The Grinder is a machine added by Factorization, mainly used to turn ores into ore gravel in order to increase the yield of metals.
Despite being extremely slow, the Grinder provides the highest yield for Iron Ore, Tin Ore, Copper Ore, Silver Ore, Gold Ore, Coal Ore and Diamond Ore when followed up with the Mixer, Slag Furnace, Crystallizer and smelting in this order. Coal Ore and Diamond Ore can be obtained using the Silk Touch enchantment on a pickaxe, or more easily by processing Nether Coal Ore and Nether Diamond Ore in an Induction Smelter.
The Motor and the Diamond Cutting Head can be switched.
Changing Common Blocks
Gravel -> Sand
Mycelium -> Dirt
Stone -> Cobblestone
Percentages refer to the yield after grinding.
Refer to Dirty Gravel for more information.
If smelted at this stage, all dirty gravel has a yield of 100% in a normal furnace and 142% in a Slag Furnace. The Grinder is the only machine that can produce dirty gravel.