TM 300: Drum Mill and Bond Index Tester
Brand: Retsch | Category: Scientific & Laboratory Equipment
Drum mill for dry and wet grinding of soft, hard, brittle and fibrous material, with drums from 5 to 43.3 litres. Fitted with the ball or rod module it also serves as a Bond Index Tester, which is the standard way to quantify the grindability of ores and minerals ahead of plant design.
Technical Specifications
| Parameter | Value |
|---|---|
| Feed material | soft, hard, brittle, fibrous - dry or wet |
| Size reduction principle | friction |
| Final fineness | 20 µm (Bond Index: 100 µm ball, 2,100 µm rod) |
| Batch size / feed quantity | minimum 1 l / maximum 20 l used as Bond Index Tester: min. 15 kg with ball module / min. 20 kg with rod module |
| Rotation speed | 1 - 80 min-1 used as Bond Index Tester: 70 min-1 with ball module / 46 min-1 with rod module |
| Material of grinding tools | hardened steel, stainless steel used as Bond Index Tester: hardened steel |
| Grinding drum sizes | 5 l / 10 l / 21.7 l / 43.3 l (Bond Index: 21.7 l ball, 43.3 l rod) |
| Setting of grinding time | digital |
| Drive | 3-phase asynchronous motor with frequency converter |
| Drive power | 0.75 kW |
| Electrical supply data | different voltages |
| Power connection | 1-phase |
| Power consumption | ~ 1800 VA |
| Protection code | IP 41 |
| W x H x D closed | 1500 x 1200 x 700 mm |
| Net weight | ~ 306 kg |
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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