A friction tester is a type of testing equipment which is used to measure the coefficient of friction for specific materials. It is generally determined to be the ease by which two surfaces slide against each other. There are two different types of coefficient friction testers which includes a static coefficient of friction and kinetic coefficient of friction. The main use for a coefficient of friction testing is in the processes of production, transportation and marketing and due to this, it is widely valued.
Static friction or coefficient
Static friction is the force that holds back a stationary (non-moving) object up to the point where it eventually starts to move. On the other hand, the static coefficient involves the force restricting the movement of an object that is not moving on a relatively hard but smooth surface. This is calculated by discovering the initial peak force required to move the sled and further dividing the value by the weight.
Kinetic friction or coefficient
Kinetic friction follows static friction and is the force holding back regular motion. The kinetic coefficient involves the force restricting the movement of an object that is sliding (moving) on a smooth but hard surface. This is calculated by finding the average load during the test and dividing this by the weight of the sled (which holds the other material).
How is friction measured using the coefficient friction tester?
A sample of 63.5mm² with weight acting over the entire surface area is moved over another sample at a given speed. Both static and dynamic coefficient of friction are automatically calculated and displayed on a screen.