A stationary bearing roller with a diameter of 9.5 [mm] is pressed against a rotating cylinder with increasing force, measured on a scale that is installed on a "quasi-falex" lever with a ratio of 10:1 — meaning that the actual force pressing the roller against the cylinder is 10 times greater than the force indicated by the scale.
The load increases until the lubricating oil film breaks, ultimately leading to the roller and the cylinder getting heat-welded together and causing the rotation to stop.
The bearing roller test allows for visual and quantitative comparison between lubricants by assessing the dimensions of the groove formed on the stationary roller for each tested lubricant.
On the other hand, the amperemeter connected to the electric engine clamps indirectly indicates the resistance the engine must overcome, thus the friction reduction for each tested lubricant.
- No lubricant
- Popular lubricant