PM 400: Planetary Ball Mill
Brand: Retsch | Category: Scientific & Laboratory Equipment
Floor standing planetary ball mill with four grinding stations, taking a maximum batch of 4 x 220 ml, or eight samples with stacked jars. The speed ratio can be set to 1 to minus 2, 1 to minus 2.5 or 1 to minus 3, which changes the balance between impact and friction in the grinding action.
Technical Specifications
| Parameter | Value |
|---|---|
| Feed material | soft, hard, brittle, fibrous - dry or wet |
| Size reduction principle | impact, friction |
| Max. feed size | 10 mm |
| Final fineness | 1 µm, for colloidal grinding 0.1 µm |
| Batch size / feed quantity | max. 4 x 220 ml, max. 8 x 20ml with stacked grinding jars |
| Speed ratio | 1:-2 / 1:-2.5 / 1:-3 |
| Sun wheel speed | 30 - 400 min-1 |
| Effective sun wheel diameter | 300 mm |
| G-force | 26.8 g |
| Type of grinding jars | EasyFit, optional areation covers, safety closure devices |
| Material of grinding tools | hardened steel, stainless steel, tungsten carbide, agate, sintered aluminium oxide, silicon nitride, zirconium oxide |
| Grinding jar sizes | 12 ml / 25 ml / 50 ml / 80 ml / 125 ml / 250 ml / 500 ml |
| Stackable grinding jars | 12 ml / 25 ml / 50 ml / 80 ml |
| Adapter for single-use glas vials | 24 x 1.5 ml / 7 x 20 ml |
| Setting of grinding time | digital, 00:00:01 to 99:59:59 |
| Interval operation | yes, with direction reversal |
Published manufacturer data for the listed model or variants. Confirm the exact configuration, accessories and test conditions in the quotation. Checked 2026-09-29.
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