Food grinding system Arrius® MRRA

grainwheatroller

Product overview
The Arrius MRRA is a fully integrated grinding system for milling applications. It grinds wheat, durum, rye, barley, corn and spelt. Drive unit and switch cabinet are integrated into the machine for plug-and-play delivery, reducing installation and commissioning time.

Key benefits

• Improved grinding efficiency: new asymmetrical feed module with screw ensures homogeneous mixing and even distribution across the full roller length.
• Energy savings up to 10%: integrated motor and gearbox with mechanical energy recovery reduce electrical consumption.
• Reduced building investment: integrated drive removes need for separate drive floor, lowering construction cost and simplifying layout.

Highlight features

• Grinding performance: pre-stressed, backlash-free roller pack for stable grinding and optimized energy transfer.
• Ease of use: modern control system with integrated web server for monitoring and operation from smartphones, tablets and PCs.
• Plug-and-play design: pre-wired, factory-tested switch cabinet delivered ready to operate to minimize on-site wiring and commissioning time.
• Food safety: hygienic design with stainless steel or food-grade product-contact surfaces; cleaning-under-machine capability and emptying function for residue-free discharge.
• Operational safety: electronically lockable cover, hand-guard protection and advanced sensors including roller temperature measurement for continuous monitoring.
• Customization: available as 4-roller or 8-roller units; roller lengths 1000, 1250 and 1500 mm; optional motor-driven gap adjuster, temperature monitoring and grinding force measurement.

Other features & maintenance

• Quick roller pack change: dedicated removal device enables full pack replacement in under one hour to reduce downtime.
• Remote app and connectivity: integrated web server and Bühler remote app allow mobile access over the mill network; IoT-ready control with configurable dashboards.
• Control & automation: web-based operating system for graphical interface, data integration and improved decision making.

Application possibilities

• Wheat
• Durum
• Rye
• Barley
• Corn
• Spelt
• Sorghum
• Oats
• Starch / biorefinery feedstocks

Technical specifications

• Product name: Arrius® MRRA
• Type: Fully integrated grinding system (drive unit and switch cabinet integrated)
• Suitable raw materials: wheat, durum, rye, barley, corn, spelt
• Versions: 4-roller and 8-roller configurations
• Roller lengths: 1000 mm, 1250 mm, 1500 mm
• Integrated drive: motor + gearbox with mechanical energy recovery; up to ~10% energy savings
• Feed module: asymmetrical inlet and screw for homogeneous mixing and even distribution
• Hygiene: stainless steel/food-grade surfaces, cleaning-under-machine capability, emptying function
• Safety: electronically lockable cover, hand-guard protection, roller temperature monitoring and other sensors
• Options: motor-driven grinding gap adjuster, roller/bearing temperature monitoring, grinding force measurement
• Maintenance: roller pack removable device enabling change in under one hour
• Control: integrated web server, remote app support and IoT connectivity