Description
What is a Cone Crusher Main Shaft?
A cone crusher Eixo Principal is the massive, forged steel central axis of the entire main frame assembly. Its primary critical function is to structurally support the crushing head and the sacrificial manganese mantle. Serving as the mechanical backbone of the crusher, a premium Eixo Principal withstands immense torsional stress, constant heavy-duty vibrations, and multi-directional kinetic impact forces during continuous, high-tonnage aggregate reduction circuits.
Equipment Compatibility & OEM Cross-Reference
Our aftermarket replacement Eixo Principal 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 |
| Raízes | Nordberg HP Series: HP100, HP200, HP300, HP400, HP500, HP800, HP4, HP6 | 7013308500, 7013308001, 7013308252, 1068863509, 1068867278, 1068869835 (Matches standard OEM specifications) |
Core Engineering & Technical Advantages
Because it acts as the primary structural anchor within the crushing chamber, a weak shaft will quickly suffer from metal fatigue or catastrophic snapping. Our premium Eixo Principal replacements are proudly manufactured in China to deliver unmatched heavy-duty durability:
High-Grade Forged Alloy Steel: Forged from premium structural alloy steel rather than cast, providing a dense, non-porous internal micro-structure that resists catastrophic cracking under extreme loads.
Precision CNC Machining: The crucial upper taper and lower bearing journals are machined to exact OEM tolerances, ensuring a flawless, vibration-free fit with the crushing head and eccentric assembly.
Advanced Heat Treatment: Undergoes rigorous quenching and tempering thermal processes to optimize core tensile strength while maintaining the necessary surface hardness to resist abrasive wear.
Ultrasonic Defect Testing: Every completed shaft undergoes strict 100% Non-Destructive Testing (NDT) to verify absolute internal structural integrity before it leaves our facility.
Maintenance Guidelines: When to Replace Your Main Shaft
Operating a crusher with a compromised or warped central axis will rapidly destroy your eccentric assembly and upper head bushings. We recommend rigorously inspecting the Eixo Principal during every major teardown:
| Inspection Focus | Warning Signs (Replace Immediately) | Best Practice Solution |
| Bearing Journal Wear | Deep scoring, galling, or a measurable reduction in diameter on the lower bearing journal surfaces. | Replace the Eixo Principal to restore proper eccentric clearances and prevent severe shaft wobbling. |
| Taper Deformation | Uneven wear, fretting, or severe damage on the upper tapered section where the head seats. | Swap the shaft. A damaged taper will prevent the crushing head from seating correctly, leading to sudden detachment. |
| Structural Metal Fatigue | Hairline cracks detected during Magnetic Particle Inspection (MPI) or ultrasonic testing. | Pull the damaged shaft immediately. Never attempt to weld or patch a load-bearing Eixo Principal, as it will inevitably snap during operation. |
Explore More Crusher Main Frame Components
To maintain peak crushing volumetric throughput (TPH) and stable structural operation, ensure your maintenance inventory is stocked with fully compatible, premium parts. Browse our specific component categories:
Find precision-machined Crusher Heads and Eccentric Assemblies for complete HP series rebuilds.
Explore our robust aftermarket spares for Sandvik CH & CS Series Crushers.
View high-performance replacement Inner Head Nuts and Bronze Bushings for Metso HP Series Cone Crushers.
