How to Build a Rock Crusher | Hunker Making your own rock crusher invariably requires you or someone you know to possess some basic welding skills. Iron is the ore of choice when it comes to breaking rocks into hand-sized pieces and a skilled or even semi-skilled welder are the only people who can shape iron. Impact Crushers | Crush Rock, Minerals & More | Williams ... For example, in the building and construction industry, an impact crusher is used to create smaller rock particles such as sand and gravel. The type of impact crusher you need also depends on whether you're conducting a primary or secondary crushing application (or even tertiary/fine), as different impact crushing machine types are more ideal ... Crusher - Wikipedia A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated. Amazon: rock crusher: Toys & Games Kinetic Rock Crusher Real Rock That Magically Sticks Together Dig, Build, and Crush With The Included Rock Crusher For Ages 3+ $21.14 $ 21 14 + $5.49 shipping. Only 7 left in stock - order soon. Show only Spin Master items. 4.2 out of 5 stars 3. See Size Options.    Read More