Horizontal Grinders | Tub Grinders | Primary Machinery
888-680-3433. Welcome to Primary Machinery! We sell tub grinders, horizontal grinders, wood chippers, slow speed high torque shredders, rock crushers and more! We buy sell or trade quality, pre-owned, heavy equipment. From Domestic to International sales we can help!Buyer's Guide: Crushers - Equipment & Contracting,Crusher Classification. As discussed in our article “Get to Know the Common Types of Mining Equipment” there are three classifications of crushers: primary, secondary, and tertiary. Crushers are further categorized by how they crush the material.Mobile Primary Jaw Crusher,Raymond Mill,Magnetic Separator,,L&M Heavy Industry is a manufacturers of jaw Crusher, cone Crusher, sand making machine, vsi impact crusher, mobile crusher plant and vertical mill, ultra-fine grinding, tricyclic medium-speed micro-grinding, coarse powder, pulverized coal mill, Raymond Mill, hanging roller mill.