Damage caused by the incompatibility of paint and oil
If paint and gear oils are not compatible, the paint will loosen after contact with the gear oil. This will shorten oil change intervals and could clog filters. In the worst case, it could even lead to gear damage caused by clogged oil feeds or blocked rolling elements.
Why choose a two-component paint for industry gearboxes?
If the gear oil is not compatible with the paint, suitable oil should have priority over paint, i.e. it is better to change the inside paint to be compatible with oil rather than changing over to an oil with poorer performance.
The reason is that high performance gear oils such as polyglycole or polyalphaolefine are essential for the protection of machine elements as they can reduce friction and prolong the machine elements’ service life.
Normally, two-component paint is preferred for industry gearboxes as it is compatible with most gear oils and also offers much longer service life.
Paint compatibility test according to DIN EN ISO 2409 – cross-cut test
According to DIN EN ISO 2409, paints are compatible with an oil if less than 5 % of the paint on a plate is loosened by the oil, i.e. if their rating is either 0 or 1 on a scale from 0 to 5.
Those intended for application in the cement and wind power industries or power plants.
Leading gearbox manufacturers like SEW, Flender Hansen, Moventas, Boston or Baldor use two-component paints for the production of their gear boxes, especially for