Pin-on-Disc

The tribological behavior of two gliding partners is investigated by pressing a pin against a disc and simultaneously moving it horizontally. Both sliding partners are usually in liquid, which is held back by a Plexiglas cylinder and whose temperature is regulated by a thermostat. The load and movement patterns are programmable in order to simulate the wear of surfaces under controlled conditions. The abrasion is determined gravimetrically and/or optically by means of profilometry.

Screening of bearing couples for artificial joint replacement (orthopaedic applications)
Example: Polished CoCr discs vs. UHMWPE pins in simulated sinovial fluid

What needs to be considered with this method with regard to the samples?

Suitable specimens: Hard gliding partner (metal or ceramic disc), soft gliding partner (polymer or cartilage pin)

Specimen specifications: Disc diameter up to 43 mm (plane-parallel), pin diameter up to 9.5 mm (15‑20 mm long)

Measuring range/options: Vertical force up to 400 N, speed up to 160 mm/s. Fluid temperature up to 50 °C.

Which products can be tested at the RMS?

We test all possible material pairings in different liquids. Contact us and we will discuss your individual problem.

Are all tests carried out by RMS?

This wear test is carried out by RMS and can be supplemented with other RMS analysis techniques (e.g. determination of friction coefficients with the rotation tribometer or surface topography).