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Combined needle roller bearings are units comprising radial needle roller bearings with a rolling bearing component capable of supporting axial loads.
X-life
Combined needle roller bearings are X-life bearings. In these bearings, the roughness and geometrical accuracy of the raceways have been optimised. This gives higher load carrying capacity and longer life.
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Single row cylindrical roller bearings with cage are units comprising solid inner and outer rings together with cylindrical roller and cage assemblies. The outer rings have rigid ribs on both sides or are without ribs, the inner rings have one or two rigid ribs or are designed without ribs. The cage prevents the cylindrical rollers coming into contact with each other during rolling.
The cylindrical roller bearings are very rigid, can support high radial loads and, due to the cage, are suitable for higher speeds than the full complement designs. Bearings with suffix E have a larger roller set and are thus designed for extremely high load carrying capacity.
The bearings can be taken apart and can therefore be fitted and dismantled more easily. Both bearing rings can therefore have an interference fit.
Single row cylindrical roller bearings with cage are available as non-locating, semi-locating and locating bearings.
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Brand Name:
EBI
Country of Origin:
China (mainland)
Key Specifications/Special Features:
30300 series, 32000 series, 32300 series
30200 series, 31300 series, 32200series
All inch series available
Technical capability: Accuracy: tolerance from ISO P0-P4 (US ABEC-1-ABEC-7); Low noise: z1-z3 at accelerated velocity value and zv1-zv3 at velocity value; Working life: according to ISO standard.
Primary Competitive Advantages:
Price
Quality Approvals
Customers' Drawings Accepted
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Brand Name:
EBI
Country of Origin:
China (mainland)
Key Specifications/Special Features:
The range of model number:
Inner Diameter : %u03C620mm-%u03C650mm,
Outer Diametor: %u03C640mm-%u03C6100mm
Primary Competitive Advantages:
Price
Quality Approvals
Good life performance
Main Export Markets:
Worldwide
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1.The bearing is Double-Row Angular Contact bearings,DAC type
2.The one box package include one bearing and nut/seal/snap rings/wire etc. accessories
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Model NAST
A separable type of bearing that combines a thick-wall outer ring, an inner ring and needle rollers equipped with a precision cage. Since the structure is simple, it allows high accuracy to be achieved at low cost.
Model RNAST
A bearing that combines a thick-wall outer ring, an inner ring and needle rollers equipped with a precision cage.
Model NART
This model is a non-separable type of bearing system whose inner ring is fixed to the side plates. Since the outer ring is spherically machined, it helps reduce a biased load.
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For economical designs in machines, lifting and handling
systems.
Advantage of the Combined Bearing system:
- Reduces your designing and production costs
- Can take up high radial and axial loads
- Strong profiles for high stat. and dynamic loads
- Best dispersion of forces in the profiles
- Longer lifetime for bearings and profiles
- Economical assembling by welding bolt
- Bearing components are easily exchangeable
Technical characteristics:
- Outer rings are made from case-hardened steel UNI 16 CrNi 4 hardened at 62+2HRC
- Inner rings are made from bearing steel En 31-SAE 52100 hardened at 62-2 HRC
- Cylindrical rollers have flat ground heads, made from En 31-SAE 52100 steel hardened at 59 – 64 HRC
- Welding bolts are made from C22E (Material no. 1.1151)
- Bolt tolerance –0.05 mm
- Bearings from 4.055 to 4.063 are relubricateable
- Bearings are lubricated with grease grade 3 (e.g. Shell Alvania 3, Esso Beacon 3)
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SE Series slides are designed for ultra high precision.
SF Series features end plates for positioning, making them ideal for factory automation applications.
SP Series features end plates for positioning, making them ideal for factory automation applications.
SC & SK are availalbe with a crank or knob mechanism for manual operation.
SW Series, featuring a Double "V" Raceway design, eliminates the need for a base plate and offers a very low height profile.
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- RA-C (single split type) As the outer ring is split at one point is it most -suited where rigidity and high accuracy are required of both inner and outer rings
- Ultra thin and easy to install
- High rotational accuracy
- Easy handling
- 2D & 3D CAD Drawings
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Timken® cylindrical bearings are designed to manage heavy radial loads through expertly designed critical dimensions, such as roller and raceway diameter and contact geometry. Our cylindrical bearings range from small to large bores - with up to four rows of rollers - for a wide range of industrial applications.
Design attributes:
Large bores for integration into heavy-duty industrial applications
Cylindrical rollers accommodate heavy radial loads
OD sizes 180 mm and larger
Potential applications: power generation, oilfield, mining and aggregate processing, gear drives and rolling mills.
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IMO Momentenlager, with its modern facilities, manufactures Ball and Roller Slewing Rings in diameters up to 5,200 mm. IMO Ball and Roller Slewing Rings are used for example in the following applications: construction machinery, cranes, tunnel boring machines (TBM's), medical technology, ship building, special purpose machinery, bulk and material handling.
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Needle roller and cage assemblies are single or double row units comprising cages and needle rollers.
Since their radial section is no greater than the diameter of the needle rollers, needle roller and cage assemblies allow bearing arrangements with a very small radial design envelope to be achieved. They have very high load carrying capacity, are suitable for high speeds and can be easily fitted.
If the raceways are produced to high geometrical accuracy, bearing arrangements with high runout accuracy can be achieved.
The radial internal clearance can be influenced by the needle roller sort and by the shaft and housing tolerance.
Needle roller and cage assemblies require a hardened and ground raceway on the shaft and in the housing.
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Timken produces a broad range of radial and thrust needle roller bearings and bearing assemblies. Our needle bearings and assemblies are used in a variety of markets, including consumer products, construction, agriculture, automotive and general industrial goods.
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Spherical Roller Bearings
S-2000 Unit-housed double-row S-2000 spherical roller bearings have higher ratings and long L10 life. These bearings are in cast iron housings and available in pillow block, flange, and piloted flange versions.
Unisphere II High capacity double row spherical bearing in a compact, one-piece ductile iron housing. Interchangeable with ball bearing mounting dimensions.
IMPERIAL spherical roller bearings use a patented adapter mounting system for quick installation and removal. The IMPERIAL roller bearing is available in flange, pillow block, or insert configurations, with interchangeable dimensions and superior sealing options.
Imperial HD provides the added strength of steel housings. For large bore applications (8" and above), Dodge offers the Hydraulic ISAF which incorporates hydraulic nuts and pistons to assist with installation and removal.
USAF/USDAF Split cap spherical bearing using 22200, 22300, 23000, 23100 or 23200 spherical bearing insert. Available in adapter mount/tapered bore and direct mount/straight bore in 500, 600, 200 or 300 series housings.
SNF Plus / SSN Split cap spherical bearing using 22200K bearing insert. Available in adapter mount/tapered bore in 500 series housing. SNF Plus is cast iron, SSN is available in ductile iron or steel.
HFO Two piece split plummer block housing made of cast iron has oil conveying ring lubrication. Available in direct or adapter mount with 22200 or 22300 bearings.
Duplex Bearing Housings - BLO-A and PDNF Engineered product that virtually eliminates misalignment by using two bearings in a single housing.
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Timken® spherical roller bearings feature all of the characteristics that have made Timken renowned – superior design, reliable performance and comprehensive technical support. Our spherical bearings are designed to manage high radial loads and perform consistently, even when misalignment, marginal lubrication, contamination, extreme speeds and critical application stresses are present.
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Key Specifications/Special Features:
-30300 series, 32000 series, 32300 series
-30200 series, 31300 series, 32200series
-All inch series available
-Technical capability:
Accuracy: tolerance from ISO P0-P4 (US ABEC-1---ABEC-7)
Low noise: z1--z3 at accelerated velocity value and zv1--zv3 at velocity value
Working life: according to ISO standard
Primary Competitive Advantages:
-Price
-Quality Approvals
-Customers' Drawings Accepted
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Timken offers the most extensive line of tapered roller bearings in the world. Tapered bearings are uniquely designed to manage both thrust and radial loads on rotating shafts and in housings. We manufacture nearly 26,000 bearing combinations - in single, double and four-row configurations. Sizes range from an 8mm (0.31496'') bore to a 2,222.5mm (87.5'') outside diameter. Customized geometries and engineerd surfaces can be applied to these bearings to further enhance performance in demanding applications.
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Single row tapered roller bearings
Tapered roller bearings with large contact angle
Tapered roller bearing with flanged outer rings
Double tapered roller bearings
Inch series single row tapered roller bearings
Four row tapered roller bearings (380000 type)
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ITEM
D B d
BD-17 17 10 6
BD-22 22 11 7
BD-30 30 14 0
BD-39 39 18 15
BD-40 40 18 15
BD-57 57 22 20
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Hevi-Rail® Bearing Systems are the lightweight and low-cost solution for jobs with extremely high axial and radial load requirements. This is achieved by an economical assembly and durable bearing components which are easily interchangeable.
The outer races of the HEVI-RAIL® bearings feature the high radial capacity of a heavy-duty roller bearing. Built within this outer bearing at 90 is an inner bearing that handles axial or side loads. This simple design eliminates the need for two or more cam follower type bearings mounted in opposite directions. It requires fewer components and will operate in a smaller space.
As a result, HEVI-RAIL® saves valuable floor space, time in assembly, and money. Its long life bearings and economical assemblies make it an ideal solution for custom lift units, lift trucks, and heavy load applications in the aerospace, paper, steel and coil industries. The rollers come pre-installed for easy installation. The Hevi-Rail® system includes: combined bearings, profile rails, clamp flanges, and flange plates.
• Advantages of the Combined Bearing System:
• Economical assembly
• Long life-time bearings and profile rails
• Bearings components are easily interchangeable
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SRB - Needle and roller bearings for screw drives
SRB series bearings consist of a needle roller radial bearing with solid outer ring and an extended inner ring. The side surfaces of the outer ring act as tracks for the two axial cages.The two axial cages are centered on the inner ring.
Thanks to this design it is possible to realize a precision journal, having little overall dimen sions and high stiffness.
All SRB bearing designs have been developed in order to be a radial/axial support for precision ball screws of machine tools. In order to obtain max stiffness, these bearings are preloaded by means of a locknut.
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IKO Crossed Roller Bearings are compact bearings with their rollers alternately crossed at right angles to each other between inner and outer rings. They can take loads from any directions at the same time such as radial, thrust and moment loads. The rollers make line-contact with raceway surfaces, and , therefore, elastic deformation due to bearing loads is very small. These bearings are widely used in the rotating parts of industrial robots, machine tools, medical equipment, etc., which require compactness, high rigidity and high rotational accuracy. In addition, bearings made of stainless steel or those with inner and outer rings provided with mounting holes are also available on request.
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XRB - Customized crossed roller bearings
Compact design, capacity to carry high axial loads in both directions combined with radial loads and high tilting moments.
UNITEC crossed roller bearings XRB series are the ideal solution where space is limited or lower center of gravity of the rotating masses is requested.
The main applications for UNITEC crossed roller bearings are indexing tables, rotating tables, spindles with horizontal and vertical axis and robot arms.
All UNITEC XRB cross roller bearings are designed and manufactured, only according to customer requirements.
UNITEC XRB crossed roller bearings can be provided with
- other dimensions on demand;
- precision class P0, P6, P5, P4 or according to different specifications;
- clearance or preload to be adjusted during assembly;
- pre-adjusted clearance or preload.
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planetary bearings for gearboxes
SL and RSL types, transmission bearings, hydraulic motor and pump bearing
bearings with black oxide rollers for heavy conditions
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planetary bearings for gearboxes
SL and RSL types, transmission bearings, hydraulic motor and pump bearing
bearings with black oxide rollers for heavy conditions
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Four-row cylindrical roller bearings are used almost exclusively in the metal industry(Rolling mills). Their friction is relatively low when compared with other roller bearings. As they are normally mounted with an interference fit on the roll neck, they are particularly suitable for rolling mill applications where the rolling speed is high.
Since very many rollers can be incorporated, the radial load carrying capacity is exceptionally high. Multi-row cylindrical roller bearings are unable to accommodate axial loads but they can be mounted together with deep groove or angular contact ball bearings or with tapered roller bearings to help accommodate any axial loads.
HOYI is very accomplished in making Four row cylindrical roller bearings. The dimensional accuracy is P6 and running accuracy is P5 (same with SKF accuracy) We have seen the over inflated prices and the impossibly long lead times being offered. We are offering a quality alternative, with very reasonable lead times and at a competitive price.
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NSK manufactures a complete range of cylindrical roller bearings. Both metric and inch sizes are available in bore sizes ranging from 1/2" to 1320 mm.
By virtue of the line contact between rolling elements and raceways, cylindrical roller bearings have high radial load capacity and are suited to high speed applications.
There are several designs, designated NU, NJ, NUP, N or NF for single row bearings and NNU or NN for double row types. In each case, the designation defines the bearing ring rib configuration.
For single row bearings NU and N types the inner and outer rings can move axially, in both directions, relative to one another. These are suited to use as ‘free-end’ bearings.
The other configurations are capable of sustaining axial loads. Double row bearings are used primarily in machine tool applications having high radial rigidity. Both NNU and NN configurations are ‘free-end’ types.
Pressed steel, machined brass and polyamide cages are available. Single row extra capacity designs can also be supplied.
For the steel industry NSK manufactures a range of four-row cylindrical roller bearings. These are primarily designed for use as steel mill roll-neck bearings.
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Welcome to RBC's on-line Engineering Data Guide for Spherical Plain Bearings. RBC has been a pioneer in spherical bearing technology since inventing the fractured outer race design over 40 years ago.
Since that time, RBC has continued to introduce industry leading innovations such as high misalignment, angular contact, extended inner ring, tapered bore, case carburized, and enhanced lubrication groove spherical bearing designs. These advanced products are used in pivoting, high load bearing applications where angular misalignment is required. Most typically, RBC spherical plain bearings are employed in hydraulic cylinder rod ends, vehicle steering linkage suspensions, heavy equipment articulated joints, and other severe duty uses.
To access critical dimensions and data for your design questions, use the Search By Criteria section below. If you are uncertain as to which of RBC's Spherical Plain Bearings is best suited for your design application, check with our selection guide. To view an entire product series, select a product from the table of contents.
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RTB - Combined axial-radial roller bearing for indexing tables
Axial-radial precision bearings for indexing tables.
Due to their high axial stiffness and their capacity to bear high tilting moments, UNITEC bearings RTB series are particularly recommended for rotating, positioning and indexing tables and milling heads.
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Timken® cylindrical bearings are designed to manage heavy radial loads through expertly designed critical dimensions, such as roller and raceway diameter and contact geometry. Our cylindrical bearings range from small to large bores - with up to four rows of rollers - for a wide range of industrial applications.
Design attributes:
Large bores for integration into heavy-duty industrial applications
Cylindrical rollers accommodate heavy radial loads
OD sizes 180 mm and larger
Potential applications: power generation, oilfield, mining and aggregate processing, gear drives and rolling mills.
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