What is a first class lever?
First-class levers have the fulcrum between the force and the load. In using a screwdriver to lift the lid from a paint tin you are moving the effort over a greater distance than the load. By having the fulcrum (the rim of the tin) close to the lid (the load) a larger force can be applied to the load to open the tin.
This means you are reducing the effort required, this is what first-class levers do best. Other examples of first-class levers are pliers, scissors, a crowbar, a claw hammer, a see-saw, and a weighing balance.
In summary, in a first-class lever, the effort (force) moves over a large distance to move the load a smaller distance, and the fulcrum is between the effort (force) and the load. As the ratio of effort (force) arm length to load arm length increases the mechanical advantage of a first-class lever increases.
Archimedes referred to a first-class lever in his famous quote “Give me one firm spot on which to rest (a fulcrum) and I will move the Earth”
How to Calculate Diameter of fulcrum pin given compressive stress in pin?
Diameter of fulcrum pin given compressive stress in pin calculator uses Diameter of Lever Fulcrum Pin = Force at Lever Fulcrum Pin/(Compressive Stress in Fulcrum Pin*Length of Pin Boss) to calculate the Diameter of Lever Fulcrum Pin, Diameter of fulcrum pin given compressive stress in pin is the thickness of the lever arm measured parallel to the applied force on the respective arms. Diameter of Lever Fulcrum Pin is denoted by d1 symbol.
How to calculate Diameter of fulcrum pin given compressive stress in pin using this online calculator? To use this online calculator for Diameter of fulcrum pin given compressive stress in pin, enter Force at Lever Fulcrum Pin (Rf), Compressive Stress in Fulcrum Pin (σtfp) & Length of Pin Boss (l) and hit the calculate button. Here is how the Diameter of fulcrum pin given compressive stress in pin calculation can be explained with given input values -> 11550.57 = 3560/(25900000*0.0119).