RETSCH / ULTRA CENTRIFUGAL MILL

ZM 300.
Fine grinding. Controlled preparation.

High-speed laboratory preparation for soft, medium-hard, brittle and fibrous samples. Match the rotor, ring sieve and collection system to the analysis, with cassette-temperature monitoring to help develop repeatable methods.

Discuss ZM 300 Technical data

Configurations and accessories shown may be optional.

FEED SIZE*< 10 mm

FINAL FINENESS*< 40 µm

SPEED6,000–23,000 rpm

THE MODEL IN FOCUS

Fine analytical preparation and temperature-sensitive sample methods.

Monitor the process

The temperature sensor reads the cassette lid near the ring sieve. Use the displayed value to assess heat buildup and refine speed and feeding.

Choose the grinding action

Six-, twelve- and twenty-four-tooth rotors address different sample behaviors. Ring sieves span 0.08–10 mm openings.

Separate sample and drive

Removable cassette components simplify recovery and cleaning. Standard and volume cassettes offer useful sample volumes of 300 and 600 mL.

Extend collection

Discuss a DR 100 feeder, cyclone collection and supported cold-grinding arrangements for larger or heat-sensitive sample workflows.

*Published feed limits, fineness and throughput depend on the material, sieve, speed and configuration. Sieve aperture is not the final particle size, and maximum throughput and finest output are not simultaneous guarantees.

FUNCTIONAL PRINCIPLE

How ZM 300
works.

Feed enters the toothed rotor, is accelerated outward and pre-ground by impact. Fine grinding then takes place between the rotor and fixed ring sieve. The sample exits to the surrounding cassette or a configured cyclone collection system.

Match sample behavior and feed dimensions
Choose the actual sieve, speed and contact materials
Validate the output with a representative trial

ZM 300 operating components or configuration example — Configuration example; confirm the accessories and arrangement.

PUBLISHED TECHNICAL DATA

The technical
picture.

ZM 300: ultra centrifugal mill for soft, medium-hard, brittle, fibrous samples.

Published feed limits, fineness and throughput depend on the material, sieve, speed and configuration. Sieve aperture is not the final particle size, and maximum throughput and finest output are not simultaneous guarantees. Confirm current electrical and installation requirements before ordering.

Maximum feed size*: < 10 mm
Final fineness*: < 40 µm
Batch size / feed quantity: 300 ml with standard cassette 600 ml with volume cassette 4500 ml / 2500 ml / 450 ml / 230 ml with cyclone
Speed at 50 Hz (60 Hz): 6,000 - 23,000 min-1, free selectable
Collector capacity: 900 ml with standard cassette 1200 ml with volume cassette 5000 ml / 3000 ml / 500 ml / 250 ml with cyclone
Power consumption: 1750 VA ((200..240V), 1400 VA (110..120V)
W x H x D closed: 452 x 431 x 426 mm
Net weight: ~ 38 kg

All other specifications

Applications: fine grinding
Field of application: agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment / recycling, food, geology / metallurgy, medicine / pharmaceuticals
Feed material: soft, medium-hard, brittle, fibrous
Size reduction principle: impact, shearing
Rotor peripheral speed: 31 - 119 m/s
Types of rotors: 6-tooth rotor / 12-tooth rotor / 24-tooth rotor
Material of grinding tools: stainless steel, titanium, stainless steel with wear-resistant coating
Sieve sizes: trapezoid holes 0.08 / 0.12 / 0.20 / 0.25 / 0.50 / 0.75 / 1.00 / 1.50 / 2.00 mm round holes 3.00 / 4.00 / 5.00 / 6.00 / 10.00 mm
Setting of grinding time: no
Drive: 3-phase asynchronous motor with frequency converter
Power connection: 1-phase
Protection code: IP 30
Standards: CE

CONFIGURE THE WORKFLOW

The options shape
the result.

Rotors & ring sieves

Choose tooth count, sieve aperture and tool material around the sample. Distance sieves reduce the shearing contribution and frictional heat. Sieve opening is not identical to the final particle size.

Collection & automated feeding

The standard cassette has 900 mL nominal capacity but 300 mL useful sample volume; the larger cassette has 1,200 mL nominal and 600 mL useful volume. Cyclone vessel capacities and useful volumes also differ. Review DR 100 feeding and the complete collection setup.

Cold grinding & contamination control

Supported methods include external sample embrittlement or an appropriate dry-ice workflow. Discuss the operating procedure, ventilation and compatible components. Stainless, titanium and coated tool choices influence wear and contamination; none eliminates every source of contamination.

TYPICAL MATERIALS

Start with your sample.

Examples guide the discussion; they do not guarantee a result for every material or formulation.

Feed & grains
Plant material
Polymers
Powder coatings
Spices
Pharmaceutical samples

Explore materials & applications

MODEL APPLICATION REVIEW

Put ZM 300
to the material test.

Share the starting size, desired fineness and quantity to process. We’ll review the milling route, tools, collection and opportunities for a material trial.