SR 300: Rotor Beater Mill
Brand: Retsch | Category: Scientific & Laboratory Equipment
Rotor beater mill for coarse and fine size reduction of soft to medium hard material, working by impact against a fixed beater arrangement. Speed is adjustable in 500 rpm steps so grinding can be tuned to the sample, and a ring sieve defines the final fineness down to below 50 µm.
Technical Specifications
| Parameter | Value |
|---|---|
| Feed material | soft, medium-hard |
| Max. feed size | 25 mm |
| Final fineness | 50 µm |
| Speed at 50 Hz (60 Hz) | 3,000 - 10,000 min-1 (in steps of 500 min-1) |
| Rotor peripheral speed | 22 ..72 m/s |
| Types of rotors | standard / distance |
| Material of grinding tools | rotor and sieves of stainless steel |
| Sieve sizes | 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 |
| Hinged hopper | removeable hopper |
| Dust extraction unit | optional cyclone |
| Collector capacity | 5 l / optional: 30 l |
| Drive | 3-phase motor |
| Electrical supply data | 200-240 V, 50/60 Hz |
| Power connection | 1-phase |
| Engine brake | yes, electric |
| Protection code | IP 41 |
| Power consumption | 2.5 kW |
| W x H x D closed | 600 x 1200 x 700 mm (with base frame) |
Published manufacturer data for the listed model or variants. Confirm the exact configuration, accessories and test conditions in the quotation. Checked 2026-09-29.
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