MSK-SFM-HM Benchtop Hammer Mill by Hefei Kejing
| Brand | Hefei Kejing |
|---|---|
| Model | MSK-SFM-HM |
| Type | Laboratory Hammer Mill |
| Input Size | < Φ70 mm |
| Output Size | 3–6 mm |
| Throughput | ~200 kg/hr |
| Motor Power | 1500 W |
| Voltage | 208–240 VAC, 50/60 Hz |
| Screen Aperture | 6 mm stainless steel mesh |
| Hammer Material | High-manganese steel |
| Net Weight | 80 kg |
| Dimensions (L×W×H) | 600 × 450 × 700 mm |
| Certification | CE |
| Warranty | 1 year standard, lifetime technical support |
Overview
The MSK-SFM-HM is a compact, CE-certified benchtop hammer mill engineered for controlled size reduction of brittle and moderately hard inorganic materials in research laboratories and pilot-scale R&D environments. Operating on the principle of high-speed impact comminution, it utilizes rotating hammers mounted on a horizontal shaft to fracture feed material against a stationary breaker plate and perforated screen assembly. Unlike attrition- or shear-based grinders, this device delivers rapid, batch-wise primary crushing with consistent particle size distribution—ideal for preparing representative sub-samples prior to downstream analysis (e.g., XRD, SEM-EDS, chemical assay) or secondary grinding in planetary ball mills. Its design prioritizes operational safety, mechanical robustness, and repeatable throughput under variable load conditions typical of academic and industrial materials science labs.
Key Features
- High-strength manganese steel hammers ensure extended service life when processing ceramics, sintered oxides, metallic alloys, and geological specimens.
- Interchangeable 6 mm stainless steel screen enables reproducible top-cut sizing; optional screens (3 mm, 10 mm) available for customized output gradation.
- Integrated motor guard, emergency stop button, and fully enclosed grinding chamber comply with EN 60204-1 electrical safety standards and reduce operator exposure to dust and flying particles.
- Tool-free access to hammer assembly and screen compartment simplifies routine maintenance and cleaning—critical for cross-sample contamination control in multi-material workflows.
- Stable base frame with anti-vibration rubber feet minimizes transmission of operational harmonics to adjacent instrumentation (e.g., balances, spectrometers).
- Designed for continuous duty cycles up to 30 minutes per batch; thermal overload protection prevents motor damage during prolonged operation.
Sample Compatibility & Compliance
The MSK-SFM-HM accepts feed materials with Mohs hardness ≤ 6.5 and compressive strength below 200 MPa—including alumina and zirconia ceramics, feldspar and quartz aggregates, cast iron chips, and sintered battery cathode powders. It is not intended for fibrous, sticky, or highly ductile samples (e.g., polymers, soft metals, hydrated salts). All structural components conform to RoHS Directive 2011/65/EU. The unit carries CE marking under Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. Documentation includes EU Declaration of Conformity and risk assessment report—available upon request for GLP-compliant lab audits.
Software & Data Management
This hammer mill operates as a standalone mechanical system with no embedded microcontroller or digital interface. All operational parameters (voltage, frequency, runtime) are manually set via front-panel controls. For traceability in regulated environments, users are advised to log batch-specific metadata—including sample ID, feed mass, screen type, ambient temperature, and operator initials—in laboratory notebooks or LIMS-compatible spreadsheets. While no proprietary software is bundled, the device’s mechanical simplicity ensures full compatibility with ISO/IEC 17025-aligned calibration protocols and routine preventive maintenance scheduling.
Applications
- Preparation of homogeneous feedstock for X-ray fluorescence (XRF) and inductively coupled plasma (ICP-OES/MS) digestion protocols.
- Rapid downsizing of sintered ceramic pellets or metallurgical coupons prior to sectioning and metallographic analysis.
- Size homogenization of mineral ore composites for geochemical reference material certification studies.
- Intermediate crushing step between jaw crusher output and planetary ball mill input in multi-stage comminution sequences.
- Particle size distribution benchmarking using laser diffraction (e.g., Malvern Mastersizer) after sieving through ASTM E11 standard test sieves.
FAQ
Can the MSK-SFM-HM achieve final particle sizes below 100 µm?
No. This unit is designed for primary crushing only. Final micronization requires downstream equipment such as planetary ball mills or jet mills.
Is the 6 mm screen included with the base configuration?
Yes—the standard delivery includes one 6 mm stainless steel perforated screen mounted beneath the hammer rotor.
What maintenance intervals are recommended for optimal performance?
Inspect hammer wear and screen integrity before each use; replace hammers when edge thickness drops below 4 mm. Lubricate main shaft bearings every 200 operating hours using ISO VG 68 mineral oil.
Does the unit support 208 V / 60 Hz operation in North American laboratories?
Yes—its universal motor is rated for 208–240 VAC at either 50 Hz or 60 Hz without internal modification.
Can I process wet or slurry-based feed materials?
No. The MSK-SFM-HM is strictly for dry, free-flowing solids. Introducing moisture risks screen clogging, hammer imbalance, and electrical hazards.
