What is the expected wear life of this moving cone liner in granite crushing?

In granite crushing with a feed size of 2.5 inches and a closed side setting of 0.5 inches, this Mn18Cr2 liner typically lasts 800-1,000 hours before reaching the wear limit. The actual life depends on throughput, moisture content, and feed gradation. For optimal results, monitor the wear profile every 200 hours and rotate the liner if uneven wear is detected. Using a proper feed distribution system, such as a feed cone or belt feeder, can extend life by up to 20% by ensuring uniform wear across the chamber.

How do I install this liner on a 1,200 mm head cone crusher?

Installation requires a clean cone head surface and a torque wrench. First, clean the cone head and inspect for any burrs or damage. Apply a thin layer of anti-seize compound to the mating surfaces. Position the liner using lifting eyes and lower it evenly onto the cone head. Secure it with the retaining bolts and torque to the manufacturer's specification, typically 1,200 Nm for M24 bolts. After 8 hours of operation, re-torque the bolts to compensate for settling. Always follow the crusher OEM's manual for specific torque values and safety procedures.

Can this liner be used in a tertiary crushing stage for manufactured sand production?

Yes, this liner is suitable for tertiary crushing in manufactured sand production, provided the feed size does not exceed 2.5 inches and the crusher is operated at the recommended 220 rpm. For sand production, a tighter closed side setting (e.g., 0.25-0.375 inches) is often used, which increases the wear rate. In such cases, expect a wear life of 600-800 hours. To maximize efficiency, pair this liner with a compatible concave and maintain a choke-fed condition to ensure inter-particle crushing, which improves product shape and reduces wear on the liner itself.

Moving Cone Liner

Mn18Cr2 Moving Cone Liner for 2.5-Inch Feed Cone Crushers

The moving cone liner is a critical wear component in cone crushers, directly influencing crushing efficiency and product size. This Mn18Cr2 (Hadfield manganese steel) liner is engineered for 2.5-inch (63.5 mm) feed openings and 220 rpm cone speeds, delivering reliable performance in secondary and tertiary crushing stages. It suits aggregate producers, mining operations, and recycling facilities processing abrasive materials like granite, basalt, and slag.

Material Grade

Mn18Cr2 (Hadfield manganese steel)

Feed Opening

2.5 inches (63.5 mm)

Cone Speed

220 rpm

Liner Weight

1,250 kg

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How to Maximize Crushing Efficiency with the Right Moving Cone Liner

The moving cone liner is the inner wear part mounted on the main shaft of a cone crusher, working in conjunction with the concave (bowl liner) to crush material through compression and attrition. This specific liner is cast from Mn18Cr2 Hadfield manganese steel, a material renowned for its work-hardening behavior under high impact. With a feed opening of 2.5 inches (63.5 mm) and a recommended cone speed of 220 rpm, it is optimized for secondary and tertiary crushing circuits where precise product shape and high reduction ratios are required. The liner weighs approximately 1,250 kg and is designed for crushers with a 1,200 mm head diameter, ensuring compatibility with popular models in the 200-300 t/h capacity range.

Typical applications include aggregate production for concrete and asphalt, mining operations processing copper and gold ores, and construction waste recycling. The 2.5-inch feed opening makes it ideal for handling material that has already been reduced by a primary jaw crusher, producing a final product with a high percentage of cubical particles. In abrasive environments such as granite or basalt crushing, the Mn18Cr2 alloy provides superior wear resistance compared to standard Mn13, reducing liner change-out frequency and associated downtime. The liner's profile is engineered to maintain a constant crushing chamber geometry throughout its wear life, which stabilizes power draw and prevents fluctuations in product gradation.

Compared to other liners in the series, this 2.5-inch feed opening model is positioned for medium-duty to heavy-duty applications where a balance between throughput and wear life is critical. It offers a 15% longer wear life than the standard Mn13 liner under identical operating conditions, and its precision casting tolerances (±2 mm) eliminate the need for on-site grinding or shimming during installation. For operations seeking to reduce cost-per-ton, this liner delivers a measurable return by minimizing unscheduled maintenance and improving overall plant availability.

Work-hardening Mn18Cr2 steel achieves surface hardness >HB 500 under impact, extending wear life by 30% over Mn13.
Precision casting to ±2 mm tolerance ensures drop-in fit, cutting installation time by up to 4 hours per change-out.
Optimized chamber profile maintains consistent throughput, reducing recirculating load by 15% and lowering energy consumption per ton.

Core Technical Features and Quantified Advantages

STEP 1

Mn18Cr2 Work-Hardening Steel

The Mn18Cr2 alloy (18% manganese, 2% chromium) work-hardens from HB 220 to over HB 500 under repeated impact, providing exceptional wear resistance in abrasive crushing applications. This extends the liner's service life by 30% compared to standard Mn13 liners, reducing replacement frequency and downtime costs.

STEP 2

Precision Casting ±2 mm Tolerance

Each liner is cast to a dimensional tolerance of ±2 mm, ensuring a precise fit on the cone head without the need for on-site grinding or shimming. This reduces installation time by up to 4 hours per change-out and eliminates the risk of improper seating that can lead to premature failure.

STEP 3

Optimized Chamber Profile for 2.5-Inch Feed

The liner's profile is engineered specifically for a 2.5-inch (63.5 mm) feed opening and 220 rpm cone speed, maintaining a consistent crushing chamber geometry throughout its wear life. This stabilizes power draw and reduces recirculating loads by 15%, improving overall plant throughput and energy efficiency.

STEP 4

1,250 kg Weight for 1,200 mm Head Crushers

At 1,250 kg, this liner is designed for cone crushers with a 1,200 mm head diameter, typical of 200-300 t/h capacity machines. The weight is optimized for safe handling with standard lifting equipment and ensures proper inertia for effective crushing without overloading the crusher's eccentric assembly.