SPEX SamplePrep 8550 ShatterBox® Multi-Function Disc Grinder

Overview

The SPEX SamplePrep 8550 ShatterBox® is a high-performance, benchtop disc grinder engineered for reproducible, controlled size reduction of hard, brittle, and heterogeneous solid samples in analytical and preparatory laboratories. Based on the principle of high-energy impact and shear between two counter-rotating, horizontally opposed grinding discs—typically one stationary and one oscillating—the instrument delivers rapid comminution without significant heat buildup or cross-contamination. Unlike planetary ball mills or jaw crushers, the 8550 ShatterBox® employs a patented disc geometry and dynamic force distribution to ensure uniform energy transfer across the sample bed, minimizing preferential fracture and preserving representative particle size distributions. Its design targets applications where regulatory traceability, operator safety, and minimal sample loss are critical—particularly in QA/QC workflows compliant with ISO/IEC 17025, ASTM D75, USP <201>, and GLP environments requiring documented process parameters.

Key Features

• Automated disc locking mechanism with guided positioning ensures repeatable alignment and eliminates manual torque variability during setup.
• Motor-driven disc lift system enables hands-free elevation of the upper grinding disc, facilitating safe and ergonomic loading/unloading of sample containers—even with heavy or hazardous materials.
• Modular disc and cup configuration supports interchangeable grinding media (e.g., stainless steel, tungsten carbide, agate, zirconia) and container sizes—from small 30 mL cups for trace analysis to larger 150 mL configurations—without tooling changes.
• Intuitive LCD touchscreen interface provides real-time control over grinding time (0.1–99.9 min), speed (800–1200 rpm), and programmable pause intervals, with non-volatile memory for up to 20 user-defined methods.
• Robust cast-iron frame and vibration-dampening base reduce operational noise (<72 dB at 1 m) and prevent resonance-induced drift during extended runs.
• Integrated safety interlocks disable operation unless both chamber lid and disc assembly are fully engaged and verified via proximity sensors.

Sample Compatibility & Compliance

The 8550 ShatterBox® accommodates a broad spectrum of inorganic and organic solids, including but not limited to cement clinker, granulated blast furnace slag, ceramic powders, sintered oxides, geological aggregates (granite, basalt, sandstone), pharmaceutical excipients, botanical matrices (seeds, dried leaves), catalyst supports (alumina, silica, zeolites), and metallurgical alloys (Inconel, Hastelloy). It meets mechanical safety requirements per IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emissions), and its enclosed grinding chamber complies with OSHA 1910.212 (machine guarding) and EU Machinery Directive 2006/42/EC. Optional documentation packages support audit readiness for FDA 21 CFR Part 11-compliant data integrity when paired with validated software export protocols.

Software & Data Management

While the 8550 operates as a standalone instrument, its embedded firmware logs all run parameters—including start/stop timestamps, actual speed profile, elapsed time, and motor load feedback—to internal flash memory. Export is supported via USB 2.0 port in CSV format for integration into LIMS or ELN platforms. Optional IQ/OQ/PQ validation kits include test protocols aligned with ASTM E2500 and ISO 14644-1, covering performance verification under defined environmental conditions and traceable calibration of rotational speed using NIST-traceable tachometry.

Applications

• Homogenization of heterogeneous geological and metallurgical samples prior to XRF, ICP-OES, or XRD analysis.
• Preparation of certified reference materials (CRMs) with certified particle size distributions per ISO Guide 35.
• Routine batch grinding of pharmaceutical raw materials to meet USP <701> disintegration and <201> particle size testing specifications.
• Fragmentation of composite catalysts for surface area (BET) and pore structure characterization.
• Size reduction of agricultural biomass for NIR calibration model development and compositional profiling.
• Processing of construction materials (e.g., concrete fines, recycled asphalt pavement) for leaching studies per TCLP (EPA Method 1311).

FAQ

What types of grinding discs are compatible with the 8550 ShatterBox®?
Standard options include hardened stainless steel, tungsten carbide, agate, and yttria-stabilized zirconia—each selected based on sample hardness, contamination sensitivity, and required throughput.
Can the 8550 be used for cryogenic grinding?
No—it is not designed for liquid nitrogen cooling; for cryo-applications, SPEX recommends the 6875 Freezer/Mill® series.
Is method transfer possible from older ShatterBox® models?
Yes—grinding time and speed settings scale predictably across the ShatterBox® platform; however, disc geometry differences require empirical re-optimization for new media combinations.
Does the instrument support GMP-compliant electronic records?
When used with validated third-party data acquisition software and proper access controls, the exported CSV logs satisfy ALCOA+ principles for raw data retention and audit trail requirements.
What maintenance is required for long-term reliability?
Routine inspection of disc wear (via micrometer measurement), lubrication of drive shaft bearings every 500 hours, and verification of sensor alignment per quarterly PM checklist included in the service manual.