2 - slack - field engineering miami july 2006

2006 Exxon Mobil Corporation. All Rights Reserved.

Americas FES MeetingMiami, July 2006

ExxonMobil Grease Technology Update

D.A. SlackC.R. CoeR.A. MillerO. DuPuis


Entregar valor al cliente a través de la tecnología • Una línea de productos fácil de entender “Una Marca – Una Cualidad” para cumplir

con los requerimientos de cada aplicación – Simplificación de la línea global de grasas Mobil– Estandarización de nombres de productos mas transparente – Menor traslape de aplicaciones de productos

• Focus en la tecnología de los espesantes : lithium, lithium complex, and polyurea– Espesantes adicionales (clay, calcium sulfonate, etc.) empleados a necesidad

para cumplir con los requerimientos de algunos nichos de mercado– Aceites basicos, polímeros y aditivos completan la oferta

• Unica tecnología de fabricación XOM “Grease Pro” para producir grasas de lithium and lithium complex (ambas mineral y sintéticas) de alta consistencia, calidad y desempeño.– Procedimiento por lotes para fabricación de grasas especiales y de Poliurea


Polyurea Synthetic

ConventionalLithium

PolyureaMineral

Li ComplexMineral

Li ComplexSynthetic

Competitive

Premium

Flagship Appl SpecProducts

Appl SpecProducts

Global Grease Product Line Vision:Core Technology Focus

• Polyurea Synthetic - newest step-out performance exceeding Mobilith SHCs in targeted areas

• Lithium Complex Synthetic - Mobilith SHCs, flagship synthetic technology with improved high temperature life

• Polyurea Mineral - Polyrex EM line expanded to fill gaps and complement LiX mineral family

• Li Complex Mineral - Largest family, multipurpose, rationalized cost/performance, mostly “Grease Pro” manufacturing

• Conventional Lithium - Harmonized formulations/packages/lowest COGS & complexity/”Grease Pro “or batch manfacture

• Application Specific Products - as needed to complete offer in specialty sectors (CVJ, food grade, EAL, etc.)

Thickener, Polymer,AdditivePlatform

Moly/Other

ISO

VG

NLGI Grade

Appl SpecProducts

Core Technologies: Li, LiX, PU


ProductFamily Identifier Identifier

ProductBrand

MasterBrand

MobilMobil lith XHP MolyExtraExtra222

.... provides critical information: ISO VG = 220 & NLGI = 2

Or for semifluid grease: first 2 digits = NLGI grade 3rd digit = AGMA grade

ISO/NLGI

Arquitectura de los nombres:El uso de cinco celdas es una parte crítica de la nueva nomenclatura

.... provides information on thickener technology: lith = Lithium ComplexPolyrex = PolyureaCentaur = Calcium Sulfonatetemp = Claylux = Lithiumgrease = Niche FS & Prem

...identifies brand architecture:SHC = F.S.XHP = Prem

Note: misc competitive = Greasrex


Grease Basics

Ventajas • Permanecen adheridas, reducen pérdidas• Sellan contra contaminantes• Usadas donde la relubricación es dificilDesventajas• Compatibilidad entre grasas• Bajas propiedades de disipación de calor• Manufactura compleja

Improve Performance

Provides Structure

Provides LubricationPropósito

PhysicalChemical

Soap (e.g., lithium)

Non-Soap (e.g., polyurea, clay)

Synthetic MineralTipos

AditivosEspesanteAceite Base

Grease = Basestock + Thickener + AdditivesGrease = Basestock + Thickener + Additives


• Propiedades de desempeño afectadas por el tipo de espesante– Punto de Goteo - lithium complex, polyurea and clay tienen altos

puntos de goteo– Estabilidad de la composición - lithium complex and simple lithium

tienen excelente estabilidad mecánica– Resistencia al agua - calcium sulfonate, lithium complex, polyurea

and simple lithium todas tienen buena resistencia al agua– Bombeabilidad - lithium, lithium complex and polyurea todas

tienen buena bombeabilidad• Factores de la aplicación que afectan la elección del espesante

– Frecuencia de relubricación - polyurea excelente para llenado de por vida

– OEM requirements – Especificados por el fabricante– Compatibilidad – Debe ser evaluada caso por caso

Notar que muchas de estas propiedades también son influenciadas por los aceites base y los aditivos

Consideraciones del espesante al escoger grasa


¿Por qué actualizar a una grasa sintética?

• Las grasas sintéticas tienen grandes características para resolver problemas, aumentar la rentabilidad y el ahorro de dinero

• La grasa sintética correctamente escogida puede proveer: – Mejorar los indicadores de viscosidad y la lubricación EHL (Elasto-

hidrodinámica) así como el espesor de película.– Larga vida a altas temperaturas– Extraordinario desempeño a baja temperatura– Alto desempeño y mayor biodegradabilidad– Resduce los costos y la complejidad del mantenimiento

• Menos productos necesarios en campo• Eliminación de la rotación estacional de productos para operaciones a

la interperie.


Mineral

Synthetic

Natural

Exotic

Polyalphaolefin (PAO)EsterPolyglycolAlkylbenzenes

ParaffinicNaphthenic

Una grasa no puede ser mejor que su aceite base

Vegetable Oils

Silicones, Fluorinated Fluids

Aceites base

• Rango de viscosidad de aceites base entre 10 y 1500 cSt


Tipos de aditivos y funciones

FunctionsFunctionsPurposePurposeAdditive TypeAdditive Type

Chemical reaction with metal surface to form film with lower shear strength than the metal, thereby preventing metal to metal contact

Reduce friccion y desgastePreviene el picadoAntiwear & EP Agent

Preferential adsorption of polar constituent on metal surface to provide protective film of neutralize corrosive acids

Previene la corroción y herrumbre en las piezas en contacto con la grasa

Corrosion & Rust

Inhibitor

Oil soluble polymers increase base oil viscosityAumenta la visc. del aceiteViscosity Modifier

Decompose peroxides and terminate free radical reactions

Retarda la descomposición por oxidaciónAntioxidant

Form inactive film on metal surfaces by complexing with metallic ions

Reduce los efectos catalítico de metales en la oxidaciónMetal Deactivator

Polymers increase cohesive and adhesive properties of grease

Aumenta la adhesión y resistencia al aguaStructure Modifier


Balance of Properties

Additive Performance

ConsistencyConsistency

Extreme-PressureExtreme-PressureAnti-WearAnti-Wear

Low TemperatureLow TemperaturePumpabilityPumpability

CompatibilityCompatibility

MechanicalMechanicalStability /Stability /

Oil ReleaseOil Release

CorrosionCorrosionProtectionProtection

High TemperatureHigh Temperature

Water ResistanceWater Resistance


Métodos XOM de fabricación de grasas• Por lotes: Contactor/Kettle or Open Kettle - slow, labor intensive • Continua: Grease Pro – máxima eficiencia

• Ventajas Grease Pro• Alta calidad y desempeño de producto• Textura mas suave y apariencia mas uniforme• Mas uniformidad en la dispersión en el espesante• Mas limpia• Mayor uniformidad en el tamaño de los poros resultando en

mejor eficiencia al liberar el aceite

Lithium Grease Fibers at 35,000X

1 micronBatch Grease Pro


Grease Manufacturing Process Comparison

Grease - Pro


Mobilgrease XHP 222

Mobilith AW Series

Mobilux EP Series

Mobilith SHC

Beacon EP Series

AS-IS

TO-BEGreases – General Industrial

COMPETITIVE

PREMIUM

FLAGSHIP

Lithium Core Product Offer• Eliminate Mobilith AW and

convert to Mobilgrease XHP or Mobilux EP

• Eliminate Beacon EP – De-harmonization

Unirex EP 2 TBD

E

E

Mobilith SHC PM 220Mobilith SHC 460

Mobilith SHC 100

Mobilith SHC 221

Mobilith SHC PM 460Mobilith SHC 1500ML SHC 1000 Special

MG XHP 221

MG XHP 005MG XHP 220

MG XHP 461 / 462

MG XHP 222

MG XHP 222 Special

Mlith AW 00Mlith AW 0XHP 221XHP 222

Current Product

XHP 222 SpecialRonex ED 1 / 2

Mobilux EP 1

Mobilux EP 023

Mobilux EP 0

Mobilux EP 2

No Change

No Change

Mobilith SHC 220

Mobilux EP 3

Mobilux EP 004

Mobilux EP 2 Moly

MG = MobilgreaseML = Mobilith

MG XHP 223 XHP 223

GreaseColor


Mobilith SHC Series : Flagship Synthetic Hydrocarbon Greases

• Unique lithium complex soap is an ExxonMobil core thickener technology • Synthetic hydrocarbon base oils provide superior performance over a

wide temperature range • Range of grades and base oil viscosity to span wide spectrum of

application requirements• Recent formulation enhancements upgrade performance

– new zinc-based additive system improves water resistance and provides more effective corrosion protection

• Mobilith SHC greases are manufactured at Beaumont using “Grease Pro” technology for consistent quality and performance


Water Washout Performance of New Mobilith SHC

Mobilith SHC PM (dyed red)

Mobilith SHC PM 460


(Performance of Mobilith SHC PM 460vs. Current Mobilith SHC PM)

0123456789

10Wet Churn Temperature

Wet Churn Penetration Change

Water Wash Out

Roll Stability

Water Resistance

EMCOR

Alkali EMCOR

Condition of Grease in Pillow Block after AlkaliEMCOR

Mobilith SHC PM 460 Current SHC PM


(Mobilith SHC PM Series)New Mobilith SHC PM

seriesCurrent Mobilith SHC

PM

Performance of New Version vs. Current Mobilith SHC PM

FormulationBase Oil Type Synthetic SyntheticFormulation Description Zinc-Based Zinc FreeThickener Lithium Complex Lithium Complex

InspectionColor Light Tan Light TanMOV at 40°C AM-S 1697 220 or 460 cSt 460 cSt60X Penetration D217 311 290 - 320Dropping Point D2265 275 246

Mechanical / Structural =100KX Penetration D217 344 334 =CGOR wt% Bleed AM-S 1066 3.5 4.5 =CGOR 1/2 Scale Pen AM-S 1066 -7 +15 =Roll Stability D1831 +6 +13 +Oil Bleed D1742 2.6 2.19 =

Water Resistance ++Water Washout @ 79°C D1264 1.0% 10.0% ++Water Resistance DIN 51807 0 >2 ++

Rust/Corrosion +EMCOR DI Water D6138 0-0 0-0 =EMCOR Acid Water pH 4.5 D6138 0-0 1-2 +EMCOR Alkaline Water pH 12.0 D6138 0-0 0-0 =Grease Appearance after Test visual OK emulsified +Cu Corrosion D4048 1A 1B +

EP/AW +Timken D2509 65# pass 45# pass ++4 ball EP Weld Load D2596 250 250 =4 ball EP LWI D2596 53.1 55 =4 ball wear D2266 0.48 0.5 =


Mobilgrease XHP Series : Premium Greases for Industrial / Automotive

• Lithium-complex thickener for an extended operating temperature range

• Formulated with high-quality mineral base stock• Special selected polymer chemistry enhances adhesion, water

resistance, and stability– functional polymer has synergistic interaction with proprietary

lithium complex thickener • Recent additive chemistry upgrades further enhance corrosion

protection • Manufactured worldwide to global standard using “Grease Pro”

technology– wide availability and consistent quality

• Will eventually become “Mobilith XHP” in keeping with naming conventions


Roll Stability (ASTM D1831)C

ambi

o en

la p

enet

raci

ónC

ambi

o en

la p

enet

raci

ón

Mobilgrease XHP 222 Comp 1 Comp 2 Comp 3 Comp 4 Comp 5Comp 1 Comp 2 Comp 3 Comp 4 Comp 5

28

20

1618

12

2

0

5

10

15

20

25

30

Note: all are NLGI 2, base oil viscosity 180 to 220 cSt @ 40°C

Mobilgrease XHP 222 Competitive Comparisons

Mej

or


Comp 1 Comp 2 Comp 3 Comp 4 Comp Comp 1 Comp 2 Comp 3 Comp 4 Comp

55

Mobilgrease XHP 222

% e

n pe

so d

e pé

rdid

a de

gra

sa%

en

peso

de

pérd

ida

de g

rasa

3.634.00 4.23

8.318.00 7.00

3.10

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

9.00

Mobilith AW 2

Mej

or


Lavado por agua (ASTM D 1264) – Indicador de la resistencia al agua

All are NLGI #2, Base Oil Vis 180 to 220 cSt @ 40°C



30.5%30.5% 44.4%44.4% 45.3%45.3% 18.8%18.8% 47.4%47.4% 12.1% 12.1%

Comp 1 Comp 2 Comp 3 Comp 4 Comp 5Comp 1 Comp 2 Comp 3 Comp 4 Comp 5Mobilgrease XHP 222

El menor, el mejor!

50.0%50.0%Mobilith AW

2

Water Spray-off (ASTM D 4049) – Indicador de resistencia al agua

All are NLGI #2, Base Oil Vis 180 to 220 cSt @ 40°C



Cono de goteo (ASTM D 6184)

% e

n pe

so d

e go

teo

de a

ceite

% e

n pe

so d

e go

teo

de a

ceite

Comp 1 Comp 2 Comp 3 Comp 4 Comp 5Comp 1 Comp 2 Comp 3 Comp 4 Comp 5Mobilgrease XHP 222

4.43

1.861.54

1.97

4.35

2.78

1.56

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

Mej

or

Mobilith AW 2


Mobilux EP Series :Competitive Lithium Greases for Industrial and Automotive Use

• Espesante simple de hidroesterato de litio es nuestro espesante para las grasas competitivas

• Mobilux EP es formulada con aceites base minerales• El paquete global de aditivos provee a la Mobilux EP aditivos

antidesgaste, anti errumbre, anticorroción y antioxidantes– Desaparecerá la grasa Esso Beacon EP

• Para aplicaciones de baja severidad• Fabricada a nivel mundial por lotes o por el sistema “Grease

Pro”


• Pobre estabilidad mecánica

• Incompatibilidad con otras grasas

• Pobre estabilidad en el almacenamiento (separación de aceite)

• Poca protección antiherrumbre

• Alto costo

• Dificultad en su fabricación

• Poca bombeabilidad en sistemas centralizados

Tambien viene… Polyurea Greases


Polyrex EM Series :Premium Greases for Electric Motor Applications • Proprietary ExxonMobil diurea thickener is a core EMC thickener technology

providing outstanding high temperature performance– EMC thickener is inherently oxidatively stable, is an efficient thickener,

and exhibits excellent shear stability • Formulated with premium quality paraffinic base stock • Exclusively manufactured at Olathe using EMC-patented process

– special manufacturing method developed to produce a low-noise grease performance

• Polyrex EM 103 for higher speed / vertically mounted applications recently developed in response to OEM interest

• Bearing grease of choice for electric motor OEMs specifying polyurea bearing grease– Unirex N remains available for use where lithium electric motor greases

still specified by some OEMs


ASTM D3336 Grease Life at 177 °C (350 °F)

Mobil Polyrex EM

Competitor CConventional

Polyurea

ConventionalLi-Complex

0

100

200

300

400

500

600

700

800

900

Life

(L50

in h

ours

)

1 2 3


FAG FE9 Grease Life (Variation A)

Mobil Polyrex EM

Competitor CConventional

Polyurea


100

110

120

130

140

150

160

Tem

pera

ture

(°C

) to

obt

ain

10

0 hr

min

imum

Life

(L50

)

1 2 3


0

10

20

30

40

50

60

70

80

90

100

100K

X - 6

0X

Pene

trat

ion,

mm

/10

1 2 3

Shear Stability Based on 100K Penetration

Polyrex EM Competitor CConventional

Polyurea



Oil Separation Performance

0

5

10

15

20

25

30

35

0 20 40 60 80 100 120 140 160 180

Time (hours)

Oil

Sepa

ratio

n (%

)

Polyrex EM @ 120°CCompetitor C @ 120°CPolyrex EM @ 150°CCompetitor C @ 150°CPolyrex EM @ 70°CCompetitor C @ 70°C

120°C

120°C

150°C

150°C

IP 121 OIL SEPARATION @ 70°C, 120°C and 150°C

70°C70°C


Compatibilidad de Grasas Concepto General

• Dos grasas son compatibles si estas se pueden mezclar (como en la aplicación) y su consistencia está dentro del grado NLGI (30-45 mm/10) or menos de la grasa inicial

Cuidado!

• Cuando no exista compatibilidad de grasas, la grasa original debe ser completamente removida del equipo


Method

• The two fresh products are mixed at designated ratios (Wt.%)• Penetrations are performed on all mixtures before and after two hours of roll shearing (ASTM D 1831) at ambient temperature (20-35°C).• Penetrations are compared graphically

Compatibilidad de Grasas Cont.

Roll Shearing• 5Kg rollers


Example of two incompatible greases

Compatibilidad de Grasas Cont.

200

250

300

350

400

450

NLGI 2

NLGI 1

NLGI 0

NLGI 00

h

100%/0% 75%/25% 50%/50% 25%/75% 0%/100%

Muestra X/Y

Pene

trac

ión

trab

ajad

a, m

m/1

0

2hr Roll


Mobil Polyrex EM Compatibility with Unirex N2

200

220

240

260

280

300

320

340

100/0 50/50 0/100

1/2

SCAL

E W

ORK

ED P

ENET

RATI

ON,

mm

/10

2 Hour Roll60X

Polyrex EM / Unirex N2

= 35


Compatibility of Competitor C with Unirex N2

200

250

300

350

400

450

100/0 50/50 0/100

1/2

SCA

LE W

OR

KED

PEN

ETR

ATI

ON

, mm

/10

2 Hour Roll60X

Competitor C Polyurea / Unirex N2

429

= 84


Mobil Polyrex EM Compatibility with Competitor C

200

250

300

350

400

450

100/0 50/50 0/100

1/2

SCA

LE W

OR

KED

PEN

ETR

ATI

ON

, mm

/10

2 Hour Roll60X

Polyrex EM / Competitor C Polyurea

= 13


Mobil Polyrex EM Compatibility*

Product

Oil Type

Thickener

Type Exxon Unirex N Mineral Li- Complex

Mobilgrease XHP Mineral Li-Complex

Mobilith SHC 100 PAO Li-Complex

Mobilith SHC PM PAO Li-Complex

* Based on Roll Stability Testing


(Specialty Synthetic Industrial Greases for Temperature Extremes)

• Beacon 325 (Mobil brand name TBD) – simple lithium 13 cSt diester grease for low temperature applications

down to -54°C• Mobiltemp SHC 32

– clay-thickened grease with synthetic hydrocarbon base stock – excellent low temperature grease (-54°C lower operating temperature)

• Unirex S2 (to be Mobilgrease SHC 170)– lithium complex grease with 170 cSt polyol ester base stock – proprietary additive system for this ester– high temperature grease to 160°C +

• Unirex PF 500 (to be Mobilgrease SHC 500 PF)– PTFE thickened PFPE for high temperature bearing applications at

200°C+


Food Grade and EAL Specialty Greases

• Mobilgrease FM 221 and 222 food grade greases are USDA H1, Kosher, and Pareve certified – aluminum complex thickener and white oil – batch manufactured in a dedicated food-grade assets to

ensure maintenance of all certifications• Mobilgrease EAL 101 and 102 are lithium greases based on

synthetic ester technology– products are biodegradable with low ecotoxicity– will be updated in late 2006 to a lithium complex thickener

formulation with enhanced water resistance– new names will be Mobilgrease SHC 101 / 102 EAL


Mobilgrease CM Series

Delvac Xtreme Service Grease

AS-IS TO-BE

Greases – General CVL

COMPETITIVE

PREMIUM

FLAGSHIP

• Rename Moly 50 greases to Mobilgrease XHP convention

• Convert Ronex ED to XHP platform or Ronex AW

Mobilgrease Moly 50 Series

Ronex ED Series

E

E

E

Xtreme Grs / CM-SCM-PCM-WCM-LMD Xtreme GR LT Moly

MD Xtreme GR LT

MD Xtreme GRMD Xtreme GR Moly

Current ProductSpecial = 0.75% Moly

Moly = 3% MolyMine = 5% Moly

Ronex ED 1 & 2Ronex ED 2 Moly

MG XHP 461 / 462MG XHP 462 Moly

Moly 52Moly 51Moly 50

Moly 50 ArcticMG XHP 100 MineMG XHP 320 Mine

MG XHP 322 MineMG XHP 321 Mine

Ronex AW 221Ronex AW 222

Ronex AW 222 Moly

MG = MobilgreaseMD = Mobil DelvacGR = Grease

MG XHP 681 Mine Mine Grease 681

Mobilgrease Special Mobilgrease Special No Change

Lithium Core Product Offer

Grease Color


Serie Delvac Xtreme Grease: Premium Greases para aplicaciones en carretera

• Lithium-complex premium XOM core thickener technology– Grasas grado-moly tendrán pigmento rojo– Grasas grado-moly tendrán 3% molybdenum disulfide– Rango de productos para satisfacer la demanda del segmento transporte

en carretera y construcción • Formulated with high quality mineral base stocks• Special selected polymer chemistry enhances adhesion and water resistance

– functional polymer has synergistic interaction with proprietary lithium complex thickener

• Enhanced corrosion additive system • Manufactured using “Grease Pro” production process


0

1

2

3

4

5

6

7

8

9

10

Structural Stability Corrosion Resistance Low Temperature

Castrol Pyroplex Blue

Chevron Delo EP 2

Mobil Delvac Xtreme GreaseCastrol PyroplexProtection ESShell Retinax LC 2

Balanced Performance

Mobil Delvac Xtreme Grease

Mob

il D

elva

c X

trem

e G

reas

e

Mob

il D

elva

c X

trem

e G

reas

e

Mob

il D

elva

c X

trem

e G

reas

e

600 cSt base oil

189 cSt

320 cSt

220 cSt

320 cSt

Note: all are NLGI 2 Lithium Complex

Relative Performance(Higher is Better)


Mobilgrease XHP Mine Series : Premium Greases for Off-Road and Mining Applications

• Mobilgrease XHP Mine greases están construidas sobre la misma plataforma tecnológica de alto desempeño de las grasas MG XHP and Delvac Xtreme– advanced lithium complex thickener– high quality mineral base stocks– functional polymer has synergistic interaction with

proprietary lithium complex thickener to enhance adhesion and water resistance

– enhanced corrosion protection • The Mobilgrease XHP Mine series greases all contain 5% moly

– meets Caterpillar off-road requirements


Balanced Performance Upgraded Mobilgrease Moly 52 Vs Current

Mobilgrease Moly 52

010203040506070

Current Mobilgrease Moly 52 Upgraded Mobilgrease Moly 52

ImprovedImprovedMejorado Slightly poorer

Un poco menor

Wet

100

KX

Pen

Del

ta, m

m/1

0

Wat

er S

pray

-off,

wt%

Flin

g-of

f, w

t%

Mob

ility

@ -1

0C,

gram

s/m

in

Mob

ility

@ -2

0C,

gram

s/m

in


(Ronex AW 220 Series)

• Competitive lithium complex formulation intended for less severe applications – formulation does not offer the superior adhesion and water

resistance of the polymer-enhance XHP Series • Formulation features do include

– high quality mineral base stock – EP / AW protection– corrosion inhibitors

• Will be available in NLGI #1, NLGI #2, and NLGI #2 Moly grades


(Centaur Moly : Calcium Sulfonate Greases for On-Road)

• Calcium sulfonate thickener provides high temperature capability and inherent extreme pressure performance

• Sulfonate chemistry also provides excellent anti-corrosion performance in difficult applications

• Centaur greases are mineral oil base formulations • Tackiness and water resistance are enhanced by application of selected

polymers • Available in NLGI #1 and #2 grades containing 3.0% moly• Centaur Moly greases are manufactured in Olathe using batch processing

methods


(Calcium Sulfonate vs Lithium Complex Grease Comparison)

0

1

2

3

4

5

6

7

8

9

10Structural Stability

Wet Structural Stability

Low Temperature

Wear Protection

Extreme Pressure

Corrosion Resistance

Mobil Centaur Moly 2

Mobil Delvac Xtreme Service Grease


¿Como determinar los límites de alta temperatura?• La industria ha usado un rango de criterios para determinar los límites

de alta temperatura:– Recomendaciones basadas en los niveles del punto de goteo– Estándares de los fabricantes de equipos obtenidos de pruebas

• ExxonMobil ha optado por basar sus recomendaciones en el test de rodamientos FE9 usadas en la clasificación de desempeño para grasas Europea DIN / ISO– Pope and R0F data puede ser usada para desarrollar

recomendaciones en aplicaciones específicas • More conservative temperature guidance does not reflect a change in

product performance • Recomendaciones deben ser probadas contra el régimen de

lubricación EHL


(FAG FE 9 – High Speed Angular Contact Ball Bearing (DIN 51821))

Purpose• Measure the friction properties of grease.Description• 5 ball bearings are packed with 2 cc of grease• Ball bearings are placed in angular contact at

high temperature (120- 200°C), speed (3000 or 6000 rpm), and load (1500, 3000, or 4500 N axial)

• Test is ended when the drive power required to turn the bearing increases to twice its original value because of starved lubrication

• Then possible to determine the frictional moment of the test bearing from the increase in motor output

Results• The time at which the bearings have a failure

probability of 10% and 50% (denoted L10 and L50) are calculated from the data


204 K Ball Bearing

(POPE Test (ASTM D 3336))Purpose• Evaluate grease evaporation and oxidation

resistance in a lightly loaded, high speed, heated ball bearing. Test is named for the builder of the high speed spindle, Pope Spindle Co.

Description• 204 K ball bearing is packed with 3.2 cc of

grease• Rotated at 10,000 rpm under light load while

heated to 150°C, 177°C, or other test temperature

• Test cycle is twenty hours of running and four hours at rest

• When electrical current to operate the spindle motor increases by 300% of the value of the newly packed bearing, testing is stopped

Results• The number of running hours is the test result


Influencias del criterio de selección en el desempeño a altas temperaturas

• Historicamente el desempeño a altas temperaturas estaba basado en el punto de goteo – Regla práctica: Fijar la máxima temperatura de trabajo a

100°F (55°C) menos que el punto de goteo • Los ensayos en rodamiento están diseñados para exigir a la

grasa en condiciones mas reales para emular mejor los modos reales de falla : – Degradación mecánica u oxidación del espesante– Evaporación del aceite base y oxidación – Secado de la grasa por separación de aceite

• Los rangos de temperatura fijados con ensayos en rodamientos, no son tan amplios como los obtenidos en función al punto de goteo


Typical Maximum Operating Temperatures for Core ExxonMobil Greases

Product Old Max Operating

Temp (1)

Current Max

Operating Temp (2)

Current Critical Temp

Limit (3)

MG XHP Family 177°C (350°F) 140°C (285°F) 160°C (320°F)

Mobilith SHC Series 190°C (375°F) 150°C (300°F) 170°C (340°F)

Polyrex EM Series ‘- 170°C (355°F) 190°C (375°F)

(1) Estimated from dropping point “rule of thumb”

(2) Based on L50 bearing life of 100 hours in FE9 bearing test

(3) Estimated maximum short-term temperature excursion limit


Basis for Competitor High Temperature Usage Guidance is Variable

Supplier Brand Max Temp Basis for Guidance

Total Altvis MV2 160°C DIN Class’n (FE9 >100h @

160°C)

Conoco Polytac EP2 204°C Dropping Point minus 55°C

Texaco Polystar RB and

RB Synthetic

204°C Dropping Point minus 55°C

Chevron SRI 177°C D3336 Life of 600 hrs @ 177°C

Shell Stamina RLS 177°C Continuous

204°C Short Term

D3336 of 435 hrs at 177°C

FE9 of 191 hrs @ 150°C

Example : Competitive Polyurea Greases


(¿Como se determina el desempeño a bajas temperaturas?)

• There are a number of aspects of low temperature performance that may be considered in determination of low temperature limits for a given application

• Low temperature bearing torque – industrial ball bearing criteria generally based on ASTM D1478

(or similar) tests – industry automotive roller bearing by ASTM D 4693

• Dispensing equipment limitations related to slumping behavior, pressure drop in delivery lines, or metering device considerations– ASTM D 1092 / USS Mobility and Lincoln Ventmeter tests

commonly used to develop system-specific guidance • OEM guidelines for larger bearings based on EHL / lubricity may

be even more conservative (based on bearing wear tests)


Photos depict test ball bearing and test rig.

(Low Temperature Torque of Ball Bearings (ASTM D 1478))

Purpose• Evaluate the extent to which a grease retards

rotation of a slow speed ball bearing at low temperatures

Description• Single No. 6204 open ball bearing is packed

with grease and cooled to test temperature

• Bearing is rotated at 1 rpm to measure the starting and running torque, indications of grease’s consistency at test temperature

• Helpful in selection of greases for low powered mechanisms such as instrument bearings

Results• Report starting and running torques in

g • cm


Minimum Operating Temperatures for Selected ExxonMobil Greases

• Guidelines based on Low Temperature Torque (ASTM D1478)

– max 10000 gcm Start / 1000 gcm Run standard is consistent with DIN (Deutsch Institut für Normung) classification and available OEM guidance

Product Minimum Operating Temperature (1)

Polyrex EM -30°C

Mobilith SHC 220

-40°C

Mobilith SHC 100

-50°C

Mobiltemp SHC 32

-54°C

Beacon 325 -54°C


US Steel Mobility (USS Method)

Purpose

• Determine grease flow properties at -18°C

Description

• Flow rate in grams per minute is determined

• Lubricating grease cooled to -18°C is forced through largest capillary used in ASTM D1092 Apparent Viscosity Test - ASTM D1092 grease cylinder and piston are used

• Grease flow can also be determined at other temperatures

• Base oil viscosity has a large effect on grease flow

Results

• Results are reported in grams/minute


Mobilgrease XHP 222 Competitive ComparisonsUS Steel Mobility (USS Method)

Flow

Rat

e, g

ram

s / m

inut

eFl

ow R

ate,

gra

ms

/ min

ute

Comp 1 Comp 2 Comp 3 Comp 4 Comp 5Comp 1 Comp 2 Comp 3 Comp 4 Comp 5 Mobilgrease XHP 222

53.0

83.5

43.4

27.831.8

55.147.3

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

Bet

ter

Mobilith AW 2


Piston

Hydraulic pressure

Apparent Viscosity (ASTM D 1092)Purpose• Determine the apparent viscosity of a grease. Apparent

viscosity versus shear rate information can be useful in predicting pressure drops in grease distribution systems

Description• Sample of grease is forced through a series of 8 capillary

tubes by a floating piston actuated by the hydraulic system

• Pressure in the hydraulic system is measured• Equipment designed so determinations can be made at

any temperature between -54°C and 28°CResultsResults (in Poises) are shown graphically• Apparent viscosity vs. shear rate at a constant

temperature• Apparent viscosity vs. temperature at a constant shear

rate


• The pressure data is plotted to show the apparent viscosity as Poise vs shear rate

• The shear rate is the force delivered by the combination of piston speeds and capillaries which are sixteen different shear rates.

• This data can also be plotted to give pressure drop, pump size and other grease handling details when the NLGI Steady Flow Charts are used

Low Temperature Flow


Nomograph Developed from Apparent Viscosity Data

PUMPABILITY OF MOBILGREASE XHP 222

0.1

1

10

100

1000

0.01 0.1 1 10DELIVERY RATE, lb/min

DELTA P,psi/ft

0C+10C+24 C

PIPE ID, INCHES = 0.5


QUESTIONS ??


Back-Up Slides


Greases for High Temperature Applications• Mobiltemp - Specialty Grease Technology

– organo-clay based thickener provides high temperature performance

– high-viscosity mineral base stocks to meet EHL requirements in heavily loaded applications

– manufactured by batch process in several locations world wide• Polyrex EP – Core Grease Technology

– diurea thickener system used in Polyrex EM greases– passive extreme pressure additive chemistry– base oil properties are enhanced with soluble polymer to

provide tackiness and water resistance• Mobilgrease HT Series – Core Grease Technology for steel mill

applications


AS-IS TO-BE

Greases – General PVL

COMPETITIVE

PREMIUM

FLAGSHIP

Ronex MP Ronex MP

Mobil 1 Synthetic Grease No ChangeMobil 1 Synthetic

Grease

No Change

Infinitec 152 No ChangeInfinitec 152

Esso MP

Mobilgrease MP

No ChangeEsso MP

Mobilgrease MP No Changeor

Grease Core Product Offer

Vs Current Product

GreaseColor


PVL Greases• Mobil 1 Synthetic Grease

– the automotive grease member of the flagship Mobilith SHC technology family • Mobil Infinitec 152

– patented lithium complex chemistry developed to meet the requirements of automotive hub units and wheel bearings

• Ronex MP– premium lithium complex grease with mineral oil base stock– OEM and aftermarket automotive applications

• Esso MP and Mobilgrease MP offer competitive simple lithium grease for less severe applications

• Exxon CVJ Grease is specifically designed for constant velocity joint applications– rheological properties of the polyurea thickener are tuned to suit the application


Coupling Greases

• Mobilgrease XTC satisfies AGMA CG-1 and CG-2 requirements– lithium soap grease thickener with high-quality paraffinic

mineral oil base stock– formulation employs specially selected blend of polymers to

adjust base stock viscometrics and density in order to achieve the desired centrifugal separation characteristics

• Mobilux EP 111– lithium soap grease for use in lower speed applications– meets AGMA CG-1 and CG-3 requirements


In the test apparatus photo, the lever arm is connected to the bearing hub and depresses the load measuring device located below the floor of the tester.

Low Temperature Torque of Wheel Bearings (ASTM D 4693)

Purpose• Measure a lubricating grease’s effect on

tapered roller bearing rotation resistance when subjected to low temperatures

Description• Two tapered roller bearings are packed

with grease and then cooled to the test temperature

• Bearings are rotated at 1 rpm to measure the starting and running torque

• Starting and running torques are indications of the grease’s consistency at test temperature

• Test correlates with the performance of greases in automotive wheel bearings in low temperature service

Results• Report starting and running torques in N

• m


Lincoln Ventmeter (Lincoln Method)Purpose• Evaluate the performance of lubricating

greases in a centralized lubrication systemDescription• Measures the degree to which grease will flow

due to residual pressure and temperature• Apparatus charged with test grease by way of

a hydraulic grease fitting• All air is expelled in the charging process and

additional lubricant is pumped in to develop a pressure of 1800 psi

• The test is typically conducted at 25°C (77°F), 0°C (32°F) and -18°C (0°F)

Results• Vent pressure is recorded when Valve 1 is

opened for 30 seconds


Future Research Plans (Not for External Release)


2006+ Grease TIP Projects

• Next generation, synthetic polyurea greases with improved high temperature life for both industrial and automotive applications

• Novel approaches to manufacture of polyurea greases • Beginning work toward next generation Mobilith SHC’s and

Mobilgrease XHP’s improved life and high temperature performance– focus on both thickener and basestock related

improvements in cost and performance• Developing test rig and methodology to evaluate grease

performance in high DmN applications• Support for “debunking” of competitive claims in key market

segments

ExxonMobil Use Only


CVL Competitive Survey – Castrol Pyroplex Protection ES

• “Castrol Pyroplex Protection ES is a synthetic, lithium complex grease”• ExxonMobil lab testing shows GRP II base oil and 80% calcium thickener• Castrol PDS lists ISO 320 extracted base oil viscosity at 40C. Our lab extraction finds

135cSt base oil. (Castrol may be including polymer contribution?)• “The grease prevented bearing corrosion…in a concentrated sodium chloride

solution non-standard increased severity Emcor Test”• ExxonMobil testing using standard D6138 method with 3% NaCl yielded 3,2 results• “The “stay-in-place” ability combined with mobility and high-pressure performance”• Castrol PDS claims 12 g/min USS Mobility. Our laboratory data shows .98g/min, which is

expected for a grease having 28% thickener.

05-48774 – Castrol Pyroplex Protection ESBearing Rating 3 – 3% NaCl Emcor

ExxonMobil Use Only

2 - slack - field engineering miami july 2006

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