This page is about the Crusher added by GregTech 6. For other uses, see Crusher. The Crusher is a processing machine added by GregTech 6. It is mainly used to crush ores and double their output, but it can also crush Stone to Gravel and many blocks into smaller items. The Crusher is powered by kinetic energy or KU provided by an engine. The essential use of the Crusher is as the first part of.As the term primary implies, primary crushers are used in the first stage of any size reduction cycle. Generally gyratory crushers, jaw crushers, high speed double roll crushers, low speed sizers, impactors and hammer mills are used as primary crushers. In the secondary and subsequent stages, the material is further reduced and refined for.