The slide bearing's friction coefficient is an interesting dimensioning parameter since it controls the size of losses in the bearing. The friction coefficient, which has no units, is normally referred to as µ. The friction coefficient is determined from the equation below.
Where Ff is the friction force and F the radial bearing load.
A slide bearing's lifetime is strongly influenced by the friction. With increased friction, the resistance, and thereby the heat development, and the wear increases.
It is a well-known phenomenon that the start friction is significantly greater than the operating friction. To take preventive measures against this, D&E has products that during operation build up a lubricating film that during stoppages collects in lubrication indents and in this way contributes to a greatly reduced start friction.