Replacement Mantle B for Sandvik CS440/S4000/S4800 (Part No. 442.8070-02)

The 442.8070-02 Mantle B is a critical wear component engineered specifically for the Sandvik CS440, S4000, and S4800 series cone crushers. Manufactured to exceed OEM specifications, this liner utilizes advanced metallurgy to deliver consistent crushing performance in high-abrasion environments. As a primary component in the crushing chamber, this Cone Crusher Liner ensures optimal geometry retention and throughput efficiency.

Technical Specifications

Core Engineering Advantages

Our crusher spares are developed focusing on the tribological interaction between the liner and the crushed material. Unlike generic castings, our process involves:

• Optimized Microstructure: We utilize a water-quenching heat treatment process to ensure a fully austenitic structure. This prevents carbide precipitation at grain boundaries, which is the primary cause of premature cracking in standard manganese liners.
• Work-Hardening Capability: The selected Mn18Cr2 alloy possesses a high work-hardening rate. While the liner remains ductile enough to absorb impact loads without shattering, the surface layer rapidly hardens up to 550 HB under compressive stress, significantly increasing wear resistance.
• Precision Fitment: All mating surfaces undergo CNC machining to ensure 100% contact with the head center. This eliminates gaps that can lead to stress risers and liner loosening during operation.

Performance Analysis: Premium vs. Standard

Field data collected from mining operations processing granite and basalt (WI > 18) demonstrates the performance differential of our wear parts:

Quality Assurance & Manufacturing

We operate as specialized crusher part suppliers where quality is quantified, not assumed. Every 442.8070-02 Mantle undergoes:

• Dimensional Inspection: Laser scanning to verify profile accuracy against OEM blueprints.
• Non-Destructive Testing (NDT): Ultrasonic testing (Level II) to detect internal porosity or shrinkage defects common in sand casting.
• Traceability: Each unit is stamped with a unique heat number tracking back to the specific furnace melt and heat treatment chart.

Field Diagnosis: When to Change Your Mantle

Proper maintenance of spare parts requires recognizing wear patterns before catastrophic failure occurs. Inspect the 442.8070-02 Mantle for the following:

1. The “Bell” Effect: If the bottom of the mantle becomes extremely thin while the top remains thick, it indicates feed segregation or operating at a low choke setting. This requires adjustment of the feed arrangement, not just a part replacement.

2. Peening or “Flowing”: Manganese steel flows under pressure. If you observe the metal expanding at the bottom edge (mushrooming), grind this lip off immediately. Failure to do so can cause the mantle to seize against the concave support ring, making removal extremely difficult.

Expert Implementation Advice

As a manufacturing engineer, I recommend the following when installing the 442.8070-02:

• Backing Compound: Always use a high-performance epoxy backing compound. This acts as a damper for impact vibration and fills voids between the mantle and head. Without it, the mantle may crack due to point loading.
• Burning Ring: Ensure the burning ring is correctly positioned. A misalignment here will prevent the locking nut from tightening down the mantle squarely.
• Run-in Period: Allow the new liner to work-harden. Operate at 50% feed for the first 30 minutes, then gradually increase to full choke. This establishes the initial hardened skin and prevents early plastic deformation.

Frequently Asked Questions

Q1: Can this Mantle B be used in a Sandvik S3800 crusher?
No. While the S-series shares design philosophies, the S3800 has different geometric dimensions. The 442.8070-02 is strictly for the CS440, S4000, and S4800 models to ensure proper fitment and crushing dynamics.

Q2: Why choose Mn18Cr2 over Mn13Cr2 for this application?
For modern cone crushers like the S4000 which operate at higher hydraulic pressures and speeds, Mn13 (standard manganese) often wears out before it fully work-hardens. Mn18Cr2 provides a better balance of toughness and wear resistance for hard rock applications.

Q3: Does this part come with the locking nut?
Typically, the Mantle (442.8070-02) is sold as a standalone casting. Locking nuts, torch rings, and backing compounds are separate consumable items, though we recommend replacing the torch ring with every mantle change.