Wear testing can be a long process, especially if specimen are lubricated and lightly loaded, however, timescales can be greatly reduced through use of high frequency sliding. This kind of test can prove useful for the screening of materials, lubricants, and surface coatings. An electrical oscillator is powered by a sine wave signal generator. The oscillator drives the slider across a stationary counter face. The slider is dead weight loaded.
Reciprocating frequency, load, and stoke length can all be varied. The friction force (with sinusoidal variation) can be measured on an attached force transducer.
- Stroke length: 100um - 5mm (depending on load and frequency)
- Max frequency: 200Hz (low load)
- Load: <50N (at low frequency)
- Typical contact pressures: 0.1 - 1GPa
- Test conditions: Elevated temperature and corrosive/toxic environment testing possible
- Specimen dimensions: not critical. Typically flat specimens 1cm x 1cm x 5mm against 5mm diameter ball
- Lubricant evaluation for animal hair clippers
- Wear testing of hard coated surfaces
- Wear resistance of anti-friction anodised aluminium grain chutes
- Abrasion resistance of PEEK valve seats
- Load capacity of acetal bearing surfaces