Makina opukutira lamba a GRINDMASTER crankshaft amagwiritsidwa ntchito kupukuta khosi losindikizira mafuta, magazini yayikulu, ndi kulumikiza khosi la ndodo ya crankshaft. Mukapukuta, chogwiritsira ntchito chimapopera ndi kutsukidwa, ndiyeno zigawozo zimapukutidwa ndi lamba wa abrasive.
Pali njira ziwiri zozungulira panthawi yopukutira, ndipo njira yomaliza yopukutira ndi yofanana ndi njira yanthawi zonse ya injini (yowonedwa kuchokera ku mbali ya flywheel); pambuyo kupukuta, kupota-kuyanika-kuyanika ndi degreasing ntchito ikuchitika, ndipo zipangizo zimafunika yake kupukuta madzi mankhwala dongosolo.