Grindemann CR200 Rotational Impact Grinder
| Brand | Grindemann |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | CR200 |
| Instrument Type | Impact Grinder |
| Sample Type | Soft Materials |
| Feed Size | ≤25 mm |
| Output Particle Size | 40 µm – 10 mm |
| Batch Capacity | 0.25–30 L |
| Speed Range | 3,000–10,000 rpm |
| Rated Power | 3 kW |
| Rated Voltage/Frequency | 380 V / 50 Hz |
| Dust Collection System | Integrated |
| Safety Features | Quick-Release Door Lock & Motor Brake |
| Mobility | Floor-Mountable with Casters |
| Material Options | Customizable Stainless Steel Grinding Chamber & Hopper (e.g., AISI 316 for Pharma/Biotech) |
Overview
The Grindemann CR200 Rotational Impact Grinder is an industrial-grade laboratory and pilot-scale grinding system engineered for rapid, low-heat size reduction of soft to moderately friable materials. Unlike conventional ball or blade mills, the CR200 employs a high-speed rotational impact principle: a horizontally mounted rotor equipped with hardened steel impact bars rotates within a fixed cylindrical grinding chamber. As samples are fed into the chamber, centrifugal force accelerates particles toward the rotating bars, inducing repeated impact and shear events against the chamber wall and between particles. This mechanism ensures efficient comminution while minimizing thermal degradation—critical for heat-sensitive organic compounds, botanicals, pharmaceutical excipients, and functional food ingredients. Designed for reproducible batch processing from 0.25 L to 30 L, the CR200 bridges the gap between benchtop grinders and production-scale hammer mills, supporting method development, QC sampling, and formulation prototyping in regulated and non-regulated environments.
Key Features
- High-speed variable-frequency drive (3,000–10,000 rpm) enables precise control over impact energy and residence time, allowing optimization of particle size distribution (PSD) for diverse material classes.
- Integrated dust extraction interface compatible with standard lab vacuum systems or centralized HVAC ducting—reduces airborne particulate exposure and prevents cross-contamination between batches.
- Quick-release pneumatic or mechanical door latch system with interlocked motor brake ensures immediate rotor stoppage upon lid opening, meeting IEC 60204-1 machinery safety requirements.
- Modular stainless steel construction: Standard chamber and hopper fabricated from AISI 304; optional AISI 316L upgrade available for corrosion resistance and compliance with USP , ISO 10993, and FDA 21 CFR Part 211 cleanroom-compatible applications.
- Ground-mounting flange kit included; heavy-duty locking casters facilitate repositioning within shared lab spaces without requiring permanent installation.
- Thermal management design—including airflow-optimized housing and low-friction bearing assembly—limits temperature rise to <15 °C above ambient during continuous operation at rated load.
Sample Compatibility & Compliance
The CR200 is validated for soft, fibrous, granular, and mildly abrasive feedstocks including herbal powders, cereal grains, animal feed pellets, fertilizer blends, coal ash, rare-earth oxide agglomerates, and pharmaceutical tablets or granules. It excludes highly elastic polymers, wet/sticky pastes, or metal alloys. Feed material must be dry (<10% moisture content) and free of ferrous contaminants to prevent rotor imbalance or chamber wear. The instrument conforms to CE Machinery Directive 2006/42/EC, EMC Directive 2014/30/EU, and RoHS 2011/65/EU. Optional IQ/OQ documentation packages support GLP and GMP-aligned validation per ASTM E2500 and ISO/IEC 17025 requirements.
Software & Data Management
While the base CR200 operates via analog speed control and manual timer, an optional digital control module (CR200-DIGI) provides RS-485 Modbus RTU communication, real-time RPM logging, and event-triggered data export (CSV) for traceability. Audit trails record start/stop timestamps, speed setpoints, and door-open events—fully compliant with FDA 21 CFR Part 11 when paired with validated electronic signature workflows. All firmware updates are delivered via encrypted USB key; no cloud connectivity is embedded, preserving data sovereignty in sensitive research or classified manufacturing settings.
Applications
- Pharmaceutical R&D: Pre-formulation grinding of APIs and excipients prior to dissolution testing (USP ) or blend uniformity analysis (USP ).
- Agri-food QA: Homogenization of grain composites and spice blends for mycotoxin screening (AOAC 2005.08) and elemental analysis (ICP-OES/MS).
- Environmental labs: Size reduction of fly ash, slag, and soil amendments to achieve representative sub-sampling per ISO 13877 and EPA Method 3050B.
- Materials science: Preparation of rare-earth compound feedstock for sintering trials, ensuring narrow PSD and minimal oxidation.
- Feed nutrition studies: Controlled milling of pelleted rations to simulate rumen digestion kinetics in vitro (ISO 6497).
FAQ
What types of materials are unsuitable for the CR200?
Materials with high elasticity (e.g., rubber, silicone), excessive moisture (>12% w/w), or significant metallic content (e.g., catalyst residues, machining swarf) may cause rotor imbalance, chamber abrasion, or safety hazards.
Can the CR200 be used under inert atmosphere conditions?
Yes—custom purging ports and O-ring-sealed feed hoppers are available for nitrogen or argon blanketing to prevent oxidation of air-sensitive compounds.
Is calibration required before first use?
No routine calibration is mandated; however, users must verify rotor balance (per ISO 1940-1 G2.5 grade) and validate PSD output against reference standards (e.g., NIST SRM 1979) as part of initial qualification.
Does Grindemann provide method transfer support?
Yes—application engineers supply SOP templates, PSD correlation charts (D10/D50/D90 vs. rpm/feed rate), and comparative grinding efficiency reports versus planetary ball mills or cryo-grinders.
