Impact mill SR 300

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Overview
The SR 300 rotor beater mill performs coarse and fine size reduction for dry, soft to medium‑hard, organic and inorganic materials. Optional cyclone separation is available for improved discharge and gentle processing of heat‑sensitive samples.

Product Advantages

• Wide range of accessories: feeding systems, multiple rotor types and sieves
• Defined final fineness via bottom sieves (apertures 0.08–10 mm)
• Optional 180° grinding inserts for additional impact on hard‑brittle materials
• Gravity outlet with 5 L standard or 30 L collecting vessel for batch collection
• Optional cyclone unit with collecting vessel sizes 0.25, 0.5, 1, 2, 5 or 30 L
• Optional distance rotor to reduce frictional heat
• Adjustable speed in steps (3,000–10,000 min-1)
• Removable hopper for easy loading and cleaning
• Easy maintenance with exchangeable push-fit grinding insert, rotor and cassette
• Central quick‑acting locking device for fast access
• Grinding chamber, feed hopper and in/outlets made of stainless steel
• Electric motor brake for safe stopping

Application Examples
Bentonite, chemicals, coal, coke, pharmaceuticals, feed pellets, fertilizers, food, graphite, gypsum, herbs, plant materials, plastics, powder coatings, resins, rice, salts, seeds, soils, spices, sugar, etc.

Functional Principle
Size reduction and deagglomeration are achieved by impact and shear. Material fed from the hopper enters the grinding chamber and is comminuted between rotor, sieve and grinding inserts. Particles smaller than the sieve aperture pass through the gravity outlet into the collector. A downstream filter separates airborne fines. The optional cyclone cools the sample and tools and improves discharge from the chamber. Safety features include a quick‑acting door lock, safety switch and inlet/outlet barriers.

Technical Data
Applications: size reduction, deagglomeration
Fields: agriculture, chemical/plastics, construction materials, environment/recycling, food, geology/metallurgy, pharmaceuticals
Feed material: dry, soft to medium‑hard
Max feed size*: < 25 mm
Final fineness*: < 50 µm
Speed (50 Hz / 60 Hz): 3,000–10,000 min-1 (steps of 500 min-1)
Rotor peripheral speed: 22–72 m/s
Rotor types: standard / distance
Grinding tool material: stainless steel
Sieve options: trapezoid holes 0.08 / 0.12 / 0.20 / 0.25 / 0.35 / 0.50 / 0.75 / 1.00 / 1.25 / 1.50 / 2.00 mm; round holes 3.00 / 4.00 / 10.00 mm
Hopper: removable
Dust extraction: optional cyclone
Collector capacity: standard 5 L; optional 30 L; cyclone variants 0.25–30 L
Drive: 3‑phase motor
Electrical supply: 200–240 V, 50/60 Hz
Power connection: single phase
Engine brake: electric
Protection class: IP 41
Power consumption: 2.5 kW
Dimensions W×H×D (closed): 600 × 1200 × 700 mm (with base frame)
Net weight: approx. 60 kg (with base frame)
Standards: CE
*depending on feed material and configuration

Technical specifications

• Model: SR 300
• Function: size reduction and deagglomeration
• Feed range: dry, soft to medium‑hard; organic & inorganic
• Max feed size: < 25 mm
• Final fineness: < 50 µm (dependent on sieve)
• Adjustable speed: 3,000–10,000 min-1 (500 min-1 steps)
• Rotor peripheral speed: 22–72 m/s
• Sieve apertures: trapezoid 0.08–2.00 mm; round 3 / 4 / 10 mm
• Collector: standard 5 L; optional 30 L; cyclone 0.25–30 L
• Drive / Power: 3‑phase motor, 200–240 V 50/60 Hz, 2.5 kW
• Construction: stainless steel grinding chamber, hopper and in/outlets
• Protection class: IP 41
• Dimensions (W×H×D): 600 × 1200 × 700 mm (with base frame)
• Net weight: ≈ 60 kg (with base frame)
• Standards: CE