Technical Resources for Precision Lubrication

Practical guidance for grease selection, linear motion lubrication, tribology, testing and application validation.

Explore technical guides, application knowledge, test methods, product documentation and maintenance resources for precision motion systems.

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Featured Technical Resources

Start with our most useful guides for precision motion lubrication.

Selection Guide 8 min read

How to Select Grease for Linear Guides

Determine the right lubrication strategy based on load, speed, and environmental exposure.

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Application 6 min read

Understanding Fretting Wear in Short-Stroke Motion

Analyze the causes of fretting corrosion and how specific grease formulations mitigate wear.

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Application 5 min read

How Grease Affects Ball Screw Temperature

Evaluate the relationship between base oil viscosity, stirring resistance, and thermal expansion.

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Cross Reference 10 min read

How to Evaluate an Alternative Grease

A systematic approach to comparing technical data, compatibility, and running machine trials.

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Selection Guide 7 min read

Grease Selection for Clean & Low-Dust Applications

Understand particle generation and select stable-torque grease for semiconductor environments.

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Fundamentals 4 min read

Can Different Greases Be Mixed?

Examine thickener compatibility charts and the risks of mixing lithium and urea greases.

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Selection Guide 6 min read

Low-Friction Grease for High-Speed Linear Motion

Optimize kinematic viscosity to reduce torque and heat generation at high velocities.

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Selection Guide 7 min read

Grease Selection for Ball Screws

Key considerations for maintaining oil film thickness under heavy axial loads.

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Understanding Lubricant Testing

Learn what laboratory tests can — and cannot — tell you about grease performance.

Must Read

JIS vs ASTM Grease Testing: Can the Results Be Compared?

Some JIS and ASTM methods test similar properties, but similar test purpose does not automatically mean identical numerical results. Different test conditions should not be converted using an arbitrary formula.

The strongest comparison is often obtained by testing the reference grease and candidate grease using the same laboratory, equipment, method and conditions.

Read Full Analysis

From Laboratory Data to Application Validation

A laboratory result should support application evaluation, not replace it. TRG follows a structured validation process.

Phase 1

Technical Data

Phase 2

Comparative Testing

Phase 3

Tribology Testing

Phase 4

Component Trial

Phase 5

Long-Term Qual.

Evaluating an Alternative Grease?

Changing grease should be based on application requirements, compatibility and validation — not only on matching a product name.

  • Chemical similarity does not automatically prove application equivalence.
  • Physical properties are only one part of the evaluation.
  • Compatibility with the existing lubricant must be considered.
  • Machine-level testing may be required for critical axes.
Request a Cross Reference

Send us your current grease model for engineering review.

Technical Documents

Access available product documentation for engineering evaluation.

Document Name Product Type Language Action
FN Ⅰ Technical Data Sheet FN Ⅰ TDS English Download PDF
FN Ⅱ Safety Data Sheet FN Ⅱ SDS English Download PDF
FN Ⅲ Fretting Test Report Summary FN Ⅲ Test Report English Available on Request
Linear Guide Application Guide Multiple App Guide English Download PDF

Frequently Asked Lubrication Questions

What grease should I use for a linear guide?

The ideal grease depends heavily on the operating conditions. For standard applications, a lithium-soap grease with mineral oil (viscosity around 100 cSt at 40°C) is common. However, for high-speed motion, low-dust environments, or short-stroke repetitive movements, specialized greases (like urea-thickened or low-viscosity synthetic oils) are required.

Read our full Linear Guide Selection Guide →
Can lithium and urea greases be mixed?

Generally, no. Mixing different thickener types (like lithium and urea) can cause structural incompatibility. This often leads to severe softening of the grease, excessive oil separation, and ultimately lubrication failure. Always purge the old grease or consult compatibility charts before changing.

Learn more about Grease Compatibility →
What causes fretting corrosion in linear motion?

Fretting wear typically occurs in short-stroke or micro-oscillation applications where the rolling elements do not make a full revolution. The lubricant is squeezed out of the contact zone, and micro-welding/oxidation occurs between the metal surfaces, often appearing as reddish-brown dust. Specialized greases with specific channeling properties and additives are needed to mitigate this.

Read: Understanding Fretting Wear →
Can two greases with similar TDS data be considered equivalent?

Not necessarily. A Technical Data Sheet (TDS) provides typical physical properties (like penetration and dropping point) based on standardized static tests. It does not reveal the exact additive package, the manufacturing process, or how the grease behaves dynamically in a specific machine component over time. Machine-level testing is often required for critical replacements.

How to evaluate a replacement grease →

Can’t Find the Answer?

Tell us your component, operating condition or current lubricant and our engineering team will help identify the technical information or candidate grease you need.

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Turn Technical Information into an Application Decision

Share your machine, component, operating conditions and current lubricant. TRG can help identify a candidate grease for further evaluation.

For industrial users, machine builders, OEMs and technical distributors.