Do you need an impact crusher to turn excess materials into a profitable product? Thompson Tractor can help. We have a veteran team of professionals to make sure you have the right product with the exact configuration you need to produce the desired result.
Impact crushers involve the use of impact rather than pressure to crush material. The material is fed into a cavity with openings on the bottom, end, or side to allow crushed material to exit the crusher. Our horizontal single shaft machines break material by impacting it with hammers (blow bars) that are fixed on the outer edge of a spinning rotor. The rotor has two (2) active “blow” bars and two (2) dummy bars. The active bars throw the material into the stationary “anvils” to create the impact crushing process and dummy bars are primarily for rotor balance. When wear occurs on the active bars and they can be rotated in the field to prolong bar life.
Impact Crushers have a Reduction Ratio of approximately 15:1. An example of this ratio of reduction would be that a 30” input particle can be reduced to approximately a 2” discharge particle. Impact crushers tend to produce more “fines” that other types of crushers and are best suited to produce a “dense graded” type product or to provide feed material to a screening unit where the amount of fine product is important. Wear rates for an Impactor are increased when the feed material increase in abrasiveness.
Normal Closed Side Setting – CSS (distance between the active bar and the lower anvil) normally run in the 1” range and can go up to 3”. The CSS is adjustable in the field. A top size material specification cannot be guaranteed from an impactor. Normally 60% to 70% of the discharge material will be smaller than the CSS. If a guaranteed top size is required for a specific application, the crusher can be paired with a Spyder screening unit or a “recirculating” impactor can be used.