MASTERIS is marketing a new solution for modifying the Greisseur de Boudin (GRB) system on bogies developed by SNCF, in order to implement a major technical and ecological transition.

Faced with Shell's announced 2026 end to production of the bitumen oil used to lubricate the bogies of most rail vehicles, MASTERIS has positioned itself alongside Eurostar Group to anticipate this major technical transition.

Wheel flange lubrication, integrated into the SEF function, plays a key role in reducing axle and rail wear, thus contributing to the reliability and longevity of rolling stock.

For several months now, SNCF has been working on the widespread use of a new eco-compatible grease, with enhanced properties: biological, non-toxic, more efficient and limiting underbody pollution. While this new grease is already in use on some recent equipment, older trains require the adaptation or complete replacement of the lubrication system.

In this context, MASTERIS is leading the development of a new GRB system for the PBA and PBKA TGV trains operated by Eurostar Group. This major technical operation mobilizes the joint expertise of CIC and CIM, and includes the following services:

• Complete technical studies for the new system,
• Bogie and train experiments,
• Update technical drawings,
• Handling admission procedures related to material changes,
• Supply of parts for the first modified trainsets.