Aufgabekegel | Kegelbrecher-Teile | ATF

Feed Cones: Material Distribution and Head Protection

The feed cone sits at the top of the mantle assembly in cone crushers, serving two critical functions that directly affect machine performance and component longevity. First, it distributes incoming feed material evenly around the full 360-degree circumference of the crushing chamber, ensuring uniform loading on the mantle and concave surfaces. Proper feed distribution prevents localized overloading that causes premature liner wear, uneven product gradation, and elevated power consumption. Second, the feed cone protects the head nut and main shaft threads from direct impact and abrasive wear from falling feed material, which can drop from heights of 1-3 meters above the crusher inlet. Feed cones are cast from manganese steel conforming to ASTM A128 in grades ranging from Mn13Cr2 to Mn18Cr2, with the cone profile angle engineered to deflect material radially outward into the crushing chamber rather than allowing it to accumulate on top of the mantle.

Feed cones are sacrificial components designed to absorb impact and abrasive wear from falling feed material while protecting the more expensive head nut and main shaft assembly beneath. They are manufactured as precision castings with controlled wall thickness (typically 25-60 mm depending on crusher model) to provide adequate wear life while maintaining the correct distribution profile geometry. As the feed cone wears, its ability to distribute material evenly degrades, causing channeling where material flows preferentially to one side of the chamber. This channeling effect creates asymmetric mantle wear, reduces crushing efficiency, and can generate destabilizing forces on the main shaft. A severely worn or damaged feed cone that has worn through to the head nut exposes the main shaft threads to direct abrasion and impact, potentially requiring costly main shaft repair or replacement. ATF recommends inspecting feed cone condition at every scheduled maintenance stop and replacing when wear exceeds 60-70% of the original wall thickness or when the distribution profile is visibly distorted.