FALEX – 4 ball test

Oct 11, 2023

We are one of the few to boast a new laboratory facility that will bring us a further advance in our development. Oil, additives and more have a major impact on reducing friction and wear on machine components. Lubricity is used to determine the advantages and disadvantages of the final products and then to classify them into performance groups.

The 4-ball test is used to characterize the properties of lubricants such as WP and EP additives.

The device consists of 4 balls that are built into a “pyramid”. The base consists of 3 balls which are fixed and on this base the last ball, the fourth one, is built. The test is carried out by rotating and rotating the upper ball in contact with the lower base of the balls, which are in a fixed position, to test the lubricant’s ability to function under extreme pressure.

The test starts at low load, at which the lubricant works well, a good protective film is formed and of course no choking is detected. The load starts to increase gradually according to the prescribed standard until a jam is detected or the load is increased. This point actually means that the oil can no longer form a protective film between the two surfaces.

Based on these tests, the product can be further modified or developed, because any intervention in the base of the tested product will be immediately visible in the following results.


  • Speed range: 1 – 1 800 RPM
  • Standard load: 1 – 800 kg
  • Programmable temperature control up to 200°C
  • Time-dependent testing
  • Friction system with a range of 0 – 250 lbs