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Cylindrical roller bearings have high radial-load capacity and moderate thrust loads. They contain rollers which are cylindrically-shaped, but are not true cylinders. Instead, these rollers are crowned or end-relieved to reduce stress concentrations. This geometry results in low friction and allows for high-speed applications. Cylindrical roller bearings are commonly available in precision grades such as RBEC-5, a classification from the Roller Bearing Engineers Committee (RBEC). RBEC ratings describe the accuracy and tolerance range for different types of bearings. As a rule, the higher the RBEC number, the tighter the bearing tolerances. Typically, cylindrical roller bearings are lubricated with oil, which also serves as a coolant.
Most cylindrical roller bearings are made of alloy steels or low-carbon steels. Some applications require the use of case-hardened or thorough-hardened, high-carbon, bearing-quality steel. High-carbon grades of steel do not require carburizing and can be case-hardened by induction heating or thorough-hardened by conventional heating methods. When low-carbon, carburized grades of steel are used, carbon is introduced after the cylindrical roller bearings are machined to a depth sufficient to produce a hardened case that can sustain bearing loads. The addition of carbon and alloys ensures the proper combination of a hard, fatigue-resistant case and a tough, ductile core.
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Small bore MT bearings improve your design and lower manufacturing costs of manipulators, articulating arms, lift-assists, and balancers. If you develop and manufacture ergonomic lift-assist devices, work positioners, and articulating arms, there’s a Kaydon bearing that can increase your design flexibility. It’s a bolt-up bearing in popular compact sizes, and it eliminates the limitations imposed by traditional king post configurations so only one bearing is required in your assembly instead of two.
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Cylindrical roller bearings have the following key features:
- Single-row (design variants N, NJ, NU and NUP) and double-row (design variants NN and NNU) available
- Cage variants: brass (M6, MA6), polyamide (TVP3), and pressed steel (J - coming soon)
- Suitable for high radial loads
- High speed ratings
- Simple mounting due to the possibility to fit inner and outer rings separately
- Full complement versions available for even higher radial loads
- Standards: DIN 616, DIN 5412 (part 1)
- Application examples: industrial gearboxes, mechanical presses, electrical motors, pumps and compressors, traction motors and axle boxes for railway vehicles, steel mills, etc.
The new NKE series single row cylindrical roller bearings offers unlimited possibilities for your applications. Currently more than 3,000 types of this series are produced in Steyr using a new modular component assembly system. This ensures shortest lead-times for your orders.
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Catalog sizes and engineered to order bearing designs are readily available.
RBEC 5 Precision Class Capacity
Extra Capacity Designs
Multiple Retainer Designs Available
High Temperature Designs Available
Special Features: Notches; Slots; Aligning Features; Carburizing Grade Materials.
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Cylindrical roller bearings (single row)
cage designs: sheet steel cage, TB cage, brass cage or cage of glass-fibre reinforced polyamide 66
special lubrications are possible apart from standard lubrication
bearings are available on request with annular groove with or without retainer ring
various radial clearance groups are available
tapered bores are possible too
designs in tolerance classes P6, P5, P4 are possible
Cylindrical roller bearings (double row)
cage design: brass cage
standard clearance is C1
therefore bearings are not exchangeable
bearings have a special tolerance class HP (high precision)
bearings have a standard tapered bore
On request every outer ring can be supplied with a lubricating nut and lubricating holes.
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Construction of this roller bearing type is the simplest of all radial roller bearings. This bearing type is often used in high-speed applications. Because the inner ring, outer ring, and rollers are in line contact, this bearing type has a large radial load capacity. Various Cylindrical roller bearing configurations are:
N,NJ,NF,NU,RNU : integral ribs (flanges)
NH,NP;NUP;NUH : integral and loose ribs
NN,NNU : double-row bearings
Configurations having integral flanges or loose ribs on both the inner and outer rings can sustain a asmall amount of axial load. Since this bearing type supports axial loads as sliding action between the end of the rollers and flange faces, axial loading is Limited. Double-row Cylindrical roller bearings are used for high-speed, high-accuracy applications such as; main spindle support for lathes, milling machines, machining centers.
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RKB double row taper roller bearings can take up heavy loads.
The basic styles are two row converging TDI configuration and two row diverging TDO configuration.
RKB bearings in TDI configuration have a double cone assembly and two single cups and they are generally supplied with a cup spacer.
The cup spacer is face ground after accurate measurement of the distance to obtain a predetermined internal play. Spacers or components may not be interchanged.
RKB also produces the taper roller steep contact angle TDIS version with higher thrust capacity than the TDI type.
These TDIS bearings have combination of face slots (e.g. N, N1, N2) and bore key-way for locking the cone on the shaft.
Also helical groove in the bore and lubrication grooves in side faces of double cone and/or retention sleeve with annular groove and lubrication holes can be provided.
RKB bearings in TDO configuration have a double cup, two single cone assemblies and can be supplied with a shaft supported cone spacer.
The TDO style bearings are mainly used in a floating cup mounting. Additional features of a lubrication groove and oil holes in the double cup for simplified lubrication through the outer ring are included (suffix CD).
In the TDO type the contact angle diverges, so the rigidity of the shaft mounting is increased.
Bearing sets with steep contact angle and intermediate ring, pierced rollers and steel pin-type cage (TDOS design), bearing sets with extended inner rings which abut each other (TDONA and TDONASW designs), bearing sets with heavy wall cup (TNASWH design) and bearing sets with shields of pressed steel (TDO 4422 design) are also in RKB manufacturing program.
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Double-row Tapered Roller Bearings
Two single-row cups end one double cone; one double cup and two single-row cones.
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KH series bearings are designed to provide precise positioning and stopping, with consistent repeatability, in applications where rotation is constant, intermittent or oscillating. They are the ideal bearing for advanced rotary index tables or any design where the bearing will mesh with other precision mechanical components.
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ROLLWAY manufactures a wide variety of roller bearing products ranging in size from 1" inside diameter to 42" outside diameter. We can provide high-volume standard catalog products and low-volume engineered solutions to solve your toughest application problems.
We manufacture a complete line of standard cylindrical radial, cylindrical thrust, tapered thrust, and steel cage journal bearings. In addition, ROLLWAY also manufactures many sizes of both radial and thrust bearings for special applications, in sizes up to and including 42" outside diameter.
ROLLWAY%u2019s advanced engineering, metallurgical, and manufacturing departments are available to assist in solving complex bearing design problems. The personnel in our engineering and sales offices are available for advice and consultation.
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Needle Roller Bearing series includes needle roller bearings featuring a low sectional height and high precision, and various other bearings for rotating motion.
A wide range of products prepared in our large variety and small lot production system and supplied through our sales network dedicated to customer service, meet the customer's needs in every industrial sector, and contribute to down sizing and resource saving of machines and equipment. Out of our many thousand kinds of products, we will introduce you to some typical examples of Needle Roller Bearing series.
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Nadella can look back on its experience of many years in the production of precision antifriction bearings. In addition Nadella has the suitable production possibilities for smaller, middle and large series and thus the ability to compile and realize related to customers problem solutions.
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IKO Needle Roller Bearing series includes needle roller bearings featuring a low sectional height and high precision, and various other bearings for rotating motion. A wide range of products prepared in our large variety and small lot production system and supplied through our sales network dedicated to customer service, meet the customer's needs in every industrial sector, and contribute to down sizing and resource saving of machines and equipment. Out of our many thousand kinds of products, we will introduce you to some typical examples of IKO Needle Roller Bearing series.
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Needle roller bearings are small in sectional height, therefore useful in making machinery smaller and lighter. This type of bearing is used in a wide range of machinery, such as automobiles, motor cycles, electric machines, machine tools, aerospace and office equipment.
Needle roller bearings are compact, highly rigid and superior in load carrying performance, compared with other types of bearings. Excellent for carrying oscillating loads; contains many small diameter rollers.
Widely employed in stud type and yoke type track rollers used as guide rollers in cam mechanisms or linear motion units.
Also used in miniature one-way clutches in the clutch mechanisms of office equipment, such as copying machines.
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McGill has a broad variety of heavy-duty needle bearings with two series to choose from: CAGEROL & GUIDEROL Bearings.
CAGEROL Cage Type Needle Bearings are designed to accommodate higher speeds and some misalignment. Crowned rollers help increase the load rating of the bearings and steel cages provide accurate roller guidance.
GUIDEROL Heavy-Duty Needle Bearings with center guided rollers utilize a full complement of rollers extending virtually the complete width of the outer race for maximum support. They are designed to provide higher static load capacities and more radial rigidity in applications involving gears, rollers, sheaves, levers, etc.
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Needle roller bearings are roller bearings with cylindrical rollers which are thin and long in relation to their diameter. They are referred to as needle rollers. In spite of their low cross section the bearings have a high load carrying capacity and are thus extremely suitable for bearing arrangements where radial space is limited.
The SKF range of needle roller bearings is extensive and, in addition to customized designs, it comprises the following types:
- Needle roller and cage assemblies
- Drawn cup needle roller bearings with open ends and with closed end.
- Needle roller bearings with and without flanges with and without inner ring
- Sealed needle roller bearings with and without inner ring.
- Alignment needle roller bearings with and without inner ring
- Inner rings for needle roller bearings.
- Combined needle roller bearings (separate section). Needle roller/angular contact ball bearings.
Needle roller/thrust ball bearings.
Needle roller/cylindrical roller thrust bearings.
- Needle roller thrust bearings (separate section).
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Link-Belt® Cylindrical Roller Bearings
Standard narrow, wide and intermediate width series
Shaft sizes up to 280mm
High capacity designs
Full complement and retainer designs including formed steel, segmented steel and polymeric
Manufactured to Industry Standards
Link-Belt® Adapter Mounted Spherical Roller Bearings
LER seal is standard
D5 Pentac auxiliary seal
D8 taconite duty auxiliary seal
Adapter mounting and press fit
H7 bearing/housing fit
Industry standard SAF interchangeable
Caps have grade 5 bolts
Precision dowel holes to position unit for consistent mounting
Center support bar in base provides extra support for shock loads
Pry slots in cap for easy removal
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SL Series
SL1818 200mm~800mm
SL1829 200mm~800mm
SL1830 200mm~800mm
SL1822 200mm~800mm
SL1923 200mm~800mm
ZSL1923 200mm~800mm
SL1850 200mm~800mm
SL0148 200mm~800mm
SL0149 200mm~800mm
SL0249 200mm~800mm
SL0450...PP 200mm~800mm
SL04...PP 200mm~800mm
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CEROBEAR hybrid spindle roller bearings open up a significant improvement in the design of spindle systems. They present the optimal solution for the floating bearing side of a spindle shaft. Therefore they are an ideal supplement to spindle ball bearings which require a large amount of engineering efforts if used on the floating side.
Their numerous advantages over conventional spindle bearings make CEROBEAR hybrid spindle roller bearings an economic and high-quality solution in a number of fields of use.
The bearings are produced according to highest precisions. They consist of rings manufactured from high-grade rolling bearing steel and rolling elements made from silicon nitride. Various high-performance plastics such as PEEK or PI are used for the cages.
CEROBEAR hybrid spindle roller bearings are characterised by the following properties:
■ high speeds
■ high reliability
■ high precision
■ high stiffness
■ low friction
■ simple design
■ long service life
■ low operating costs
CEROBEAR hybrid spindle roller bearings are manufactured in ISO dimensions or in customized designs for your specific application.
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SPHERE-ROL® Bearings are available in two standard series:
22200 series, 20mm to 150mm bore sizes
22300 series, 40mm to 100mm bore sizes
SPHERE-ROL® Bearings are the industry's only "off the shelf" sealed spherical roller bearing series that are dimensionally interchangeable with conventional double row spherical roller bearings.
Single-row of large rollers result in increased dynamic load capacity and up to 100% greater misalignment of conventional double row spherical roller bearings.
Potential extended bearing life as a result of three different sealing options available:
NYLAPLATE ® seal
Combination labyrinth / contact seal with low running friction.
NYLAPLATE high temp seal
High temperature material combination labyrinth / contact seal for high temperature applications or where chemicals may be present.
LAMBDA® seal
Sealing features of NYLAPLATE are combined with the lip-wiping sealing function of an added contact seal, for applications where contamination conditions are particularly severe or where substantial amounts of moisture are present.
Available with cylindrical bore or tapered bore.
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Cylindrical roller bearings
CARB® toroidal roller bearings
Spherical roller thrust bearings
Backing bearings for cluster mills
Combined cylindrical roller/taper roller bearings
Spherical roller bearings
Cylindrical roller thrust bearings
Indexing roller units
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Spherical roller bearings are bearings for highest loads and contain two rows of symmetric barrel-shaped rollers which adjust automatically without force in the hollow-ball outer raceway.
Based on this design, shaft deflections and alignment errors can be compensated.
Spherical roller bearings are provided with the maximum number of rollers with highest diameter and high length.
Uniform stress distribution and high load-carrying capacities are archieved by the close osculation between rollers and raceways.
The standard designs of SLF spherical roller bearings are E designs, thus E will not be written separately.
Spherical roller bearings are provided with cylindrical and conical bores. In addition, they are provided with an lubrication ring groove and lubrication bores at the outer race without any additional identification being made.
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These bearings stand radial and thrust loads but axially in one direction only.
They are available with different contact angles as per specs ISO 355.
For heavy industries, multiple two or four rows bearings are available, metric and inch sized.
For easy assembly in blind configuration, with precise adjustment of the internal clearance, there can be available matched sets of two bearings with spacer.
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These bearings will stand thrust and radial loads and because self-aligning, they absorb the bending deviation of the shaft.
Easy assembly because separable.
Suggested oil lubrication and minimum load dependent on speed has to be taken into consideration for satisfactory running.
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SNR has conducted joint research plans with its steel suppliers, focusing on steel quality evolution; now, the company uses special alloys featuring the utmost cleanliness level. This new steel quality, generalised on our spherical roller bearings, provides higher performance and endurance than the other steel grades used so far.
Furthermore, the heat treatment which is especially applied to the SNR spherical roller bearings guarantees dimensional stability up to 200 °C. The quality of this treatment results in higher endurance and higher ultimate strength and wear resistance of the bearings, allowing them to sustain the most aggressive operating conditions.
Therefore, the combined evolution of the materials and technologies gave rise to an 18 % increase in the dynamic load capacity of the SNR spherical roller bearings, as well as a 75 % service life extension, making our bearings the best performers on the market, while remaining within the same ISO standardisation envelope and in compliance with the ISO standard for basic dynamic load calculation.
Application examples: Rolling mill cages, large reduction gears, large industrial fans, printing press cylinders, quarry machines…
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Spherical roller bearings are double row, self-retaining units comprising solid outer rings with a concave raceway, solid inner rings and barrel rollers with cages. The inner rings with cylindrical or tapered bores.
The symmetrical barrel rollers freely align themselves to the concave outer ring raceway. As a result, shaft deflections and mislignments of the bearing seats are compensated.
X-life
Many sizes of spherical roller bearings are supplied in X-life design. These bearings do not have a central rib on the inner ring so longer barrel rollers can be fitted; improved kinematics, optimised surfaces and even higher performance materials are possible. As a result, the bearings show a significant increase in the basic dynamic load rating and, under the same operating conditions, in the basic rating life. In certain applications, a smaller design of bearing arrangement can therefore be used if necessary.
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Spherical roller bearings are principally provided with two rows of symmetrical spherical rollers and a common sphere raceway in out ring, the two inner ring raceways are included at an angle to the bearing axial. The bearings have good self-aligning ability and can operate when the shaft deflection under load or the shaft deflection under load or the shaft misaligning in mounting, and their permissible aligning angle is 1 to 2.5 degree. This type of bearings has heavy load carrying capacity and anti-impact ability, in addition to radial loads, they also can carry axial loads in two directions. In general, this type of bearings permit a low limiting speed.
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GWG make large diameter spherical roller bearings In addition to stardard bearings, GWG supply non-standard and customer bearings in shorter lead time than expected.For more information,please view our homepage www.gwgbearings.com
Series No. Bore diameter Range Cage Type
239XX 150~800mm CAM, MB, CC
230XX 150~800mm CAM, MB, CC
240XX 150~800mm CAM, MB, CC
231XX 150~800mm CAM, MB, CC
241XX 150~800mm CAM, MB, CC
222XX 150~800mm CAM, MB, CC
232XX 150~800mm CAM, MB, CC
213XX 150~800mm CAM, MB, CC
223XX 150~800mm CAM, MB, CC
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Excel-series Spherical Roller Bearings
The spherical raceway of outer rings are manufactured and assembled focusing to the center of bearings.
Barrel type rollers and cages are assembled with inner rings.
NACHI Spherical Roller Bearings are suitable for high axial , impulse and heavy load applications such as paper manufacturing, rolling and other large size machineries.
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