for the roll necks of rolling mill stands, calenders and roller presses. Because they are normally mounted with an interference fit on the roll neck, four-row cylindrical roller bearings are well suited for rolling mill applications where the rolling speed is high.

Because four-row cylindrical roller bearings can accommodate only radial loads, they are mounted together with deep groove or angular contact ball bearings, or with tapered roller bearings (either radial or thrust design) which accommodate the axial loads.

 

Bearing Features:

• Exceptional high load carrying capacity: Because of their high number of rollers, four-row cylindrical roller bearings are suitable for very heavy radial loads.
• Low friction: (Roller end / flange contact area) The open flange design, together with the roller end design and surface finish, promote lubricant film formation resulting in lower friction.
• Long service life: The logarithmic roller profile reduces edge stresses at the roller/raceway contact and sensitivity to misalignment and shaft deflection.
• Enhanced operational reliability: The surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
• Separable and interchangeable: The separable components of SKF four-row cylindrical roller bearings are interchangeable. This facilitates mounting and dismounting, as well as maintenance inspections.
• High speed capability: The cage designs are suitable for high speeds, rapid accelerations and peak loads.
• Low cross-sectional height: The low cross-sectional height of four-row cylindrical roller bearings allows for relatively large roll neck diameters compared to the roll diameter.

Product Details:

SKF single row cylindrical roller bearings are available in many designs, series and sizes. The major design differences between the bearings presented in this section are in:

• The cage design and material
• The configuration of the inner and outer ring flanges

 

Bearing Features:

• Low friction: (Roller end / flange contact area)
  The open flange design, together with the roller end design and surface finish, promote lubricant film formation resulting in lower friction and higher axial load carrying capacity.
• Long service life: The logarithmic roller profile reduces edge stresses at the roller/raceway contact and sensitivity to misalignment and shaft deflection.
• Enhanced operational reliability: The surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
• Separable and interchangeable: The separable components of SKF cylindrical roller bearings are interchangeable. This facilitates mounting and dismounting, as well as maintenance inspections.
• High speed capability: The cage designs are suitable for high speeds, rapid accelerations and peak loads.

Product Details:

SKF cylindrical roller bearings are available in many designs, series and sizes. The major design differences between the bearings presented in this section are in:

• The number of roller rows (one, two or four)
• The type of cage (with, without or special designs)
• Bearings with cage can accommodate heavy radial loads, rapid accelerations and high speeds.
• Full complement bearings (without cage) incorporate a maximum number of rollers and are therefore suitable for very heavy radial loads at moderate speeds.
• SKF high-capacity cylindrical roller bearings combine the high load carrying capacity of a full complement bearing with the high speed capability of a bearing with cage.
• The configuration of the inner and outer ring flanges (position and number of guide flanges)

 

Bearing Features:

• High load carrying capacity
• High stiffness
• Accommodate axial displacement: Except for bearings with flanges on both the inner and outer rings.
• Low friction: (Roller end / flange contact area)
  The open flange design, together with the roller end design and surface finish, promote lubricant film formation resulting in lower friction and higher axial load carrying capacity.
• Long service life: The logarithmic roller profile reduces edge stresses at the roller/raceway contact and sensitivity to misalignment and shaft deflection.
• Enhanced operational reliability: The surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
• Separable and interchangeable: The separable components of SKF cylindrical roller bearings are interchangeable. This facilitates mounting and dismounting, as well as maintenance inspections.

Product Details:

NSK Super Precision Cylindrical Roller Bearings are designed specifically to handle large radial loads in high-speed spindle applications that demand high running accuracy (runout) of bearing-spindle arrangements.

Features:

• This lineup of bearing includes a basic series that meets ISO standards and a specified series targeting machine tools.
• A double-row cylindrical roller bearing series is available for applications requiring high rigidity. A single-row cylindrical roller bearing series is available for applications requiring high-speed performance.
• A Robust series of high performance bearings is available for applications requiring both high-speed and high-rigidity performance.

Product Details:

SKF needle roller bearings with machined rings are made of carbon chromium bearing steel. SKF supplies these bearings with or without flanges on the outer ring, in a wide range of series and sizes. SKF also supplies them with or without an inner ring.

Bearing Features:

• Low cross section: In applications where less space is available, needle roller bearings offer a very compact solution.
• High load carrying capacity: Despite their low cross sectional height, they have a high load carrying capacity.
• Separable design: The possibility of assembling inner and outer rings separately permits interference fits for shaft and housing and also enables easy maintenance inspections.
• High stiffness: Owing to their large number of small-diameter rollers, needle roller bearings with machined rings have high stiffness.
• Accommodate axial displacement: Except for bearings with flanges on both the inner and outer rings, needle roller bearings with machined rings can accommodate axial displacement.