Horizontal Shaft Impact Crusher Gradations. Gradation Control Based on Rotor Tip Speed. Andreas - 4230, 4233, 4240, 4250, 5260-3, 5260-4. Andreas - 4230, 4233, 4240, 4250, 5260-3, 5260-4. Andreas - 4230, 4233, 4240, 4250, 5260-3, 5260-4. Andreas - 4230, 4233, 4240, 4250, 5260-3, 5260-4. Andreas - 4230, 4233, 4240, 4250, 5260-3, 5260-4.Web