Cone Crusher Countershaft Bushing

The cone crusher countershaft bushing, a critical bearing component between the countershaft and its housing, functions in load support (bearing radial and axial loads), friction reduction (minimizing energy loss at 500–1500 rpm), alignment maintenance (ensuring concentricity), and contamination protection. It requires excellent wear resistance, low friction, and dimensional stability.​ Structurally, it is a cylindrical or flanged sleeve comprising a bushing body (bearing bronze like ZCuSn10Pb1, babbitt metal, or steel-backed bimetallic materials), inner bearing surface (Ra0.8–1.6 μm with oil grooves), outer surface (interference fit with housing), optional flange, lubrication features (oil grooves and holes), and optional thrust faces. Its wall thickness ranges from 5–20 mm.​ For bronze bushings, the manufacturing process includes material selection, casting (centrifugal for cylindrical ones, sand casting for complex shapes), heat treatment (annealing at 500–600°C), and machining (rough and finish machining, oil groove machining). Bimetallic bushings involve steel shell preparation, bearing layer application (sintering or roll bonding), and final machining.​ Quality control covers material testing (chemical composition and hardness), dimensional checks (CMM and roundness tester), microstructural analysis, performance testing (friction coefficient and wear), and fit checks. These ensure the bushing provides precision, wear resistance, and low friction for efficient power transmission in cone crushers