A ball-on-disc instrument for measuring the frictional properties of lubricated and unlubricated contacts under an applied electrical potential, and a wide range of rolling and sliding conditions.

The MTM-EC upgrade allows for novel investigations into effects of electric potentials on tribological contacts.

User-provided oscilloscopes and power supply units allow for extensive customisation.

The ball and disc specimens are electrically isolated, allowing either specimen to act as the anode or cathode.

Independently driven specimens enable a wide range of contact conditions to be replicated across all three lubrication regimes.