NTN - Bearings for Mining Application

8/13/2019 NTN - Bearings for Mining Application

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For New Technology Network

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CAT. No. 8601 E


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NTN Mining ApplicationThere is a wide range of heavy duty machinery used in mining industries.They need high reliability for continuous operation.

NTN can support them with high quality, heavy duty rolling bearings, plainbearings, constant velocity joints and plummer blocks.Please take a look at the variety of NTN products.

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SPHERICAL ROLLER BEARINGSUA TypeSPHERICAL ROLLER BEARINGS

SEALED SPHERICAL ROLLERBEARINGS WA Type PLUMMER BLOCKS BEARINGS with SOLID GREASE

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CYLINDRICAL ROLLER BEARINGSE Type

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PRODUCTS


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SPHERICAL PLAIN BEARINGSLARGE SIZE TAPERED ROLLER BEARINGS

EA TypeLARGE SIZE DOUBLE ROW

TAPERED ROLLER BEARINGSCYLINDRICAL ROLLER BEARINGS

SL-Type

TRIPLE-SEALED BEARINGSfor BEARING UNIT

INSULATED BEARINGSMEGAOHMTM Series CONSTANT VELOCITY JOINTSNEEDLE ROLLER BEARINGS

DraglineExcavator

Ball MillPrimary Jaw CrusherCone CrusherImpact Crusher

TrucksApron FeederConveyor

Vibrating FeederVibrating Screens

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6 7 8 9

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Mining Crushing Transfer Processing

NTN Mining Application

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SPHERICAL ROLLER BEARINGS

Features

The material NTN developed for LH series spherical rollerbearings has gained considerable acceptance in the market.As a next step, NTN will launch the new series with asymmetrical roller design with LH material as a standard.For bearings with an OD over 420mm, both asymmetricaland symmetrical roller design are available.

Application Example

Bearings for swing machinery

Longer Life (Over 3.5 times)Higher Capacity (1.4 times)High Temperature (250C)

High reliability Reduced maintenanceLonger service life

Compact design Spares inventry reduction

The benefit of longer lifeThe benefit of longer life

The benefit of higher capacitySpecial heat stabilization is not neededThe benefit of higher temperaturematerial


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SPHERICAL ROLLER BEARINGS UA Type

Features

This design provides a bearing uniquely qualified for heavy, shock or vibratory type ofradial loading.

Application Example

The type UA spherical roller bearing, with high dynamic capacity, is recommended forapplications having heavy or shock type of radial loading such as vibrating screensand heavy load applications such as reduction gear units.

UA Type

Vibrating screen

CAT. NO. 3710/E


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CYLINDRICAL ROLLER BEARINGS E Type

Features

1. Longer life (1.5 times longer life than standard type)

2. Higher load rating than standard series via larger size rollers

Fig.1 Comparison of internal design

Fig.2

180mm 100mm 215mm 120mm

E type Standard type

Fig.3 Type variation

Fig.4 Cage type

NU2220EC r=335kN

E type bearing

NU320C r=299kN

Standard typebearing

NU224EC r=335kN

E type bearing

Type NU

Molded resin cage Machined brass cage

Type NJ Type NUP


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LARGE SIZE TAPERED ROLLER BEARINGS EA Type

A newly developed special heat treatment allows these bearings to ensure longer operating lifeunder severe operating conditions!!

EA bearings have a particularly strong advantage by providinglonger operating life due to their improved crack fatigue strength,wear strength and peeling resistance characteristics, especiallywhen the lubricant is contaminated, but also under clean lubricant

conditions. Accordingly, these bearings can be used in mining andore processing applications where marginal lubrication, vibrationsand impact loads often exist. The EA bearings provide advantagesdue to their compact design, longer operating life, and longerintervals between maintenance and inspections. EA materialtreatment can be offered in tapered roller, cylindrical roller andspherical roller bearings.

Compound layerof carburized andnitrided materials

Carburized layer

Core

CAT. NO. 3024/E

Features Application Example

Front wheel of dunp truck


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LARGE SIZE DOUBLE ROW TAPERED ROLLER BEARINGSCAT. NO. 2202/E

Back to back arrangement and face to face arrangement areboth available, and they have been adjusted so that eachtypes internal clearance is fixed. Pairs of duplex single rowtapered roller bearings are also manufactured. For moredetails, contact NTN Engineering.Face to face arrangement types are used for reducers andtyre rollers in vertical mills. Especially bearings for tire rollersare designed to endure heavy loads and shock loads. Pintype cages are sometimes selected for maximum capacity.For heavy load and bi-rotational applications, NTN utilizepinned cages with pin seating bush for increased cagestrength. This cage design has gained strong acceptance byequipment operators.


Face-to-face Back-to-backThe tyre roller of vertical mill


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SPHERICAL PLAIN BEARINGS

Self-Iubrication type

Lubrication type

Lubrication type thrust bushing

Self-lubricating type spherical plain bearings Lubrication type spherical plain bearingsSelf-lubricating spherical plain bearings are primarilyintended for situations where a long life, free from main-tenance and lubrication requirements, is desired. They arealso used for applications where lubrication is difficult.

Lubrication type spherical plain bearings feature slidingsurfaces where both the inner and outer rings are steel.: Fractured outer ring type and fitting groove type areavailable.

Excavator Wheel Loader (articulate type)

Features

Application Example

CAT. NO. 5301/E


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SEALED SPHERICAL ROLLER BEARINGS WA type

The high load capacity of spherical roller bearings and theireasy adaptability to a variety of applications has led toincreased use in nearly every industry. Compact sealedspherical roller bearings have been developed by NTN specifically to address the need for longer operating lifesuch as longer maintenance or relubrication.

Exellent sealing performance against dusts, and slurryCan be installed in the standard series plummer blocksRe-grease without removal of sealsUniform sealing capability under misaligned operatingconditions

Cross section of plummer block unit

Sealed spherical roller bearing

Head pulley

Tension pulleyTail pulley

(drive pulley)

Direction of movement

CAT. NO. 3702/E


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PLUMMER BLOCKS


Trunnion bearing of ball tube mill

Supporting roller of tube mill

Tightening boltThe bolt protects theplummer block againstloosening due tovibration and impact.

Oil drain plugFor draining old lubricant.

Plummer block unitDesigned for greater mechanicalstrength, and manufacturedunder strict quality control program.To suit the intended application, it canbe made of either spheroidal graphitecast iron (ductile cast iron) or cast steel.

Dowel ballThe upper and lower housingscan be assembled together athigher accuracy by ball-dowelsystem using steel ball.Also, the upper cover can beinstalled or removed easily.

Oil fill plugFor relubrication.

SealExcellent sealing performance.

Spherical rollerbearingSelf-aligning ball orspherical roller bearingis built into plummer block.

Mounting boltholesAllow easy positioningand installation.

AdapterSimplifies installationof the bearing.

CAT. NO. 2500/E


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BEARINGS with SOLID GREASE

Features

"Solid grease" is a lubricant essentially composed oflubricating grease and ultra high-molecular-weightpolyethylene. Solid grease has the same viscosity asordinary grease at normal temperature, but as aresult of a special heat treatment process, this greasesolidifies retaining a large proportion of thelubricant in it. By this solidification, the grease does noteasily leak from the bearing, evenwhen the bearing is subjected to strong vibrations or

centrifugal force.

1. Reduced lubricant leakageBecause the base oil is retained in a solid form, it is lesslikely to leak out of the bearing. During operation,temperature rise and/or centrifugal force will cause agradual release of the base oil into the rolling surfaces.Eliminating grease leakage from the bearing ensures aconsistent supply of lubricant and prevents contamination ofthe surrounding environment.

2. Superior lubricationBearings with solid grease resist grease leakage prolongingbearing life in applications where high centrifugal force orvibration are present. The solid lubricant does not emulsifywhen exposed to water also extending both grease andbearing life.

3. Sealing effectThough solid grease protects a bearing against ingress offoreign matters (water, dust, etc.), it is not an effectivesealing device. Therefore, for applications that need reliablesealing performance, we recommend the use of contact typerubber seals (deep groove ball bearings, bearing units) orother seals (other bearing types).

Solid grease bearing for swing machinery

Solid grease lubrication

CAT. NO. 3022/E


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TRIPLE LIP SEALED BEARINGS for BEARING UNIT

Features

Triple lip sealed bearing units are suitable for equipmentused in locations subjected to splashing foul water andslurry, and heavy dust contamination, including miningconveyors, mixers, pumps and samplers.

A pillow unit (right) and a square flange unit (left) are used ina conveyor unit operating in an environment with heavyairborne dust.

Application Example

Fig.1 Triple lip sealed bearing

Fig.2 Triple seal

Triple lip sealFor easy mounting of the bearingon the shaft, tightens securelyand does not loosen.

Outer ring

Innerring

Ball

Triple lip

Sealed plateGalvanized steel plate constructionensures improved corrosion resistance.Optimal design contributes to enhancedpressure resistance.

Sealing deviceThe rubber seal extends to the outercircumference the shielded plate for bettersealing performance, and prevents contaminationof the bearing by dust or foul water.

Provides excellent dustproofing and waterproofing,thus protecting against contamination by dust or foul water.

Balled setscrew

CAT. NO. 3905/E


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NEEDLE ROLLER BEARINGS

Features

PK Series needle roller and cage

assemblies are widely used inconstruction machinery, agriculturalmachinery and hydraulic equipment .Often, numerous needle roller bearingsare used in the planetary gear speed-reduction mechanism for mining andconstruction machinery.

Application Example

Features

PKJ Series needle roller and pressed

cage assemblies were developed to dealwith requirements of reduced costcoupled with high durability for toughapplications. It features an outsidediameter guided cage, with the sameplate thickness and high rigidity as PKseries.

Features

In recent years, customers have required

for bearings that have ever-increasingcapacity. In response, NTN created asuper high-capacity needle roller andpressed cage assemblies as the HWTJType. Compared to the standard design,the number of rollers is increased by 20to 30% and basic load rating by 20 to35%. This bearing series satisfies therequirements of large basic load rating,long life under severe operatingconditions and high rigidity.

Planetary speed reducerTransmission

Super high-capacity needle roller and

pressed cage assemblies

PK Series needle rollerand cage assemblies

PKJ Seriesneedle roller and

pressed cage assemblies


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INSULATED BEARINGS MEGAOHM TM Series

Features

Bearings used in electrical equipment such as DC and ACvariable speed motors, generators etc, can exhibit electricalpitting resulting from current leakage. NTN 's MEGAOHM TM Series of insulated bearings has been specifically designedto counteract electrical pitting. These bearings are availablein both ceramic and resin types suited to a variety ofapplications. The MEGAOHM TM Series of insulatedbearings offers the following unique advantages:

Application

Exhibits insulation resistance of at least 100 M at 500 VDC. Available in a wide range of variants with various insulating layer materials, high voltage resistance and shock immunity that accommodate diverse user requirements. Compatible with ISO 492, DIN 620 and JIS 1514 standards. Available in bore diameters ranging from 50 to 160 mm.

Insulated Bearings for Generator

CAT. NO. 3030/E


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The constant velocity joints are generally designed for driveaxle. Maximum allowable alignment angle is 42They have a long re-lubrication interval, high reliability forlong life, high efficiency and smooth rotation & low noise.Available part numbers are BJ125 BJ300.

Dump trucks Wheel loaders Shuttle cars All terrain trucks and cranes Vibrating screens Crushers PTO for engine -auxiliary equipment or propeller shaft


CAT. NO. 5603/E

CONSTANT VELOCITY JOINTS

Without Boot

With Boot

Drive Axile

NTN - Bearings for Mining Application

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