Jett Mill – jet mill for fine powder grinding
Jett Mill
Jett mill
Jett mill

Jett Mill – jet mill for fine powder grinding

Jett Mill

Description

HECHT's jet mills are milling systems that micronise dry powders to very fine particle sizes below 10 µm with a narrow particle distribution, using high-velocity gas streams instead of mechanical grinding parts. This results in a contamination-free and thermally gentle process, ideal for applications where precision, product purity and particle size control are essential. The closed system ensures less than 0.1% waste-to-air during milling, with a batch capacity of 50 kg (Compact) to 1000 kg (Industrial, dual-chamber) and a milling duration of 30 to 180 minutes depending on powder type and capacity. The jet mill is suitable for OEB 1-5 applications thanks to zero fugitive emissions and HEPA filter recovery without product loss, and can be used in ATEX and inert gas systems. The system is GMP Annex 1 (2022) compliant, GAMP 5 validatable and has built-in FDA 21 CFR Part 11 milling log.

Customer benefits

  • Contamination-free: no contact with grinding media
  • High precision: particle size control <10 µm
  • Gentle processing: ideal for thermally sensitive products
  • Uniform product: narrow particle distribution
  • Flexibility: suitable for a wide range of materials
  • Safety: usable in ATEX and inert gas systems

Frequently asked questions about the Jett Mill

What is a Jett Mill 2 and why is ultrafine milling important?

Jett Mill 2 is a closed jet-milling system for ultrafine powder processing down to <10 µm. Ultrafine milling is important because: (1) increased surface area, (2) improved bioavailability, (3) better suspension formation, (4) standard in pharma/chemistry.

How much dust exposure occurs during milling?

<0.1% waste-to-air. Closed-system chamber. Dust-free inlet and outlet. Zero fugitive emissions.

How fine can the particles be milled?

Ultrafine down to <10 µm. Precision milling. Broad range of distributions possible. Excellent reproducibility.

Is the Jett Mill 2 GMP compliant?

Yes. GMP Annex 1 (2022) compliant, GAMP 5 validation available. FDA 21 CFR Part 11 milling log built-in. Validation: 4–5 weeks.

What batch capacity does the mill have?

Compact: up to 50 kg/batch. Standard: up to 200 kg/batch. Industrial: up to 1000 kg/batch (dual-chamber). Scalable.

How long does a milling process take?

Compact: 30–60 minutes. Standard: 60–120 minutes. Industrial: 120–180 minutes per batch. Depending on powder type.

Can the mill handle OEB 4–5 activities?

Yes. OEB 1–5 compliant. Closed system with zero fugitive emissions. Dust-free milling. Suitable for critical powder substances.

How much product loss occurs?

Zero product loss. Closed-system chamber. HEPA filter recovery. Optimal batch yield.

Enquire now

Applications

Jet mills are widely used in:

  • Pharmaceutical industry (APIs, inhalation powders, excipients)
  • Chemical and fine chemical industry (pigments, polymers, catalysts)
  • Biotechnology (bioactive substances, uniform particles)
  • Food industry (additives, functional powders)
  • Minerals and ceramics (abrasive materials, oxides)

Suitable for hard, abrasive and heat-sensitive products.

Read also

Product overview

Jet mill – micronizer for ultrafine powder processing

The jet mill is a dry micronisation system that uses high-velocity air or gas streams to reduce particle size.

Operating principle:

  • Product is fed in via a venturi or dosing system
  • Compressed air or gas is injected into the grinding chamber through nozzles
  • Particles accelerate and collide with each other at high speed
  • Particles are reduced by impact and attrition (without grinding media)
  • Fine particles are discharged; coarse particles keep circulating until they reach the desired size

This results in a very precise and reproducible particle size distribution.

Key features

  • Particle size: typically <10 µm
  • No moving grinding parts → no contamination
  • Low thermal load (no heat build-up)
  • Very narrow particle size distribution
  • Suitable for dry powders
  • Modular, compact design
  • Low maintenance costs

Processing options

  • Micronisation of powders to ultrafine fractions
  • Control of particle size and distribution
  • Simultaneous micronisation and coating of particles
  • Processing of abrasive and sensitive materials
  • Closed-loop systems with inert gas (e.g. nitrogen)

Key benefits

  • Contamination-free: no contact with grinding media
  • High precision: particle size control <10 µm
  • Gentle processing: ideal for heat-sensitive products
  • Uniform product: narrow particle size distribution
  • Flexibility: suitable for a wide range of materials
  • Safety: can be used in ATEX and inert gas systems

Technical specifications (approximate)

  • Particle size: <10 µm
  • Capacity: approx. 0.1 – 1,250 kg/h (depending on model)
  • Operating principle: air/gas-driven micronisation
  • Operation: continuous
  • Design: no moving parts

Options:

  • Closed-loop system with nitrogen (inerting)
  • Wear-resistant liners (alumina, SiC, tungsten carbide)
  • Integration with cyclones and filters
  • ATEX version
  • GMP design (pharmaceutical)
  • Automatic process control

Typical applications

  • Micronisation of pharmaceutical APIs and inhalation powders
  • Fine grinding of pigments and dyes
  • Processing of minerals and ceramic materials
  • Products with high purity requirements
  • High-value and specialty chemicals

Why choose Hecht Technology?

Hecht Technology combines process technology with expertise in containment and safe product handling. In combination with jet mills we offer:

  • Engineering and process optimisation
  • Integration into complete production lines
  • Dust-free, safe handling of fine powders
  • Support with GMP, ATEX and high-containment applications

Would you like more information?

Would you like to know whether a jet mill suits your process and target particle size? Contact our specialists for tailored advice.

Uw optimale websitegebruik
Deze website gebruikt cookies en integreert externe media. Door op “✓ Alles accepteren” te klikken, kiest u voor een optimale webervaring en stemt u in met de weergave van externe content. U kunt meer informatie vinden en uw persoonlijke voorkeuren instellen onder “Instellingen”. Meer informatie vindt u in ons Privacybeleid.

Privacybeleid Colofon
Gedetailleerde informatie over het gebruik van cookies en externe media.
Externe media omvatten video's of iframes van andere platforms die op deze website zijn ingesloten. Deze cookies bevatten geanonimiseerde informatie over uw bezoek aan deze website, wat uw gebruikerservaring verbetert. Om de website optimaal te laten functioneren, moet u actief instemmen met het gebruik van deze cookies. U kunt uw persoonlijke instellingen hier configureren. Heeft u nog vragen? Lees meer over uw rechten als gebruiker in het Privacybeleid en de Juridische disclaimer!
Privacybeleid Colofon
Je cookie-instellingen zijn opgeslagen.