Disc size sets what the grinder will reach and free speed sets how the disc cuts. A small disc gets into a corner a large one cannot, and a large disc removes more per pass. Both numbers sit on every listing here, and the third figure that matters is air consumption, because a grinder that outruns the compressor stops being a grinder.
The way in runs four routes: by disc size, from 50mm mini tools up to 115mm; by free speed, which reaches 22000rpm on the smaller heads; by head form, angle for working across a face and straight for working along one; and by housing, where heavy-duty and composite bodies suit different working days. Free speed is stated on 70 of the 78 lines and weight on most of the rest.
Housing is not a cosmetic choice. A heavy-duty body takes knocks and sits steady in the hand where a composite body saves weight over a long shift. The mini tools sit at the top of the speed range because a small disc needs speed to cut at all, and the larger 100 and 115mm heads run slower with more torque behind them. Two cordless 115mm lines are seated on this leaf as well, for the same disc size without an air line at all.
Air consumption is the figure that decides whether a grinder suits the compressor already in the bay. A tool drawing more than the machine delivers will run in bursts and never reach its rated speed. The listings state consumption alongside speed so the two can be read together, and anything unresolved goes over WhatsApp on 07754288583 with a photo of the compressor plate. Weight is stated alongside, because a grinder held above shoulder height all morning is judged on mass as much as on output.
| Disc size | 100mm |
|---|---|
| Free speed | 9000rpm |
| Operating air pressure | 90psi (6.2bar) |
| Average air consumption | 6.5cfm (184l/min) |
| Minimum hose size (ID) | 3/8” (10mm) |
| Air Inlet | 1/4" BSP |
|---|---|
| Average Air Consumption | 6.5cfm (184L/min) |
| Disc Size | 100mm |
| Free Speed | 11,000 rpm |
| Min Hose Size | 3/8" (10mm) |
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