The science of interacting surfaces in relative motion, including friction, lubrication, and wear.


Combining fundamental Tribology knowledge with a deep understanding of the design and operation of machine components.

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Engineering Tribology Experts: Neale Consulting Engineers

We apply Tribology to investigate machinery problems and failures. Discover why Tribology expertise can ensure machines operate safely and reliably - and how we can solve your next machinery problem.

Practical Solutions to Engineering Problems

Checking Designs

We regularly do Design Audits to assess ''fitness for purpose'' of mechanical designs - helping to prevent future failure and malfunction. We use Engineering Tribology know-how coupled with first-principle analysis to ensure machine reliability.

Solving Machine Failures

We have over 50 years of experience in diagnosing and mechanical and tribological failures in all industries and in any part of the world. These include: bearing failures, gear failures, seal failures, and any problems involving the moving parts of machinery.

Writing Useful Guide Books

We have distilled our extensive experience of machine operation and mechanical failure analysis into books and technical articles. These are used by Mechanical Engineers as reference texts for the design and analysis of machine elements including bearings, gears and seals.

Appearing In Court

We act as engineering expert witnesses for litigation purposes, where we deliver authoritative and unbiased opinion. Most cases involve failures of machinery and we also deal with Patent disputes and project disputes.

Engineering Calculation

We regularly do detailed engineering analyses of machine elements, bearings and structures. Our analysis capability complements our Tribological understanding and our practical knowledge of machinery design and operation.

Operating Worldwide

We carry out assignments all over the world. When appropriate we work remotely for economy, but frequently we travel to international locations to investigate and inspect, or to present our findings or give expert evidence in court hearings.

Sharing Our Knowledge

Image of the cover of the tribology handbook

The Tribology Handbook 2nd Edition

Ever since it was first published 20 years ago, The Tribology Handbook has been a reference ''Bible'' for engineers the world over.

What the Book Provides

It gives instant access to essential information on the selection, design and performance of Tribological components, including their practical limitations, and failure modes and causes.

And Who it's For

It is primarily aimed at designers and engineers in industry. Additionally, operators of machines should find the book extremely helpful, because it provides an atlas of component performance, invaluable for maintenance and troubleshooting.

Order Your Copy Today

The Tribology Handbook is published by Elsevier. ISBN 0 7506 1198 7. It can also be purchased from Amazon We are pleased to be able share selected pages here .

Working With You


Neale Consulting Engineers Ltd. provides impartial advice and has no ties to manufacturing companies. We aim to complement the expertise and knowledge that our clients have in-house, and we work closely with the client.


Our opinion is accepted internationally by companies, courts of law and governments. Neale Consulting Engineers have acted as Expert Witness in many international legal cases. We work for organisations that seek an un-biased opinion.


Neale Consulting Engineers offer rapid response for failure and wear investigations. Usually we can mobilise an inspector or investigator within 24 hours for urgent matters.

Latest Articles

Image of an internal combustion engine piston

Piston Ring Design and Operation

This page is intended to help designers and development engineers with the solution of practical problems, involving the pistons and rings of internal combustion engines. It represents a distillation of the contents of about 100 reports and articles which contain useful data, but have probably not been read by many engineers in industry.

The Mechanisms of Piston Ring Operation

This article of the attempts to condense the available data on the various aspects of piston ring performance into a more complete and readable form than that in which it is otherwise available.

Methods of Designing Piston and Ring Assemblies

This article summarises the design methods for sizing of piston and piston ring assemblies.  It details the design requirements for pistons and rings, typical arrangements depending on the type of engine and the detailed design formulae required for an initial piston and ring design.

Neale Consulting Engineers - Solving Mechanical Failures For Over 50 Years

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