Coefficient Of Friction Rubber On Steel

Lower durometers have higher coefficients.

Coefficient of friction rubber on steel. Dry steel dry steel 0 70 0 57 0 80 greasy steel dry steel 0 23 0 16 0 90 greasy steel greasy steel 0 23 0 16 0 90 dry aluminiumdry steel 0 70 0 50 0 85 dry aluminiumgreasy steel 0 23 0 16. 1 2 2 static friction in rubber pad forming processes 3 1 3 static friction and tribological system 3 1 3 1 static friction introduction 3 1 3 2 static friction and tribological system 4 1 4 outline of the dissertation 5 2. Compared to steel silicone rubber is 2 to 7 times greater. Static friction is friction between two or more solid objects that are not moving relative to each other.

For example static friction can prevent an object from sliding down a sloped surface. Dynamic coefficient of friction and restitution. Showing the concept of coefficient of friction. The value of μ s is generally higher than the value of μ k for a given combination of materials.

However it is possible to find tables in the literature for friction coefficients between various materials. μ static μ s or kinetic μ k frictional coefficient. References learn more about contacts. Static friction results from the normal force of two objects in contact acting opposite the intended motion of one surface against the other.

Ref links 1 below the american gear manufactures association agma recommends a value of between 0 12 0 15 for hydraulically expanded hubs and 0 15 0 20 for shrink or press fit hubs. Coefficients of friction between materials are best determined through testing. The frictional force can be expressed as. F f μ n 1.

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. These companies can provide surface coating fluids containing particles to increase the coefficient of friction i e. N normal force between the surfaces n lb there are at least two types of friction forces. The coefficient of friction of silicone rubber ranges from less than 0 25 to more than 0 75.

Static and kinetic coefficient of friction. F f frictional force n lb. Steel is about 10. The texture can be used to reduce the co efficient of friction.

Where μ s is the coefficient of static friction and μ k is the coefficient of kinetic friction. 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. The coefficient of static friction typically denoted as μ s is usually higher than the coefficient of kinetic friction. The maximum force of static friction can be calculated by multiplying the normal force by the coefficient of friction specific to the pair of materials in contact.