Limestones is a main material for making of cement vvhich process of production had noticed, especially limestones reduction process in Limestone Cruhset Unit at PT. Semen Baturaja (Persero), Tbk to increase quantity of crushed limestone production. Reduction process uses Hammer Crusher which has an installed capacity of 650 ton/hour and reduction product has a maximum size of 120 mm (also call…