Description
What is an Lower Head Bushing?
An Lower Head Bushing set forms the critical bronze bearing interface between a cone crusher’s moving head assembly and the stationary main shaft. Its primary function is to support the immense weight of the head while providing a flawless, low-friction rotational guide. By absorbing extreme multi-directional crushing shock and maintaining strict alignment, premium Upper & Lower Head Bushing components prevent destructive metal-to-metal contact, ensuring consistent closed-side setting (CSS) performance and protecting the structural chassis during high-tonnage aggregate reduction.
Equipment Compatibility & OEM Cross-Reference
Our aftermarket replacement Upper & Lower Head Bushing components are precision-engineered to be direct-fit upgrades for Metso crushers, significantly lowering your Total Cost of Ownership (TCO) while ensuring zero compatibility issues and maximum field uptime.
| Supported Brands | Applicable Crusher Series | Common OEM Part Numbers |
| Raíces | Nordberg HP Series: HP100, HP200, HP300, HP400, HP500, HP800, HP4, HP6 | 1022145730, 1022145975, 1022147350, N15655252, 1022147723 (Matches standard OEM specifications) |
Core Engineering & Technical Advantages
Because the head assembly operates under continuous heavy-load compression and rotational friction, standard bearings can suffer from rapid thermal expansion or galling. Our premium Upper & Lower Head Bushing replacements are proudly manufactured in China to deliver unmatched heavy-duty durability:
High-Strength Bronze Alloy: Cast from premium, specialized bronze alloys that deliver exceptional self-lubricating properties, providing a crucial safety margin against seizure during temporary oil starvation.
Centrifugal Casting Technology: Manufactured using advanced centrifugal casting to ensure a highly dense, uniform micro-structure, completely eliminating internal porosity and maximizing heavy-duty load-bearing capacity.
Precision CNC Machining: Machined to exact OEM dimensional tolerances for a perfect, drop-in fit, guaranteeing flawless shaft alignment and simplifying on-site maintenance.
Optimized Heat Dissipation: Engineered to minimize friction-induced heat generation, actively protecting the vital lubricating oil film during continuous, choke-feeding operations.
Maintenance Guidelines: When to Replace Your Upper & Lower Head Bushing
Operating a crusher with compromised bronze bearings will misalign the head assembly, leading to poor aggregate shape and severe scoring on the expensive main shaft. We recommend inspecting the Upper & Lower Head Bushing during every routine mantle change:
| Inspection Focus | Warning Signs (Replace Immediately) | Best Practice Solution |
| Surface Wear & Scoring | Deep scratches, flaking, or heavy scoring marks on the inner bronze bearing surfaces. | Replace the Upper & Lower Head Bushing immediately to prevent abrasive friction from destroying the main shaft. |
| Clearance Tolerances | Excessive physical play or out-of-round deformation detected between the bushings and the shaft. | Swap the bushings to restore proper gyration alignment and ensure consistent crusher volumetric throughput. |
| Heat & Lubrication Damage | Discoloration or melted bronze smearing, indicating severe oil starvation or localized overheating. | Inspect the lubrication system for blockages and replace the ruined bushings to avoid complete head assembly lock-up. |
Explore More Crusher Main Frame Components
To maintain peak crushing volumetric throughput (TPH), ensure your maintenance inventory is stocked with fully compatible, premium parts. Browse our specific component categories:
Find precision-machined Crusher Heads and Main Shafts for complete HP series rebuilds.
Explore our robust aftermarket spares for Sandvik CH & CS Series Crushers.
View high-performance replacement Eccentric Assemblies and Socket Liners for Metso HP Series Cone Crushers.
