Frewitt — Industrial Milling Machines & Powder Processing Systems
Global supply of high-performance conical, hammer, and pin milling systems by Frewitt (Switzerland). Complete turnkey supply of modular FlexMill platforms, ConiWitt granulate sizers, PowerMill PMV-320 vacuum micronizers, FlexMill-Lab R&D stations, and NanoMill wet bead mills from SpareX.
Frewitt FlexMill Modular Powder Comminution Platforms
Versatile FlexMill platforms combine up to five exchangeable milling heads on a single drive unit. The system handles conical sizing, hammer pulverization, deagglomeration, and pin milling. AISI 316L stainless steel contact parts with Ra < 0.4 µm meet stringent GMP standards.
- Standardized drive unit enabling complete milling head changeover within minutes
- Sanitary stainless steel construction in AISI 316L or Hastelloy C22
- Engineered for ATEX zone 0/20 with containment compatibility up to OEB 5
- Interchangeable mill heads, hygienic Tri-Clamp ferrules, and FDA silicone seals
ConiWitt CW-150 / CW-200 Conical Sieve Milling Systems
ConiWitt conical sieve mills provide gentle size reduction and grading for wet and dry bulk granulates. The conical rotor operates at high rotational velocity, passing material through screens without heat buildup. Throughput ranges from 50 kg/h to 6,000 kg/h with minimal dust emission.
- Conical perforated and rasp sieves available with aperture sizes from 150 µm to 10 mm
- Precision square-bar and knife-edge rotors tailored for gentle granulation sizing
- Explosion-proof design with nitrogen inerting and continuous temperature monitoring
- Replacement conical screens, drive belts, bearings, and shaft seals
HammerWitt HW-3 / HW-6 Fine Pulverization Hammer Mills
HammerWitt industrial hammer mills deliver high-impact comminution of hard and crystalline bulk products. The high-speed rotor runs at variable speeds, achieving target particle fineness down to below 30 µm. An optional Cryo module injects liquid nitrogen for processing elastic resins.
- High-velocity rotor equipped with reversible hardened hammer beaters
- Heavy-duty perforated screen liners with hole diameters from 0.5 mm to 8.0 mm
- Integrated cryogenic injection module dedicated to heat-sensitive materials
- Replacement beaters, dynamic shaft seals, screen baskets, and oxygen sensors
PinWitt PMC-160 / 260 Continuous Fine Grinding Pin Mills
PinWitt PMC pin mills are engineered for continuous high-fineness micronization of dry active pharmaceutical ingredients. High-speed pin discs deliver impact speeds over 200 m/s, reaching PSD down to D90 < 10 µm. Continuous throughput reaches 150 kg/h with precise thermal control.
- Precision-machined tungsten carbide or hardened pin discs for wear resistance
- Ultrafine comminution achieving particle size distribution down to D90 < 10 µm
- Integrated liquid cooling jackets to safeguard temperature-sensitive active compounds
- Spare rotor discs, air-purged labyrinth seals, high-speed bearings, and O-rings
PowerMill PMV-320 Vacuum Impact Pin Milling Micronizers
The PowerMill PMV-320 vacuum pin mill operates under deep negative pressure, eliminating bulky cyclones and compressors. The unit achieves fine particle output down to D90 < 6 µm at industrial capacities up to 1,000 kg/h. The contained design ensures ATEX 0/20 explosion protection.
- Ultrafine dry micronization of bulk materials down to D90 < 6 µm particle size
- Industrial throughput rating reaching up to 1,000 kg/h within a compact footprint
- Advanced vacuum milling principle avoiding external compressed air and dust explosion
- Vacuum seals, precision pin discs, sanitary containment valves, and pressure transducers
FlexMill-Lab Multiprocess Platforms & NanoMill NW Bead Mills
The FlexMill-Lab system is designed for R&D trials, small batches from 50 g, and scale-up to full production. The platform supports 6 exchangeable milling heads, including the NanoMill NW-50 wet bead mill for comminution down to D50 < 50 nm. Thermal regulation prevents biomolecule degradation.
- Versatile R&D station accommodating conical, hammer, oscillating, and wet bead heads
- Flexible sample processing capacity spanning from 50 milligrams up to 1.5 kg pilot batches
- Wet nanomilling capability generating stable submicron dispersions down to D50 < 50 nm
- Miniature rotors, ceramic zirconia grinding chambers, sanitary seals, and quick clamps
Industrial Powder Milling & Size Reduction Capabilities of Frewitt
Swiss manufacturer Frewitt Fabrique de Machines SA engineers modular dry and wet comminution platforms tailored for pharmaceutical, fine chemical, food, and battery material manufacturing.
The flagship FlexMill concept allows operators to configure a single drive chassis with five interchangeable milling heads to suit evolving production recipes.
The comprehensive equipment portfolio spans ConiWitt conical sieve mills for gentle granule sizing, HammerWitt high-speed hammer mills for crystalline powders, PinWitt continuous pin mills for fine grinding, PowerMill PMV-320 vacuum impact systems for micronization down to D90 < 6 µm, and NanoMill NW bead mills for wet suspensions.
Equipment Sizing, Milling Head Selection, and Containment Criteria
Selecting an optimal Frewitt comminution system depends on incoming feed friability, target particle size distribution (PSD), thermal sensitivity, and required throughput.
For research institutes and pilot trials, the versatile FlexMill-Lab processes sample quantities from milligrams up to 1.5 kg, ensuring linear scale-up to production machinery.
For commercial manufacturing of potent active pharmaceutical ingredients (HPAPI), SpareX engineers configure fully contained processing lines featuring vacuum pin milling, explosion containment compliant with ATEX zone 0/20 (MIE > 1 mJ), nitrogen inerting, and integration into rigid isolators rated up to OEB 5.
Frewitt and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Frewitt and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.
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Documents and sources
- Frewitt official website — Swiss milling and powder processing technologies
- FlexMill modular milling platform — interchangeable comminution processes
- FlexMill CW-150 conical sieve mill — gentle deagglomeration and sizing
- FlexMill HW-6 hammer mill — fine pulverization of hard crystalline materials
- FlexMill PMC-260 continuous pin mill — fine grinding down to D90 < 10 um
- PowerMill PMV-320 vacuum pin mill — high impact micronization down to D90 < 6 um
- FlexMill-Lab NW-50 wet nano bead mill — pharmaceutical nanomilling
- Frewitt After Sales Services (FSAV) — spare parts supply, maintenance and audit
- Frewitt expertise — Swiss milling engineering and manufacturing since 1946
- Frewitt official press release on product range expansion and global supply
