Rubber Coefficient Of Friction Table

The only way to determine the accurate coefficient of friction between two materials is to conduct experiments.

Rubber coefficient of friction table. The sliding lubricated values must be used with extreme care. For example static friction can prevent an object from sliding down a sloped surface. F f frictional force n lb. N normal force between the surfaces n lb there are at least two types of friction forces.

Coefficients of friction between materials are best determined through testing. The static and kinetic friction coefficient values reference table shown in this article will be helpful for finding the cof values of commonly used materials. Friction coefficient table of solid lubricants metals plastics and anti friction materials. F r rolling resistance or rolling friction n lb f c rolling resistance coefficient dimensionless coefficient of rolling friction crf w m a g normal force or weight of the body n lb f m mass of body kg lb a g acceleration of gravity 9 81 m s 2 32 174 ft s 2 the rolling resistance can alternatively be expressed as.

Where μ s is the coefficient of static friction and μ k is the coefficient of kinetic friction. Dry steel dry steel 0 70 0 57 0 80 greasy steel dry steel 0 23 0 16 0 90. Static and kinetic coefficient of friction. Static friction is friction between two or more solid objects that are not moving relative to each other.

Material 1 material 2 coefficient of friction. Friction coefficient table for various material pairs in atmosphere and vacuum see the definition of friction coefficient is shown below the data was collected from various sources 1 2 3. All values are approximate and are only suitable for guidance only. Rubber doesn t have a single constant coefficient of friction.

F f μ n 1. Showing the concept of coefficient of friction. A table below shows approximate friction coefficients for various materials. However it is possible to find tables in the literature for friction coefficients between various materials.

The coefficient of static friction typically denoted as μ s is usually higher than the coefficient of kinetic friction. The coefficient depends on temperature and other things. μ static μ s or kinetic μ k frictional coefficient. The friction force is the force exerted by a surface when an object moves across it or makes an effort to move across it.

The value of μ s is generally higher than the value of μ k for a given combination of materials. Coefficient of friction dry lubricated test method static sliding static sliding note. The frictional force can be expressed as. References learn more about contacts.