MSK-SFM-3LN Liquid Nitrogen Cryogenic Rotor Mill with 5L Vacuum Insulated Stainless Steel Container and Programmable Speed Control
The MSK-SFM-3LN is engineered for precision cryogenic grinding of both soft and tough materials, enabling particle size reduction down to 1 micron at temperatures as low as -160°C. This capability is essential for applications requiring preservation of material properties sensitive to heat or oxidation during milling. The mill integrates a 5-liter stainless steel container with vacuum thermal insulation to maintain ultra-low temperatures using liquid nitrogen, ensuring consistent cryogenic conditions throughout the grinding process.
Operating with an anchor-type stainless steel rotor blade, the mill offers adjustable rotational speeds up to 1200 RPM, controlled via a programmable controller that allows customization of milling time, speed, and rotation direction to suit diverse sample requirements. The container is lined with PTFE to minimize contamination and resist corrosion. Temperature inside the container is continuously monitored by a thermocouple sensor, while liquid nitrogen flow is regulated by a CSA-certified cryogenic solenoid valve to maintain stable thermal conditions. The system accommodates input particles up to 20 mm and supports milling media loads up to 3.5 kg, with recommended ball diameters under 5 mm for optimal grinding efficiency.
Key Features
- 5-liter SS 304 vacuum jacketed milling container with PTFE liner for corrosion resistance and contamination control
- Programmable controller for precise adjustment of milling time, rotor speed (0-1200 RPM), and rotation direction
- Anchor-type stainless steel milling blade with variable speed control
- Temperature control down to -160°C enabled by liquid nitrogen cooling and thermocouple feedback
- Vacuum jacket includes KF 25 port and needle valve for optional vacuum pump connection (not included)
- Supports input particle sizes up to 20 mm and output particle sizes as fine as 1 micron
- Compatible with up to 3.5 kg of milling media, recommended ball size under 5 mm diameter
- CE certified; NRTL certification available optionally
Technical Specifications
| Parameter | Specification |
|---|---|
| Container Material | Stainless Steel 304 with PTFE liner |
| Container Capacity | 5 liters |
| Container Dimensions | Inner Diameter 210 mm; Height 180 mm |
| Rotor Blade Type | Anchor type stainless steel |
| Rotor Speed | 0–1200 RPM adjustable |
| Input Particle Size | Up to 20 mm |
| Output Particle Size | Down to 1 micron |
| Milling Media Load | Max 3.5 kg (ball size <5 mm recommended) |
| Temperature Range | Down to -160°C |
| Power Supply | 208-240 VAC, single phase, max 10 A |
| Vacuum Jacket Features | KF 25 port and needle valve (vacuum pump not included) |
| Weight | Approx. 30.2 lb (13.7 kg) |
Typical Applications
This cryogenic rotor mill is ideal for grinding temperature-sensitive materials such as polymers, pharmaceuticals, food products, and rare earth or magnetic materials that require low-temperature processing to prevent degradation. It is also suitable for preparing samples for advanced material characterization or for producing fine powders in research and development settings.
Configuration & Operating Notes
The system requires an external liquid nitrogen supply and piping, which are not included and should be sourced locally. The vacuum pump for the container’s vacuum jacket is optional and must be ordered separately. Milling media such as zirconia balls can be selected based on application needs and are sold separately. The programmable controller enables customization of milling parameters to optimize results for different materials. For applications involving high viscosity pastes, the liquid nitrogen temperature control and solenoid valve can be removed to use the device as a mixer.
