Digital grinding machine Arrius® MRRA

stationarylarge-sizehigh-precision

Overview
The Arrius® MRRA is the first fully integrated grinding system for grain milling. It processes wheat, durum, rye, barley, corn and spelt and sets the benchmark for grinding performance and energy efficiency. The drive unit and switch cabinet are integrated into the Arrius® for plug-and-play delivery.

Key benefits

• Improve grinding efficiency: new feed module with asymmetrical inlet and screw mixes product homogeneously and distributes it evenly over the roller length.
• Save up to 10% energy: integrated drive (motor and gearbox) consumes up to 10% less energy; mechanical energy recovery via a specially developed gear.
• Reduce building investment: integrated drive reduces required floor space and building investment (can save an entire floor).

Highlight features

• Grinding performance — Unparalleled grinding stability: pre-stressed, backlash-free roller pack ensures a stable grinding process and optimizes energy transfer into the product; combined with the optimized feed module for outstanding output quality.
• Ease of use — Best-in-class usability: new control system with integrated web server allows monitoring and operation from smartphones, tablets and PCs; adaptable and simple to operate.
• Plug-and-play design — Fast installation: integrated switch cabinet is wired and tested at the factory and delivered ready to operate, reducing installation and commissioning time.
• Food safety — Hygienic design: product-contact surfaces are stainless steel or food-grade materials; machine allows cleaning underneath; emptying function enables residue-free discharge of the feed module.
• Operational safety — New safety standard: electronically lockable cover, hand guard protection and advanced sensors (including roller temperature measurement) continuously monitor machine status to support high uptime.
• Customize your machine: available as four-roller and eight-roller versions; roller lengths 1000 mm, 1250 mm and 1500 mm; optional motor-driven grinding gap adjuster, roller and bearing temperature monitoring, grinding force measurement.

Other features

• Maintenance: roller removing device enables change of the entire roller pack in under one hour, reducing downtime and improving productivity.
• Remote app: Bühler remote app connects to the Arrius® control system via the mill's internal wireless network. Initial setup arranges machines according to plant layout; the app displays the control user interface and provides full Arrius® control functionality on mobile devices.

Applications
Designed for milling and grain processing applications including wheat, durum wheat, corn, oats, sorghum and starch production where semolina or flour is produced.

Technical specifications

• Model family: Arrius® MRRA (integrated grinding system)
• Suitable raw materials: wheat, durum, rye, barley, corn, spelt
• Versions: four-roller and eight-roller
• Roller lengths available: 1000 mm, 1250 mm, 1500 mm
• Roller pack: pre-stressed, backlash-free; removable via roller removing device (< 1 hour change)
• Feed module: asymmetrical inlet and screw for homogeneous mixing and even product distribution
• Drive: integrated motor and gearbox with mechanical energy recovery (up to 10% energy saving)
• Control: integrated web server; monitor and operate from phone, tablet or PC
• Remote access: Bühler remote app for mobile device access on mill internal wireless network
• Hygiene: product-contact surfaces stainless steel or food-grade materials; allows cleaning under machine; emptying function for residue-free discharge
• Safety: electronically lockable cover, hand guard protection, sensors including roller temperature monitoring
• Options: motor-driven grinding gap adjuster; roller and bearing temperature monitoring; grinding force measurement