Slide show of machines that use gears
Welcome to the
British Gear Association

Recent Research Projects


Project 6 Phase 3 : Micropitting ...

Project 6 Phase 3: Increasing the Micropitting Threshold Stress and Reducing the Micropitting Wear Rate in Gears

This programme of work followed on from the results of Project 6 Phases 1 and 2 which enabled the BGA Consortium to gain a better understanding of gear micro-pitting. The Phase 1&2 research work has made clearer what the most influential variables linked to micro-pitting are and therefore which parameters needed to be investigated to a greater depth to further develop understanding and design tools.

A range of influencing features were investigated by the research consortium covering surface texture, surface coatings, oil types, micro-pitting threshold stress, gear materials, surface treatments, micro-pitting wear rate and the effects of different geometry modifications. With the support of the Consortium members, the BGA, Cardiff University, MoD (Navy) and Intertek(formerly QinetiQ), a programme of work covering all of the above topics was prepared. The programme of work officially commenced in September 2010 and the project formally completed with the Final Presentation taking place at Newcastle University on Wednesday 19 November 2014. The final project report was published on 25 April 2015.

Project 11: Materials ...

Project 11: Materials for Enhanced Gear Bending Fatigue Performance

This research programme is a further development of the previous gear material strength research projects aimed at improving the fatigue properties of gears which is based on the work presented from Project 5 and Project 5B. This latest body of work is strongly materials-focused and is concentrating on evaluating gear tooth bending fatigue strength using single tooth pulsator testing. The variables to be investigated include the base steel type, heat treatment method and post heat treatment processing. The research considers several heat treatment types and methods of processing in combinationwith variation in base steel type. Specifically gas case carburising, vacuum case carburising and nitriding are being evaluated with some additional surface treatment effects by means of modified shot peening.

The programme of work officially commenced during September 2010. The work has now concluded and the final presentation took place at the Design Unit, Newcastle University on 24 June 2014.

The full final report package was issued electronically to consortium members on 10 October 2014.