| Since its introduction over three decades ago, the SPEX SamplePrep Shatterbox has become the most popular “swing mill” in America. Now as then, it is the most efficient way to pulverize up to 100 grams of brittle material to analytical fineness. The Shatterbox swings a dish-shaped grinding container in a tight, high-speed horizontal circle. Inside the container are the sample, a puck, and (in larger containers) a ring. As these grinding elements swing free inside the container, the sample is rapidly crushed between the walls of the container, puck, and ring, and further reduced by the millstone- like action of the puck and ring against the container floor. Grinding times are usually between two and five minutes, with resultant particle size well below 200 mesh. With grinding aids, smaller samples can be reduced below 10 microns. Shatterboxes typically grind cement mix, rocks, slags, soils, ceramics, and ores, but have been used for hundreds of other materials including sulfur pellets, dried marsh-grass, and pharmaceuticals. Grinding containers are available in hardened steel, tungsten carbide, zirconia ceramic, and alumina ceramic, to maximize the mill’s capability and minimize objectionable contamination. There are now two Shatterbox models: the full-size 8515, with electronic controls, sound- proof case, cam-action clamp, and safety interlock; and the original 8500, which offers the same grinding performance as the 8515 but without the timer and cabinet. • Most popular “swing mill” in America.
• Most efficient way of grinding up to 100 grams of brittle
material to analytical fineness.
• Typical samples include cements, soils, ceramics, slag,
rocks, and ores. The Shatterbox has also been used to grind sulfur pellets,
pharmaceuticals, dried marsh grass, and many other materials.
• Swings a dish-shaped grinding container with a puck, andoften a ring, in a tight high- speed circle.
• Typical grinding time is two
minutes or less.
• Resultant particle size well below 200 mesh; with proper grinding aid, less than 10 microns.
• Features a cam-activated clamp that requires only moderate hand pressure to secure the grinding dish in the Shatterbox
and is adjustable for containers of different heights.
• Perforated metal skirt provides ventilation for continuous operation, and a rubber cover protects against dust.
• Includes an antiskid wood/rubber floor mount and an extra set of drive belts.
• A European CEE 7/7 two-prong plug is supplied with each 8500-230/50 system.
• Grinding containers are sold separately.
• Timer is not supplied.
| Grinding Tests with the 8501 and 8504 Grinding Containers | | | | 8501 | 8504 | | Material | Form as received | Time, minutes | Amount, grams | % Passing 325 mesh | Time, minutes | Amount, grams | % Passing 325 mesh | | Asbestor | Fibrous | 12 | 20 | 100 | - | - | - | | Cement, Portland raw mix | > 60 mesh | 2.5 | 40* | 100 | - | - | - | | Ferro-chromium | > 100 mesh | 5 | 25 | 100 | - | - | - | | Ferro-manganese | > 200 mesh | 3 | 25 | 100 | - | - | - | | Ferro-molybdenumchromium | < 80 mesh | 4 | 25 | 100 | - | - | - | | Ferro-niobium | < 80 mesh | 3 | 25 | 100 | - | - | - | | Ferro-silicon | < 80 mesh | 4 | 25 | 100 | - | - | - | | Ferro-titanium | < 80 mesh | 6 | 25 | 100 | - | - | - | | Fiberglass | thin sheets | 2 | 10 | 100 | 2 | 15 | 100 | | Fluorite | > 100 mesh | 3 | 50 | 100 | - | - | - | | Garnet (synthetic) | chunks | 2 | 200 | 15 | 10 | 200 | 96 | | Glass | chunks | 6 | 35 | 100 | 2 | 35 | 100 | | Graphite Mineral Fiber | fiber | 2 | 15 | 100 | - | - | - | | Insulation | fiber | 4 | 15 | 100 | - | - | - | | Oil shale | 6.4mm | 3 | 60 | 100 | - | - | - | | Pesticide | < 100 mesh | 15 | 50 | 100 | - | - | - | | Phosphate, raw mix | > 60 mesh | 2.5 | 40 | 100 | - | - | - | | Iron Powder | < 80 mesh | 6 | 5 | 68 | - | - | - | | Sand | < 10 mesh | 10 | 100 | 100 | 4 | 100 | 100 | | Slag, blast furnace | chunks | 1 | 10** | 100 | - | - | - | * sodium alkylarylsulfonate added 5%
** Household detergent (Tide) added, 10% |
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