Matsayin crankshaft counterweight (wanda kuma aka sani da counterweight) shine daidaita ƙarfin centrifugal mai jujjuya da lokacinsa, kuma wani lokacin madaidaicin ƙarfin inertial da lokacinsa. Lokacin da waɗannan dakarun da lokutan kansu suka daidaita, ana iya amfani da ma'aunin ma'auni don rage nauyin da ke kan babban nauyin. Ya kamata a yi la'akari da lambar, girman da kuma sanya nauyin ma'auni bisa ga adadin silinda na injin, tsari na cylinders da siffar crankshaft. Ma'aunin ma'auni gabaɗaya ana jefawa ko ƙirƙira shi zuwa ɗaya tare da crankshaft, kuma babban ma'aunin ma'aunin ingin dizal ɗin ana kera shi daban daga crankshaft sannan a kulle tare.