Roy Mech - An Engineering Encyclopedia

This is the new Roymech website under some major changes to make it more user friendly with the above drop down menu and we will be adding new pages after its overhaul. Some of the pages will look like the old roymech but they will be updated shortly. We are also adding breadcrumbs to every page to aid navigation through the site. Future improvements include; search box, an area on the site showing the recent updates, calculators, machinery risk assessment and many more......

Engineers from the past and present day

What is an Engineer...?

There are many definitions of what is an engineer, but too many people nowadays claim to be one!

Engineers, as practitioners of engineering, are professionals who invent, design, analyze, build and test machines, complex systems, structures and materials to fulfill functional objectives and requirements while considering the limitations imposed by practicality, regulation, safety and cost.

British school children in the 1950s were brought up with stirring tales of "the Victorian Engineers", chief among whom were Brunel, Stephenson, Telford, and their contemporaries. In the UK, "engineering" has more recently been erroneously styled as an industrial sector consisting of employers and employees loosely termed "engineers" who include tradespeople. However, knowledgeable practitioners reserve the term "engineer" to describe a university-educated professional of ingenuity represented by the Chartered (or Incorporated) Engineer qualifications (although i do not believe that you need a degree to be an Engineer, like my Dad, a Tool Maker, a brilliant Engineer). A large proportion of the UK public incorrectly thinks of "engineers" as skilled tradespeople or even semi-skilled tradespeople with a high school education. Also, many UK skilled and semi-skilled tradespeople falsely style themselves as "engineers". This has created confusion in the eyes of some members of the public in understanding what professional engineers actually do, from fixing car engines, television sets and refrigerators (technicians, handymen) to designing and managing the development of aircraft, spacecraft, power stations, infrastructure and other complex technological systems (engineers).

What's available on Roymech?


Engineer Directives including CE Marking, Machinery Directive, Pressure Equipment Directive, Low Voltage Directive, EMC (Electro Magnetic Compatibility), ATEX, LOLER (Lifting Operations and Lifting Equipment Regulations), CDM (Construction Design and Management), PUWER (The Provision and Use of Work Equipment Regulations), Noise at Work Regulations & COSHH (Control of Substances Hazardous to Health Regulations).
Environmental Standards
Reliability / Safety


Keyways /Splines
Shafts & Fits
Surface Finish



Science / Maths



Online Calculators

Manufacturing Processes