How to Choose the Right Industrial Lubricant

How to Choose the Right Industrial Lubricant

Choosing the right industrial lubricant is not simply a matter of selecting a grease or oil with a suitable price, brand, or viscosity.

The correct lubricant must match the machine, component, operating temperature, speed, load, environment, contamination level, lubrication method, materials, and maintenance requirements.

A lubricant that performs well in one application may be completely unsuitable for another.

For example, a high-speed electric motor bearing, a heavily loaded gearbox, a mining conveyor bearing, a hydraulic system, and a low-speed industrial chain can all require very different lubrication strategies.

Selecting the wrong lubricant can result in:

• Excessive friction
• Increased operating temperature
• Premature component wear
• Bearing damage
• Gear damage
• Corrosion
• Seal deterioration
• Excessive energy consumption
• Lubricant leakage
• Increased maintenance
• Unplanned downtime
• Shortened equipment life

SKF identifies lubricant selection as an application-specific engineering decision involving factors such as temperature, humidity, contamination, component geometry, speed and load. For oils, viscosity, viscosity index, temperature stability and additive selection are particularly important. SKF Media Hub

This guide explains how maintenance teams, engineers, plant managers and industrial buyers can systematically choose the right lubricant for industrial equipment.

1. What Is an Industrial Lubricant?

An industrial lubricant is a substance designed to reduce friction and wear between moving surfaces while helping equipment operate reliably under specific operating conditions.

Depending on the application, industrial lubricants can also provide:

• Cooling
• Corrosion protection
• Sealing
• Contamination removal
• Noise reduction
• Load-carrying capability
• Heat transfer
• Protection against oxidation
• Protection against extreme pressure
• Improved component life

The two major lubricant categories used across industrial equipment are:

Industrial oils

Industrial oils are commonly used where continuous lubrication, cooling, circulation or heat removal is important.

Applications include:

• Gearboxes
• Hydraulic systems
• Compressors
• Turbines
• Pumps
• Circulating systems
• Machine tools
• Bearings
• Chains

Industrial greases

Grease is commonly used where the lubricant needs to remain in place rather than continuously circulate.

Applications include:

• Bearings
• Bushings
• Pins
• Joints
• Conveyor components
• Electric motors
• Mining equipment
• Wheel bearings
• Slow-moving mechanisms

Grease is generally composed of a base oil, thickener and additives. The base oil performs much of the lubrication, while the thickener helps give grease its semi-solid structure and influences how it behaves in the application. lubrication.promo.skf.com

2. Why Choosing the Right Lubricant Matters

Lubrication is one of the most important elements of industrial maintenance.

When two surfaces move against each other, friction can generate heat and contribute to wear.

A properly selected lubricant creates an appropriate lubricating film between surfaces, helping reduce direct metal-to-metal contact.

But lubricant selection is a balancing exercise.

Too little lubrication can cause:

• Increased friction
• Excessive wear
• Heat generation
• Surface damage
• Noise
• Premature component failure

Too much lubrication can also cause problems.

For example, excessive grease in a bearing can increase friction and temperature and may contribute to premature failure. SKF specifically emphasizes that the amount of grease is critical and that bearings should not simply be overfilled. lubrication.promo.skf.com

Therefore:

Good lubrication is not about using more lubricant. It is about using the right lubricant, in the right quantity, at the right time and in the right way.

3. The First Question: What Component Are You Lubricating?

Before choosing a lubricant, identify the component.

The lubricant required for a bearing may be very different from the lubricant required for a gearbox.

Start by identifying whether you are lubricating:

The component type should always be the starting point.

4. Understand the Operating Conditions

Once the component is identified, understand how it operates.

A useful lubricant-selection checklist begins with:

1. Operating temperature
2. Ambient temperature
3. Speed
4. Load
5. Shock/vibration
6. Environment
7. Contamination
8. Moisture
9. Lubrication method
10. Relubrication interval
11. Component materials
12. Seal compatibility
13. Required standards or certifications

SKF's lubricant-selection guidance similarly emphasizes operating conditions such as temperature, humidity and contamination, along with component geometry, speed and load. SKF Media Hub

5. Temperature: One of the Most Important Factors

Temperature can dramatically influence lubricant performance.

Before selecting a lubricant, determine:

Minimum operating temperature

Consider:

• Winter conditions
• Outdoor equipment
• Cold starts
• Refrigeration environments
• Cold storage
• High-altitude applications

Normal operating temperature

This is the temperature at which the equipment operates during normal production.

Maximum operating temperature

Consider:

• Continuous operating temperature
• Short-term temperature spikes
• Heat generated by the machine
• Nearby heat sources
• Hot processing environments

The lubricant must remain suitable throughout the expected operating range.

SKF notes that lubricant consistency or viscosity must remain appropriate for the actual temperature conditions of the application. SKF Media Hub

6. Why Temperature Changes Lubricant Behaviour

Oil viscosity changes with temperature.

As temperature increases, oil generally becomes less viscous.

That means an oil that appears suitable at room temperature may become too thin when the machine reaches its normal operating temperature.

Conversely, an oil that is excessively viscous at low temperature may create high resistance during startup.

SKF explains that the most important lubricant parameter for many bearing applications is the viscosity at the actual operating temperature because the lubricant film depends heavily on it. Evolution

Therefore, do not select oil based only on its viscosity at ambient temperature.

Ask:

What viscosity will this lubricant have at the actual operating temperature?

7. Viscosity: What Does It Mean?

Viscosity describes a lubricant's resistance to flow.

In simple terms:

Low viscosity

The oil flows more easily.

It may be suitable for applications requiring:

• High speed
• Lower resistance
• Lower-temperature operation
• Fast circulation

High viscosity

The oil flows more slowly and provides a thicker film under appropriate conditions.

It may be useful for:

• Heavy loads
• Lower speeds
• Certain high-temperature applications
• Applications requiring greater film thickness

However, higher viscosity is not automatically better.

Excessively high viscosity can increase friction, heat generation and energy losses.

SKF research illustrates that both excessively low and excessively high viscosity can negatively affect bearing behaviour. Evolution

8. How Speed Affects Lubricant Selection

Machine speed is another critical parameter.

Consider:

• RPM
• Shaft diameter
• Bearing size
• Surface speed
• Acceleration
• Continuous vs intermittent operation

High-speed applications

Examples:

• Electric motors
• High-speed spindles
• Turbomachinery
• Certain pumps
• High-speed bearings

These may require lubricants with characteristics that minimise excessive friction and heat generation.

Low-speed applications

Examples:

• Heavy conveyor systems
• Large gears
• Mining equipment
• Heavy machinery
• Large bearings

These may require higher-viscosity lubricants or specialised formulations capable of maintaining an adequate film under heavy loads.

SKF notes that lubricant quantity, quality and application frequency need to be properly considered in high-speed applications, where centrifugal forces can affect lubricant distribution. SKF

9. Load: Light, Medium or Heavy?

The lubricant must be capable of handling the mechanical load imposed on the component.

Ask:

• Is the load light?
• Is it continuous?
• Is it intermittent?
• Is it heavy?
• Are there shock loads?
• Are there sudden load changes?
• Is the machine subjected to vibration?

Heavy loads can require lubricants with stronger film-forming characteristics and, depending on the application, appropriate additive packages.

For example, extreme-pressure or anti-wear characteristics may be important in applications where surfaces are subjected to high contact stresses.

10. Shock Loads and Vibration

Industrial machinery rarely operates under perfectly stable conditions.

Some equipment experiences:

• Shock loading
• Vibration
• Frequent starts and stops
• Reversing motion
• Impact
• Misalignment
• Variable loads

These conditions can place additional demands on the lubricant.

For grease applications, mechanical stability becomes particularly important.

SKF identifies mechanical stability as an important parameter for greases used in applications involving high loads and vibration. SKF

11. The Operating Environment Matters

The same component may require different lubrication depending on where it operates.

Consider:

Dust

Common in:

• Mining
• Cement
• Quarries
• Construction
• Bulk material handling

Water

Common in:

• Washdown areas
• Food processing
• Steel plants
• Paper mills
• Outdoor equipment
• Marine environments

Chemicals

Common in:

• Chemical plants
• Process industries
• Manufacturing
• Refineries

Humidity

Can increase corrosion risks and influence lubricant selection.

Dirt and particulate contamination

Can interfere with lubricant performance and contribute to component wear.

SKF notes that water and other liquid contaminants can degrade lubricant properties and reduce viscosity, potentially increasing operating temperature and metal-to-metal contact. Evolution

12. Dusty Industrial Environments

Mining and heavy industrial environments can be particularly demanding.

Equipment may be exposed to:

• Fine dust
• Abrasive particles
• Moisture
• Heavy loads
• Vibration
• Shock
• Temperature variations

Examples include:

• Conveyors
• Crushers
• Screens
• Pumps
• Motors
• Gearboxes
• Wheel loaders
• Material-handling equipment

In these applications, lubricant selection should be considered alongside:

• Sealing
• Contamination control
• Lubrication frequency
• Storage
• Application method
• Condition monitoring

Simply selecting a premium lubricant does not compensate for uncontrolled contamination.

13. Water Resistance

If equipment is exposed to water, the lubricant needs to be selected accordingly.

Water can:

• Degrade lubricant performance
• Promote corrosion
• Affect grease structure
• Reduce lubricant film strength
• Increase component wear

Applications exposed to water may therefore require lubricants with suitable water resistance and corrosion-protection characteristics.

SKF specifically highlights corrosion protection and water resistance as important grease performance considerations in demanding environments. Evolution

14. Choose Between Oil and Grease

One of the first major decisions is whether the application should use oil or grease.

Oil lubrication

Oil may be preferred when:

• Continuous circulation is required
• Cooling is important
• Heat needs to be removed
• Filtration is required
• High-speed operation is involved
• The system already has an oil circulation system

Common applications:

• Gearboxes
• Hydraulic systems
• Turbines
• Compressors
• Circulating lubrication systems

Grease lubrication

Grease may be preferred when:

• Lubricant needs to remain in place
• Leakage needs to be minimised
• The component is difficult to continuously oil
• Sealing arrangements support grease lubrication
• The application is intermittent
• Simpler lubrication systems are desired

Common applications:

• Bearings
• Bushings
• Pins
• Electric motor bearings
• Conveyor components
• Industrial joints

15. Understanding Grease Consistency

Grease is commonly classified according to consistency using NLGI grades.

A simplified view is:

However, NLGI grade alone does not tell you whether the grease is suitable for a particular machine.

Two greases with the same NLGI grade can have very different:

• Base oils
• Thickeners
• Additives
• Temperature ranges
• Water resistance
• Mechanical stability
• Compatibility
• Application performance

SKF similarly cautions that modern grease selection cannot be based solely on consistency; application conditions and other performance characteristics must be considered. Evolution

16. Understand the Grease Thickener

Grease consists broadly of:

Base oil + thickener + additives

The thickener influences the grease's structure and behaviour.

Different thickener systems can have different:

• Temperature characteristics
• Water resistance
• Mechanical stability
• Compatibility
• Pumpability
• Application suitability

This is particularly important when replacing an existing grease.

Never assume:

"Both are NLGI 2, so they can be mixed."

That can be unsafe.

17. Grease Compatibility

Before switching from one grease to another, check compatibility.

This is particularly important when:

• Changing suppliers
• Standardising plant lubricants
• Replacing an obsolete product
• Introducing automatic lubrication
• Switching grease formulation
• Performing maintenance on critical equipment

Compatibility should be checked for:

• Base oil
• Thickener
• Additives
• Seals
• Bearing materials
• Operating temperature

SKF recommends verifying compatibility between lubricants as well as compatibility with sealing and bearing materials. SKF

18. Do Not Mix Greases Without Verification

Mixing incompatible greases can potentially change:

• Consistency
• Oil release
• Mechanical stability
• Temperature performance
• Lubricating ability
• Pumpability

In an automatic lubrication system, incompatibility can be especially problematic because the mixed lubricant may affect the entire distribution system.

Before changing lubricant:

1. Identify the existing lubricant.
2. Identify its base oil.
3. Identify its thickener.
4. Review the technical data.
5. Check manufacturer compatibility guidance.
6. Flush or clean the system where required.
7. Confirm the new lubricant is suitable.

19. Base Oil Selection

Lubricants can use different base oil technologies.

Common categories include:

Mineral oils

Widely used across general industrial applications.

Synthetic oils

Often selected when demanding temperature ranges, longer service life or specialised performance requirements exist.

Synthetic lubricants may offer advantages in specific high-temperature or long-life applications, but they should still be selected according to actual operating requirements rather than simply because they are "premium."

SKF identifies synthetic oils such as PAO and ester-based oils as options for demanding applications including long-life and high-temperature requirements. SKF

20. Additives: Why They Matter

Lubricants can contain additive packages designed to improve particular performance characteristics.

Depending on the application, additives may provide:

• Anti-wear protection
• Extreme-pressure protection
• Corrosion protection
• Oxidation resistance
• Detergency
• Dispersancy
• Foam control
• Rust protection

However, additives are application-specific.

An additive that is beneficial in one machine may create compatibility concerns in another.

SKF notes that additive selection, including EP/AW and corrosion-protection characteristics, should match the operating conditions when selecting oil. SKF Media Hub

21. Anti-Wear vs Extreme Pressure

These terms are often confused.

Anti-Wear (AW)

Designed to help protect surfaces under conditions where the lubricating film may become insufficient.

Extreme Pressure (EP)

Designed for applications involving severe loads and contact pressures where additional protection is required.

Typical applications may include:

• Heavy-duty gears
• Industrial gearboxes
• Highly loaded mechanisms

But EP additives are not universally suitable for every application or material.

SKF warns that some EP additives can be harmful to certain materials, including brass or polyamide cages at elevated temperatures. SKF

Therefore, always verify compatibility rather than selecting an EP lubricant simply because the machine is "heavy duty."

22. Check the Lubricant's Temperature Range

When evaluating a lubricant, look beyond the basic product name.

Review the technical data sheet for:

• Minimum operating temperature
• Maximum operating temperature
• Recommended operating range
• Dropping point for grease
• Viscosity at specified temperatures
• Viscosity index where applicable
• Thermal stability

The dropping point of a grease, for example, should not be confused with its maximum continuous operating temperature.

Always follow the manufacturer's recommended application limits.

23. Consider the Lubrication Method

The lubricant must work with the method used to deliver it.

Possible methods include:

• Manual grease gun
• Automatic single-point lubricator
• Centralised lubrication system
• Oil bath
• Splash lubrication
• Circulating oil
• Oil mist
• Drip lubrication
• Spray lubrication

A lubricant that performs well when manually applied may not necessarily be suitable for an automatic lubrication system.

SKF specifically notes that pumpability is an important grease-selection consideration for automatic lubrication systems. SKF

24. Automatic Lubrication Requires Additional Considerations

When grease is delivered automatically, consider:

• Pumpability
• Line length
• Temperature
• Pressure
• Grease consistency
• Separation characteristics
• Flow behaviour
• Delivery quantity
• Relubrication interval

A lubricant can be technically suitable for a bearing but unsuitable for the delivery system.

That is why the complete lubrication system should be evaluated rather than the lubricant alone.

25. How Much Lubricant Do You Need?

More lubricant does not necessarily mean better lubrication.

For grease-lubricated bearings, overfilling can increase:

• Friction
• Temperature
• Churning losses
• Energy consumption

Underfilling can result in:

• Insufficient lubrication
• Increased wear
• Heat generation
• Premature failure

SKF describes reliable lubrication as involving the right lubricant, right amount, right method, right time and right lubrication point. lubrication.promo.skf.com

26. How Often Should You Relubricate?

Relubrication frequency depends on the application.

Factors include:

• Bearing type
• Bearing size
• Speed
• Temperature
• Load
• Grease type
• Contamination
• Moisture
• Vibration
• Sealing
• Operating hours

There is no universal rule such as:

"Every bearing needs grease every month."

Some applications may require frequent lubrication.

Others may operate for extended periods without relubrication.

SKF notes that grease type, quantity and frequency are all important factors in reliable lubrication. Evolution

27. Consider Contamination

One of the most overlooked parts of lubricant selection is contamination control.

Contaminants can include:

• Dust
• Dirt
• Metal particles
• Water
• Chemicals
• Process fluids
• Old lubricant
• Foreign grease
• Cleaning agents

Contamination can damage both lubricant and equipment.

SKF explains that hard particles can damage bearing surfaces and shorten bearing life, while water can degrade lubricant performance. Evolution

Therefore, lubricant selection should always be accompanied by a contamination-control strategy.

28. Storage and Handling Matter Too

Even a high-quality lubricant can be compromised before it reaches the machine.

Lubricants should be:

• Stored correctly
• Kept clean
• Protected from contamination
• Properly labelled
• Protected from excessive temperature
• Kept in suitable containers
• Managed according to first-in/first-out principles where appropriate

Avoid:

• Open grease containers
• Dirty grease guns
• Unlabelled oil containers
• Mixing products accidentally
• Using contaminated transfer equipment

Lubrication quality begins before the lubricant enters the machine.

29. Check Material Compatibility

The lubricant must be compatible with the machine's materials.

Consider:

• Steel
• Stainless steel
• Aluminium
• Brass
• Copper
• Plastics
• Elastomers
• Seals
• Cages
• Coatings

SKF specifically identifies compatibility with metals, plastics and sealing materials as an important consideration in lubricant selection. SKF Media Hub

This becomes particularly important when introducing:

• New synthetic lubricants
• Strong additive packages
• Specialised greases
• EP lubricants
• Solvent-containing products
• High-temperature products

30. Food and Specialised Industries

Some industries have additional requirements.

For example, food-processing environments may require lubricants with appropriate food-grade certifications for applications where incidental food contact is possible.

SKF notes NSF H1 certification as an example of a requirement for food-processing applications where incidental contact may occur. SKF

Other industries may have requirements related to:

• Environmental protection
• Biodegradability
• Fire resistance
• Chemical compatibility
• Clean-room operation
• High temperature
• Marine exposure

Always identify regulatory and industry requirements before choosing the lubricant.

31. Lubricant Selection by Application

A practical starting point is to think about the equipment.

32. How to Choose Lubricant for a Bearing

For a bearing, collect the following information:

Step 1: Identify the bearing

Record:

• Bearing type
• Bearing designation
• Size
• Sealing arrangement
• Cage material if relevant

Step 2: Determine speed

Record:

• RPM
• Continuous or intermittent operation
• Starts/stops

Step 3: Determine temperature

Record:

• Ambient temperature
• Operating temperature
• Maximum temperature

Step 4: Determine load

Record:

• Radial load
• Axial load
• Shock loading
• Vibration

Step 5: Determine environment

Check:

• Dust
• Water
• Chemicals
• Humidity
• Outdoor exposure

Step 6: Choose grease or oil

Then evaluate:

• Viscosity
• Base oil
• Thickener
• NLGI grade
• Additives
• Temperature capability
• Compatibility

SKF's lubricant-selection systems use application conditions rather than simply searching by grease name, consistency or viscosity, reflecting the importance of matching lubricant characteristics to actual operating conditions. Evolution

33. How to Choose Gearbox Lubricant

Gearboxes are highly dependent on correct lubrication.

Consider:

• Gear type
• Gear speed
• Reduction ratio
• Load
• Operating temperature
• Ambient temperature
• Shock loads
• Gear material
• Seals
• Lubrication method
• Manufacturer specification

Gear oil selection should not be based purely on viscosity.

The additive package and compatibility with the gearbox are equally important.

34. How to Choose Lubricant for Mining Equipment

Mining environments can be especially demanding.

Consider:

Heavy loads

Equipment may experience extremely high mechanical loads.

Dust

Abrasive contamination can enter lubrication points.

Water

Rain, washdown and wet processing can introduce moisture.

Vibration

Continuous vibration can influence lubricant performance and component life.

Shock

Crushing and material-handling equipment can experience severe impact loading.

Accessibility

Some lubrication points may be difficult or dangerous to access manually.

This can make automatic lubrication systems particularly valuable where appropriate.

35. How to Choose Lubricant for Electric Motors

For electric motors, bearing lubrication requires particular attention.

Consider:

• Bearing type
• RPM
• Operating temperature
• Motor size
• Bearing manufacturer recommendations
• Grease compatibility
• Electrical motor requirements
• Relubrication quantity
• Relubrication interval

One of the biggest mistakes is assuming that any general-purpose bearing grease is suitable for every motor.

Motor manufacturers and bearing manufacturers should be consulted for application-specific requirements.

36. How to Choose Lubricant for High-Temperature Applications

High-temperature equipment can include:

• Ovens
• Furnaces
• Kilns
• Steel-processing equipment
• Hot conveyors
• High-temperature bearings
• Industrial dryers

Consider:

• Continuous temperature
• Peak temperature
• Oxidation resistance
• Evaporation
• Base oil technology
• Thickener stability
• Relubrication requirements

A lubricant's published maximum temperature should be interpreted in the context of actual operating conditions and application requirements.

37. How to Choose Lubricant for Wet Environments

For equipment exposed to water, evaluate:

• Water resistance
• Corrosion protection
• Adhesion
• Mechanical stability
• Washout resistance
• Temperature range

Typical applications include:

• Paper mills
• Steel plants
• Food processing
• Marine environments
• Outdoor conveyors
• Mining
• Wastewater facilities

The objective is not simply to find a "waterproof grease."

The complete system—including seals, application method and contamination control—must be considered.

38. Common Mistakes When Selecting Industrial Lubricants

Mistake 1: Choosing the cheapest lubricant

The purchase price is only one part of lubrication cost.

A cheaper lubricant that causes more frequent failures can become significantly more expensive.

Mistake 2: Assuming expensive means better

Premium lubricants are not automatically suitable for every application.

The right lubricant is the one that matches the machine.

Mistake 3: Choosing only by viscosity

Viscosity is important, but it is not the entire selection process.

Also consider:

• Temperature
• Load
• Speed
• Additives
• Base oil
• Contamination
• Compatibility

Mistake 4: Mixing different greases

Never assume compatibility.

Verify it first.

Mistake 5: Over-greasing bearings

More grease is not necessarily better.

Excessive grease can increase friction and heat.

Mistake 6: Ignoring contamination

Even a high-quality lubricant can perform poorly when contaminated.

Mistake 7: Ignoring operating temperature

Selecting lubricant based only on ambient temperature can result in incorrect viscosity or temperature performance.

Mistake 8: Using the same lubricant everywhere

Standardisation can be useful, but excessive standardisation can be dangerous.

A hydraulic system, gearbox, electric motor bearing and chain do not necessarily require the same lubricant.

Mistake 9: Ignoring manufacturer recommendations

Equipment and bearing manufacturers often provide specific lubrication requirements.

These should be reviewed before selecting an alternative product.

39. Lubricant Selection Checklist

Before purchasing an industrial lubricant, answer these questions:

Equipment

• What machine is being lubricated?
• What component is being lubricated?
• What is the component manufacturer's recommendation?

Operating conditions

• What is the operating temperature?
• What is the ambient temperature?
• What is the operating speed?
• What is the load?
• Is there shock or vibration?

Environment

• Is there dust?
• Is there water?
• Is there humidity?
• Are chemicals present?
• Is corrosion a concern?

Lubricant

• Oil or grease?
• What viscosity?
• What NLGI grade?
• What base oil?
• What thickener?
• What additive package?
• What temperature range?
• What certifications are required?

Compatibility

• Is it compatible with the existing lubricant?
• Is it compatible with seals?
• Is it compatible with bearings?
• Is it compatible with machine materials?

Application

• Manual?
• Automatic?
• Centralised?
• Oil bath?
• Circulating?
• Spray?

Maintenance

• How much lubricant is required?
• How frequently should it be applied?
• How will contamination be controlled?
• How will lubricant condition be monitored?

If these questions cannot be answered, the lubricant selection is probably not yet complete.

40. A Simple Industrial Lubricant Selection Process

A practical selection process can be reduced to seven stages.

Stage 1 — Identify the component

Bearing, gearbox, chain, hydraulic system, compressor, etc.

Stage 2 — Collect operating data

Temperature, speed, load and operating hours.

Stage 3 — Identify environmental conditions

Dust, water, chemicals, humidity, vibration and contamination.

Stage 4 — Determine lubricant type

Oil, grease, paste or specialised lubricant.

Stage 5 — Define technical requirements

Viscosity, NLGI, base oil, thickener, additives, temperature range and certifications.

Stage 6 — Verify compatibility

Check existing lubricant, seals, materials and equipment.

Stage 7 — Validate the selection

Where the application is critical or unusual, involve the equipment manufacturer, bearing manufacturer or lubricant technical specialist.

41. Lubricant Selection Example: Conveyor Bearing

Imagine a conveyor bearing operating in a mining environment.

The conditions are:

• Continuous operation
• Heavy load
• Moderate speed
• High dust
• Occasional water
• High vibration
• Difficult manual access

A basic selection approach would be:

Component: Rolling bearing

↓

Lubricant: Grease

↓

Environment: Dust + water

↓

Mechanical conditions: Heavy load + vibration

↓

Required properties: Suitable mechanical stability + water/corrosion resistance + appropriate temperature capability

↓

Delivery: Potential automatic lubrication

↓

Compatibility: Verify existing grease and bearing materials

↓

Quantity/frequency: Determine from bearing and operating conditions

This is much more reliable than simply asking:

"Which grease is best?"

42. Lubricant Selection Example: High-Speed Motor Bearing

Consider a high-speed electric motor.

Conditions:

• High RPM
• Moderate load
• Continuous operation
• Elevated bearing temperature
• Clean indoor environment

The selection priorities may include:

• Correct grease type
• Appropriate base-oil viscosity
• Temperature capability
• Low friction characteristics
• Bearing compatibility
• Correct grease quantity
• Correct relubrication interval

The goal is not to choose the heaviest grease available.

It is to choose a lubricant that performs correctly at the actual operating speed and temperature.

43. Lubrication and Energy Efficiency

Lubrication can also influence energy consumption.

Incorrect viscosity, excessive lubricant quantity or poor lubrication can increase friction and heat generation.

For this reason, lubrication should be viewed as part of equipment efficiency—not simply maintenance.

SKF's lubrication guidance links proper lubrication management with production uptime and energy-related performance. lubrication.promo.skf.com

44. Lubrication and Preventive Maintenance

A lubricant should not be selected in isolation.

It should become part of a complete lubrication program.

A good program should define:

• Lubrication points
• Lubricant specification
• Lubricant quantity
• Application method
• Application frequency
• Responsible personnel
• Storage requirements
• Contamination-control procedures
• Inspection requirements
• Lubricant-condition monitoring
• Replacement procedures

This transforms lubrication from a reactive maintenance task into a controlled engineering process.

45. Lubrication and Predictive Maintenance

Modern industrial maintenance increasingly combines lubrication with condition monitoring.

Possible monitoring methods include:

• Temperature monitoring
• Vibration analysis
• Oil analysis
• Grease inspection
• Particle analysis
• Visual inspection
• Acoustic monitoring

Unexpected changes can indicate:

• Lubricant degradation
• Contamination
• Bearing wear
• Excessive load
• Misalignment
• Over-lubrication
• Under-lubrication

The objective is to identify problems before they become production failures.

46. Building a Lubricant Standardisation Program

Large plants may use dozens or even hundreds of lubricant products.

This can create:

• Inventory complexity
• Storage problems
• Wrong-lubricant application
• Compatibility risks
• Training difficulties
• Higher purchasing costs

A lubricant standardisation program can help reduce unnecessary product variety.

However, standardisation should be based on engineering compatibility.

A good process is:

1. Audit all current lubricants.
2. Identify applications.
3. Identify duplicate products.
4. Review technical requirements.
5. Identify possible standard products.
6. Verify compatibility.
7. Establish colour/label coding.
8. Train maintenance teams.
9. Update lubrication charts.
10. Monitor results.

47. The Five Rights of Industrial Lubrication

A useful way to remember good lubrication practice is:

Right lubricant

Use the lubricant that matches the application.

Right quantity

Apply the correct amount.

Right method

Use the correct delivery system.

Right time

Follow an appropriate lubrication interval.

Right lubrication point

Ensure the lubricant actually reaches the intended component.

SKF uses this five-right framework in its lubrication-management guidance. lubrication.promo.skf.com

48. Industrial Lubricant Selection Quick Reference

49. Frequently Asked Questions

What is the most important factor when choosing an industrial lubricant?

There is no single factor that applies to every application. However, operating conditions—especially temperature, speed, load, component type and environment—are fundamental to correct selection.

Is higher viscosity always better?

No.

Higher viscosity can provide a thicker lubricant film in suitable applications, but excessive viscosity can increase friction, heat and energy consumption. The required viscosity should be determined based on the actual application and operating temperature. Evolution

Can I use the same grease for every bearing?

Not necessarily.

Different bearings can have different speed, load, temperature, sealing and environmental requirements.

Can two NLGI 2 greases be mixed?

Not automatically.

NLGI grade only describes grease consistency. Two NLGI 2 greases can use different base oils, thickeners and additive systems.

Compatibility should be verified before mixing.

Is synthetic lubricant always better than mineral lubricant?

Not necessarily.

Synthetic lubricants can offer advantages in certain demanding applications, but lubricant selection should be based on the actual operating conditions and required performance.

How often should industrial equipment be lubricated?

There is no universal interval.

The correct interval depends on the component, lubricant, temperature, speed, load, contamination, operating hours and lubrication method.

Can over-lubrication damage equipment?

Yes.

Over-lubrication can increase friction and operating temperature and may contribute to premature bearing failure. lubrication.promo.skf.com

What happens if lubricant becomes contaminated?

Contamination can reduce lubricant effectiveness and accelerate component wear.

Water, dust and solid particles can be particularly damaging to bearings and other precision components. Evolution

Should lubricant selection be based only on the manufacturer's brand?

No.

Brand is only one consideration. The lubricant should meet the technical requirements of the application.

However, manufacturer recommendations should always be reviewed before replacing an approved lubricant.

How do I select grease for a mining application?

Start by evaluating:

• Bearing/component type
• Load
• Speed
• Temperature
• Dust
• Water
• Vibration
• Shock loading
• Grease compatibility
• Lubrication method

Then select a grease whose technical characteristics match those conditions.

50. Final Lubricant Selection Checklist

Before approving an industrial lubricant, make sure you know:

☐ Component type

☐ Manufacturer recommendation

☐ Operating temperature

☐ Ambient temperature

☐ Operating speed

☐ Load

☐ Shock/vibration

☐ Dust contamination

☐ Water exposure

☐ Chemical exposure

☐ Oil or grease requirement

☐ Required viscosity

☐ NLGI grade where applicable

☐ Base oil

☐ Thickener

☐ Additive package

☐ Temperature capability

☐ Material compatibility

☐ Seal compatibility

☐ Existing lubricant compatibility

☐ Application method

☐ Lubricant quantity

☐ Relubrication interval

☐ Required standards/certifications

☐ Storage and handling requirements

☐ Condition-monitoring requirements

If these factors have been evaluated, the lubricant selection is much more likely to deliver reliable performance.

Conclusion

Choosing the right industrial lubricant is an engineering decision—not simply a purchasing decision.

The best lubricant depends on the specific machine, component and operating conditions.

Temperature, viscosity, speed, load, contamination, water exposure, vibration, lubricant compatibility, additive requirements and application method all play important roles.

The most effective approach is to start with the machine and work backwards toward the lubricant specification.

Instead of asking:

"Which lubricant should we buy?"

ask:

"What does this application require from its lubricant?"

That change in approach can help maintenance teams reduce unnecessary wear, improve equipment reliability, control lubrication costs and reduce the risk of unexpected downtime.

For demanding industrial applications, lubricant selection should be supported by equipment specifications, lubricant technical data and, where necessary, advice from qualified lubrication or application specialists.

Need Help Choosing the Right Industrial Lubricant?

Selecting the correct lubricant for a bearing, gearbox, conveyor, motor, pump, mining machine or other industrial application requires understanding the actual operating conditions.

At LECA, technical product knowledge and application-focused solutions can help businesses identify suitable industrial maintenance products for demanding environments.

Explore Industrial Lubrication Solutions

Request a Quote

Talk to a LECA Technical Expert

Sources & Technical References

• SKF — Lubrication and lubricant-selection guidance. SKF Media Hub
• SKF — Lubrication basics and grease-selection criteria. SKF
• SKF — Lubricant selection and compatibility guidance. SKF Media Hub
• SKF — Bearing contamination and lubricant degradation. Evolution
• SKF — Lubrication management and the five rights of lubrication.

Explore Industrial Automation Products

Request a Quote

Talk to a Spleca Technical Expert