A harmonic balancer is an engine component

 Understanding The Functions of a Harmonic Balancer And an Underdrive Pulley

A harmonic balancer is an engine component attached into the crankshaft of the engine. Its purpose is to help in preventing or dampening vibration that may result into damage on other parts of the engine. Typically, it is mounted at the front of the engine and it is routed around with the serpentine belt along with the other pulleys in the system.


The pulley is constructed of robust, durable metal resistant to high temperatures common in the compartment of the engine. In some cases, it is shaped to help in keeping the belt in place.


What is the Main function of a Harmonic Balancer?


The main function of a harmonic balancer is to prevent any damage to the crankshaft of the engine. The moment the engine cylinders fire during combustion, they enable the torque to be imparted onto the crankshaft. Then the crankshaft tries to resist the torque that leads to vibration.


This process is not actually damaging the crankshaft but at certain speeds of the engine, the force being caused by the combustion in the cylinders as well as the warding off of the force in the crankshaft may result to excessive forces that the crankshaft may not be able to handle and causing it to fail.


In order for failure of the crankshaft to be prevented, a harmonic balancer will have to be fastened to the crankshaft. It helps balance the forces that are placed on the crankshaft during combustion hence preventing such force from resulting to failure on the crankshaft. The balance features a rubber ring designed for added damping. It can even act as guide for the drive belt to ensure that it stays in place and tensioned on its normal functioning.

What is an Underdrive Pulley and How Does It Work?


Auto mechanics are using an Underdrive pulley as replacement pulleys containing different specifications on ratio and material which free up the lost horsepower. Using this kind of pulley helps increase the diameter of every accessory pulley and reduces the crank pulley ratio. The speed at which the accessories are turning is relevant to the RPM of the engine decrease.


Instead of adding horsepower to the engine, the Underdrive pulley helps in freeing up the power that is wasted generally on overdriven accessories. Larger pulleys help in driving the accessories slower and decrease their loss of horsepower. Having a reduction in wearing the accessories out can actually help in extending the life of these components.

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