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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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Special cross-roller bearings
Precision reduction gears for robots
Client's objectives:
Reducing the number of items.
Tipping stiffness.
Suppressed servicing.
Rotation accuracy.
Weight savings,
Cost-efficient solution.
Suppressed play.
SNR-specific development:
Direct attachment ring.
Sealed and life lubricated.
Drive by inner ring toothing.
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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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- 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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Cylindrical roller bearings
The cylindrical roller Series includes several variants to permit accurate bearing selection and, therefore, improve machine efficiency. SNR's quality and innovation are at the heart of these bearings whose optimised contact between roller and raceway reduces internal loads.
The SNR cylindrical roller bearing range is recommended for high radial load and high rotating speed applications. However axial loads must remain low.
Technical data:
Puce fleche jaune Standard polyamide 6.6 cage with 25% glass fibre fill (operating temperature: 102°C to 150°C at peak).
Puce bleu For Series 4, standard steel sheet cage. Machined brass cage available as an option.
Puce fleche jaune Large size bearings are fitted with a machined brass cage (M suffix). For special applications preventing the use of synthetic cages, a metallic cage can be provided on request.
Puce fleche jaune Standard sealing. Special seals on request,
Puce fleche jaune Variable clearance depending on the Series (J20 to J50). Axial clearance only defined for bearings of NUP type, and limited by the 4 internal shrouds (to the order of 0.1mm).
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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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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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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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IDEAL FOR DIRECT DRIVES
UNITEC RTB AMS bearings series, with integrated angle measuring system are bidirectional axial-radial combined, designed for rotary tables and spindle heads for machine tools.
To improve performances of applications where RTB bearings series are installed, UNITEC developed new version RTB AMS, integrating AMOSIN precision inductive measuring system.
The manufacturing precision, low resistant torque, high load capacity and stiffness are positioning this bearings range at the top of the market, qualifying them as the most suitable solution for direct drive installations.
UNITEC RTB AMS BEARINGS FEATURES
- Inductive measuring system (NON MAGNETIC)
- Insensitivity to magnetic fields
- Real time output signals (IDEAL FOR DIRECT DRIVES)
- High rotation speed
- High measuring resolution and accuracy
Moreover:
- The most compact solution
- Insensitivity to external agents (IP 67 protected sensors)
- Simple installation
- Quickest setting
- Stable and reliable functioning
- No setting software needed
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UNITEC is a manufacturing company, certified according to ISO 9001 and belonging to the MONDIAL Group. In addition to the precision bearings for machine tools (crossed roller bearings, combined axial-radial bearings for ball screws and for indexing tables), UNITEC also manufactures bearings for the following applications:
SCREW EXTRUDERS:
- tandem bearings
TEXTILE INDUSTRY:
- special bearings, cam followers, track rollers
PAPER CONVERTING INDUSTRY:
- axial, radial and combined bearings, self-aligning bearings
PRINTING MACHINES
SENDZIMIR ROLLING MILLS
- Double- or 3-row roller bearings
STEEL AND METAL WORKING INDUSTRY
- multi-row roller bearings for cylinders
- chain wheels
- backup rollers for straightening machines
- combined needle roller bearings
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Spherical roller thrust bearings
To meet the most precise specifications, SNR proposes a permanently optimised spherical roller bearing range, providing even higher robustness.
Of small footprint, E Series roller thrust bearings are designed to sustain high mechanical loads. They accept very high axial loading, while featuring low susceptibility to shocks. However, radial loading must remain moderate. Admissible misalignment is to the order of 2° and rotating speed is low.
The high loads likely to be applied to these thrust bearings require oil lubrication (lubrication ports are provided). Grease lubrication can only be envisioned for low rotating speeds, under moderate loading.
Thanks to their detachable components the SNR thrust bearings are interchangeable.
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Tapered roller bearings
Tapered roller bearings are angular contact bearings comprised of separate components (cones and cups), facilitating installation. By design they are suitable for combined loading. They can sustain very high loads (axial load in one direction) and tolerate slight misalignment.
Always fitted oppositely with a bearing of the same nature, they provide high assembly stiffness, particularly when pre-loaded. Their load capacity associated with their versatility makes them the second most commonly used items, after radial-contact ball bearings.
SNR proposes tapered roller bearings in metric or inches dimensions.
Technical data:
Puce fleche jaune Stamped sheet or synthetic cages.
Puce fleche jaune Open bearings.
Puce fleche jaune Clearance determined by bearing adjustment upon fitting, (i.e. by adjusting the initial relative position of the cones versus the cups). Adjustment determines a mechanical clearance (positive clearance) or a preload (negative clearance).
Puce fleche jaune Suffix B : increased contact angle.
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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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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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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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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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Axial cylindrical roller bearings comprise axial cylindrical roller and cage assemblies and shaft and housing locating washers.
The bearings have particularly small axial section height, have high load carrying capacity and high rigidity and can support axial forces in one direction.
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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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Cylindrical roller thrust bearings are designed to operate under heavy axial loads at moderate speeds. 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 of separable design, the individual components can be mounted separately. These bearings do not permit any angular misalignment between shaft and housing nor any errors of alignment between the support surfaces in the housing and on the shaft.
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Axial cylindrical roller bearings
Axial cylindrical roller bearings comprise axial cylindrical roller and cage assemblies and shaft and housing locating washers.
The bearings have particularly small axial section height, have high load carrying capacity and high rigidity and can support axial forces in one direction.
Axial cylindrical roller and cage assemblies
Axial cylindrical roller and cage assemblies comprise axial cages with one or two rows of cylindrical rollers. The cage assemblies have particularly small axial section height, high load carrying capacity and high rigidity. They can support axial force from one direction and act as non-locating bearings in a radial direction. Axial cage assemblies are combined with housing or shaft locating washers or are integrated directly in the adjacent construction. If they are used without
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Full complement cylindrical roller bearing for cardan shafts applications.
Different sizes available for several purposes
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The backing bearings based on cylindrical roller bearings have two or three rows of rollers and are available as full complement bearings (without cage) or as caged bearings, with or without integral flanges or flange rings. The advantage of the bearings without flanges lies in their particularly simple geometrical form and their very high radial load carrying capacity.
Cylindrical roller backing bearings without flanges or flange rings cannot accommodate any axial load. It is therefore necessary to position thrust washers of bronze or plastic between the side faces of the outer ring and the support saddles.
Thrust washers are not required with backing bearings with flanges (or flange rings) as the design of these bearings enables them to accommodate simultaneously acting radial and axial forces.
On each backing shaft of a cluster mill, several bearings are installed side by side. With their outside diameter surface in direct contact with the intermediate rolls, these bearings rotate while carrying components of rolling force. Therefore, the outer rings of these bearings are required to have adequate rigidity and fatigue strength, and should be finished with high precision.
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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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Axial spherical roller bearings are single row, self-aligning roller bearings. They comprise solid shaft and housing washers and asymmetrical barrel rollers with cages. The cage holds the roller and cage assembly together with the shaft locating washer. The bearings can be dismantled. The parts of the bearings can be fitted separately.
Axial spherical roller bearings can support very high axial loads and permit relatively high speeds. Since the raceways are at an angle to the bearing axis, the bearings can also support radial loads.
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Split Roller Bearings are used where access for assembly and maintenance is difficult, but reliability is paramount. The ease and simplicity of replacing components, coupled with the capability to withstand harsh and aggressive environments, the Split Roller Bearing is your ideal choice in a range of industries, such as converters, continuous casting machines, drive shafts…
Split designs are available for cylindrical and spherical roller bearings with outer diameters up to 1750mm.
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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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