Jaw Crushers and Hammer Mills for Ore Mining - MBMMLLCOverview. The jaw crusher has been a staple of the hardrock mining industry since its invention. It is used as a primary crusher for all types of ores. The jaw typically takes the larger run of mine product and produces a sized discharge for feed to a secondary crusher such as a cone crusher, ball mill, or hammer mill. We have.harmony gold crusher mills and feeders,Mt. Baker Mining and Metals Jaw Crushers | Hammer Mills | Shaker .Mt. Baker Mining and Metals manufactures and sells durable rock and metal reduction and classification equipment; turn-key systems and individual machines.