Runouts need to be minimized. The most common causes of the center of rotation movement are shaft whip and bearing wobble. The issue is even worse when there’s misalignment. Contrary to widespread assumption and practice, misalignment cannot be corrected or made up for by using flexible couplings.
Spark is the life force that these plugs channel into the engine. When an ignition system sends an electrical current to the spark plug, it jumps the gap between the center and side electrodes, creating a spark that ignites the compressed fuel mixture in the combustion chamber. This spark is the catalyst that transforms potential energy into kinetic energy, propelling vehicles forward. The efficiency and reliability of this process are critical to engine performance and depend largely on the quality of the spark plug.Longer seal life can be expected with shafts having a Rockwell (RC) hardness of 30 or more. When exposed to abrasive contamination, the hardness should be increased to RC 60.