selecting performance grease ten crucial questions
Download
Skip this Video
Download Presentation
SELECTING PERFORMANCE GREASE: Ten Crucial Questions

Loading in 2 Seconds...

play fullscreen
1 / 43

SELECTING PERFORMANCE GREASE: Ten Crucial Questions - PowerPoint PPT Presentation


  • 220 Views
  • Uploaded on

SELECTING PERFORMANCE GREASE: Ten Crucial Questions. Presented 4-13-2006 By Don Oldiges. Principles of Selection. Manufacturer recommendations

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'SELECTING PERFORMANCE GREASE: Ten Crucial Questions' - elina


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
principles of selection
Principles of Selection
  • Manufacturer recommendations
    • Manufacturers usually provide a list of lubricants that meet the operating requirements for their equipment. (note that the equipment manufacturer's recommendation should not necessarily be considered the best selection.
  • Lubricant producer recommendations
    • When manufacturers recommend lubricants for their products in terms of specifications or required qualities rather than particular brand names, lubricant producers should be consulted to obtain advice on products that comply with the required specifications.
  • User selection
    • The user should follow the manufacturer's specification ensure that applicable criteria are met regardless of who makes the lubricant selection.
slide3
Challenging Environments

Environmentally Friendly

Temperature Extremes

Heavy Loads

High Speeds

Long Life

Demands on Grease Performance

performance objectives of grease
Performance Objectives of Grease
  • To remain in contact with moving surfaces and provide lubrication even under the stress of gravity, centrifugal action or pressure.
  • To retain its properties under use conditions at all levels of shear and temperature.
  • While performing the above, the grease must still be able to flow or be pumped where it is needed.
1 know when to use grease
Applications suitable for performance grease.

Machinery that is idle for long periods.

Moving parts that are “Sealed for Life”

Surfaces that are exposed to extreme conditions.

Extending the life of worn components.

Functional Properties

Sealant to minimize leakage

Sealant to minimize contamination

Rigidity holds it in place where its needed

Holds finely ground solid lubricants like moly or teflon.

1: Know When to Use Grease
2 know the types of grease
Aluminum, conventional

Aluminum, complex

Calcium, conventional

Calcium, anhydrous

Calcium, complex

Lithium, conventional

Lithium, complex

Polyurea

Organo-clay

Silicone

2: Know the Types of Grease

Grease is classified by penetration number and by type of soap or other thickener.

what is grease
Antioxidant

Antiwear

Antirust

Anticorrosion

Extreme pressure

VI Improver

Tackifier

Pour Point Depressant

Solid Boundary Lubricants

Dye

Petroleum Oils

Polyalpha Olefins (PAO)

Polybutenes

Esters

Polyglycols

Polyethers

Silicones

PFPE

Grease

Thickener

Fluid Lubricant

Additive

Seller

Seller

Buyer

What is Grease?

Soap

Lithium, Sodium, Barium, Calcium, Aluminum

Non-Soap (inorganic)

Clay, Graphite, Silica

Carbon Black

Non-Soap (organic)

Polyurea, PTFE, Wax

grease compatibility chart
Grease Compatibility Chart

All greases are not created equal, caution must be exercised when replacing or refilling a grease.

12

12

C = Usually compatible.

B = Borderline compatibility (probably incompatible).

I = Incompatible

what do most people use
Al Conventional

0%

Other Metal Soaps

1%

Al Complex 5%

Ca Complex 2%

Na Soap 2%

Ca Sulfonate 1%

Polyurea 5%

Ca Anhydrous 1%

Organo Clay 3%

Ca Hydrated 10%

All Others 2%

Li Complex

15%

Li Conventional

53%

What Do Most People Use?

2004 Global Production per NLGI Survey

3 know your classifications
3: Know your Classifications

Professional societies and organizations have established classifications for oil and grease. The most widely encountered are those of the following organizations:

  • SAE (Society of Automotive Engineers)
  • API (American Petroleum Institute)
  • AGMA (American Gear Manufacturers Association),
  • ISO (International Standards Organization)
  • NLGI (National Lubricating Grease Institute).
5 know any special requirements
EXAMPLES

MIL-G-3545High Temperature Grease

MIL-G-4343BGrease, Pneumatic System

MIL-G-7711General Purpose EP Grease

MIL-G-18458Wire Rope Grease

MIL-G-21164CGrease, Moly Disulfide

MIL-G-25760Synthetic Grease

MIL-G-46886Silicone Grease

EXAMPLES

Category - H1Lubricants - General Incidental Contact

Category - H2Lubricants - General No Contact

Category - H3

Soluble Oils

5: Know Any Special Requirements
  • Special Performance Requirements
  • Federal Specs and Standards
  • Mil Specs and Standards
  • Food Grade Specifications
  • ISO Standards
  • ASTM Specifications
6 know the grease characteristics required for the application
6: Know the Grease Characteristics Required for the Application
  • Apparent Viscosity (non-Newtonian)
  • Bleeding, Migration, Oil Separation
  • Consistency, Penetration, NLGI Numbers
  • Corrosion, Rust and Water Resistance
  • Dropping Point
  • Evaporation
  • Oxidation Stability
  • Pumpability
  • Shear Stability
  • Temperature effects
  • Pressure Effects
common test equipment
Common Test Equipment

Penetrometer

Grease Worker

what is penetration
Penetration with respect to a lubricating grease, is the depth (in tenths of a millimeter) that a standard cone penetrates a sample of the grease under prescribed conditions of weight, time, and temperature.

Penetration is a measure of consistency of a grease to determine its plasticity.

ASTM D-217

What is Penetration?
grease shear stability motor matic grease worker test
Shear or mechanical stability of a grease is its ability to withstand repeated working with minimum change in its structure or stability.

The shearing action in the test apparatus simulates the working of the grease in service.

The consistency is measured after 60 strokes and repeated after 10,000 or more strokes.

ASTM D-217-A

Grease Shear StabilityMotor-Matic Grease Worker Test
four ball ep test
The test is the determination of the load-carrying capacity of a lubricant in kilograms applied to a system of four steel balls in the form of a tetrahedron.

The results are used to evaluate the EP characteristic of the lubricant by a load scar curve and weld point.

The procedure consists of a series of 10-second runs made at pre-selected and successively higher loads until the welding of the four balls occurs.

ASTM D-2783

Four Ball EP Test
simple rotational viscometer brookfield type
This device measures fluid viscosity at fixed rotation speeds by driving a measurement tool ("spindle"), immersed in the test fluid, through a calibrated torsion spring. Viscous drag of the fluid against the spindle causes the spring to deflect, and this deflection is correlated with torque. The calculated shear rate depends on the rotation speed, the tool geometry, and the size and shape of the sample container. Conversion factors are needed to calculate viscosity from the measured torque, and are typically pre-calibrated for specific tool and container geometries. Simple Rotational Viscometer ("Brookfield type")
viscosity grade comparisons
Saybolt Viscosity

Universal Seconds @ 100°F

Kinematic Viscosity

cSt @ 40°C

2,000

10,000

1,000

5,000

500

3,000

2,000

300

200

1,000

500

100

50

300

200

30

100

20

60

10

ISO/ASTM

Viscosity

AGMA

Grades

SAE

Crank Case Oils

SAE

Gear Oil

Viscosity Grade Comparisons
7 know how the grease is applied
7: Know how the Grease is Applied
  • Automatic lubricating systems
  • Pressure Injectors
  • Metering pump
  • Hand operated grease applicator
  • Cartridge Grease Gun
  • Grease Filler Pump
  • Brush
8 know the packaging required available
8: Know the Packaging Required & Available

Cartridges

Small Containers

Aerosols

Pails

Drums or Totes

9 know the marketing supply channel
Performance Grease

SUPPLIER

9: Know the Marketing/Supply Channel

Where do I go to get “Good” grease?

CO-OP/

BUYING GROUP

PRIVATE LABELER

GREASE MAKER

DISTRIBUTOR

10 know the life cycle fate
Renewable & Safe

Distribution Warehouse

Consumer

Performance Grease

Packaged Grease

Environmentally

Responsible

Disposal

Raw Materials

10: Know the Life Cycle Fate
anhydrous calcium grease
Anhydrous Calcium Grease

Excess

Ca Hydroxide

Hydroxyl from

12-HSA

Ca Stearate

bentonite clay grease
Bentonite Clay Grease

Quaternary Amine

Hydrocarbon

SiO2

Hydrocarbon

calcium complex grease
Calcium Complex Grease

Ca Hydroxyl

Ca Carboxylate

Excess

Ca Hydroxide

Ca Acetate

lithium complex grease
Lithium Complex Grease

Ketostearate

Excess

Li Hydroxide

Hydroxyl from

12-HSA

Lithium

Doublet

Hydrocarbon

lithium 12 hydroxy grease
Lithium 12-Hydroxy Grease

Excess

Li Hydroxide

Ketostearate

Hydroxyl from

12-HSA

Lithium Doublet

Hydrocarbon

Hydrocarbon

aluminum complex grease
Aluminum Complex Grease

Aluminum

Hydroxyl

Aluminum

Triplet

Aluminum

Stearate

Hydrocarbon

silicone grease
Silicone Grease

Hydrocarbon

SiO2

polyurea grease
Polyurea Grease

Amine

Hydrocarbon

ad