Vertical Shaft Impactors have the unique feature of adjustable operating speed. These machines perform by applying velocity to the incoming mineral. Typically, crushing velocities below 250 fps (75 mps) are crushing speeds that can be applied to feed sizes from 4" (100 mm) to approximately 1/2" (13 mm). When the feed size is smaller than this, it has a low mass value and in order to reduce it, greater than normal velocity must be applied. When the speed exceeds 250 fps (75 mps) the result is high inter-particle compression and forceful attrition which achieves a milling effect. REMco VSG units operate well above crushing speeds and can mill with velocities up to 360 fps (110 mps).

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