Rotor mill SM 50

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Overview
The SM 50 is a benchtop cutting mill designed for laboratory and small-scale industrial size reduction. It features a removable push-fit milling chamber and Total Access Concept for fast cleaning, a 1.5 kW drive with variable speed, an integrated cyclone for high sample recovery and tool-free component removal to minimize contamination and downtime.

Key Benefits

• Removable push-fit milling chamber enables complete external cleaning and reduces cross-contamination risks.
• EasyInspect hopper accepts large pieces up to 50 mm and batch-wise feeding up to ~200 ml for controlled throughput.
• Integrated push-fit cyclone provides efficient transfer to the collector with minimal residue and no external hoses.
• Powerful 1.5 kW motor with variable speed (500–4,000 min-1) for a wide application range.
• Large rotor (129.5 mm) and high peripheral speed (up to 27.1 m/s) for effective cutting and throughput.
• Push-fit rotor, sieves and cyclone components removed without tools for rapid turnaround.

Cleaning / Operation Modes

• Surface cleaning: open access door for brushing, vacuuming or compressed air.
• Intense cleaning: remove rotor, sieves, cyclone and milling chamber (push-fit) for complete external cleaning.
• Parallel cleaning: use a second grinding set to process samples while cleaning the other set to avoid cross-contamination.

Sample Recovery & Flow Control
Optimized internal geometry and integrated cyclone support up to 100% sample recovery (dependent on material and configuration). The batch-wise hopper feeding acts as a flow-control gate, improving grinding performance and cyclone separation.

Applications & Materials
Suitable for size reduction by cutting across sectors: agriculture, chemicals/plastics, construction materials, electronics, recycling/environmental, food/feed, pharma/biotech/medtech and energy. Handles soft, medium-hard, tough, elastic and fibrous materials (e.g. feed, plastics, roots, feathers, electronic parts, dense monoliths).

Accessories & Options

• Milling chambers: stainless steel, abrasion-resistant steel, heavy-metal free material (push-fit).
• Integrated cyclone with GL55 thread for 250 / 500 ml glass bottles or 3 l receptacle via adapter.
• Gravity chamber option for coarse pre-grinding (no cyclone).
• Rotors: parallel-section rotor and 3-disc rotor with reversible hard-metal plates.
• Sieves: trapezoid holes 0.25 / 0.50 / 0.75 / 1.00 mm; square holes 2 / 4 / 6 / 8 / 10 mm.
• Collectors: glass collectors 0.25 l / 0.5 l (not for gravity chamber) and 3 l receptacle.

Functional Principle
Samples are batch-fed through the EasyInspect hopper and driven into the milling chamber by a plunger. Cutting occurs between rotating blades and stationary double-acting cutting bars; rotor designs (3-disc or parallel-section) combine cutting and shearing. Cyclone transfer minimizes dust release and conveys milled material to the collector.

Technical Data

• Applications: size reduction by cutting
• Field of application: agriculture, chemicals/plastics, construction materials, electronics, recycling/environmental, food/feed, pharma/biotech/medtech, energy
• Feed material: soft, medium-hard, tough, elastic, fibrous
• Size reduction principle: shearing, cutting
• Max feed size*: 50 mm
• Final fineness*: 0.25 – 10 mm (depending on sieve)
• Speed (50 Hz / 60 Hz): 500 – 4,000 min-1
• Rotor peripheral speed: 4.3 – 27.1 m/s
• Rotor diameter: 129.5 mm
• Drive power: 1.5 kW (3-phase asynchronous motor with frequency converter; single-phase plug option available)
• Protection class: IP 20
• Dimensions (W x H x D): 565 x 750 x 530 mm (with base frame and hopper)
• Net weight: 80 kg
• Standards: CE
• *depending on feed material and configuration

Technical Specifications

• Model: SM 50
• Drive power: 1.5 kW
• Speed range: 500 – 4,000 min-1
• Rotor diameter: 129.5 mm
• Rotor peripheral speed: 4.3 – 27.1 m/s
• Max feed size: 50 mm
• Final fineness: 0.25 – 10 mm (by sieve)
• Collector options: 0.25 l / 0.5 l glass, 3 l receptacle
• Integrated cyclone with GL55 thread
• Weight: 80 kg