Retaining Bar for Metso Barmac RC840 VSI

Product Overview

The Retaining Bar for the Metso Barmac RC840 VSI crusher is a vital structural component that secures critical wear parts—including wear plates and rotor tips—in place during high-velocity rock crushing. In Barmac VSI crushers, material is accelerated to speeds exceeding 80 m/s by a rotating rotor, creating intense centrifugal forces and impact loads that can dislodge unfastened components. This retaining bar is engineered to withstand these extreme forces, ensuring wear parts remain properly positioned, reducing downtime, and maintaining consistent product quality in mining, aggregate, and recycling applications.

Product Specifications

Material: Constructed from tungsten carbide-reinforced steel (with 10-15% carbide content) or high-strength alloy steel (4140 grade), offering a hardness of up to 60 HRC for exceptional impact resistance.

Dimensions: Custom-designed for the RC840’s rotor assembly, with lengths ranging from 300-500 mm and cross-sectional dimensions (typically 25x25 mm to 40x40 mm) optimized for strength and weight.

Weight: Each bar weighs 5-10 kg (11-22 lb), with weight-matched sets ensuring balanced rotor operation and minimizing vibration during high-speed rotation.

Compatibility: Direct replacement for original Metso Barmac RC840 components, featuring precision-machined mounting interfaces that align with the rotor’s wear plate recesses.

Features

Impact Resistance:

Tungsten carbide inserts brazed into high-wear zones provide 30-50% longer service life compared to standard steel bars, withstanding repeated impacts from high-velocity material.

Interlocking tongue-and-groove design prevents lateral movement under centrifugal forces (up to 5,000 Gs at rotor tips), ensuring secure retention of wear plates even during unbalanced loading.

Easy Maintenance:

Tool-less boltless installation system with spring-loaded locking pins allows replacement through the crusher’s service doors in under 15 minutes, minimizing production interruptions.

Color-coded weight-matched sets simplify inventory management and ensure rotor balance, reducing the risk of bearing damage from vibration.

Optimized Performance:

Contoured profile with aerodynamic design guides material flow into the crushing chamber, reducing turbulence and enhancing the crusher’s ability to produce cubical product shapes with minimal fines.

High-temperature resistance up to 300°C ensures dimensional stability when processing hot materials, such as recycled asphalt or freshly crushed volcanic rock.

Applications

Aggregate Production: Secures wear parts in crushers producing concrete aggregates (3/8-inch to 1.5-inch sizes) and asphalt chips, maintaining consistent particle shape and gradation.

Mining: Handles abrasive ores including gold, iron ore, and copper, where high silica content and hard rock formations accelerate wear on unprotected components.

Recycling: Processes construction debris, including reinforced concrete and brick, where embedded steel and varying material hardness create challenging wear conditions.

Quarrying: Ensures reliable performance in limestone, granite, and basalt crushing, where material compressive strengths range from 80 to 300 MPa.